e3aaff8e |
/* |
2023340a |
* Copyright (C) 2007-2008 Sourcefire, Inc. |
c7543866 |
* |
2023340a |
* Authors: Tomasz Kojm |
e3aaff8e |
*
* This program is free software; you can redistribute it and/or modify |
bb34cb31 |
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation. |
e3aaff8e |
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software |
48b7b4a7 |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA. |
e3aaff8e |
*/
|
6d6e8271 |
#if HAVE_CONFIG_H
#include "clamav-config.h"
#endif
|
e3aaff8e |
#include <stdio.h>
#include <string.h>
#include <stdlib.h> |
0a80bd02 |
#include <errno.h> |
e3aaff8e |
#include <sys/types.h>
#include <sys/stat.h> |
b58fdfc2 |
#ifdef HAVE_UNISTD_H |
a7f5fd00 |
#include <unistd.h> |
b58fdfc2 |
#endif
#ifdef HAVE_SYS_PARAM_H |
15edd45f |
#include <sys/param.h> |
b58fdfc2 |
#endif |
e3aaff8e |
#include <fcntl.h>
#include <dirent.h> |
888f5794 |
|
bc93eda0 |
#define DCONF_ARCH ctx->dconf->archive
#define DCONF_DOC ctx->dconf->doc
#define DCONF_MAIL ctx->dconf->mail
#define DCONF_OTHER ctx->dconf->other
|
e3aaff8e |
#include "clamav.h"
#include "others.h" |
bc93eda0 |
#include "dconf.h" |
85dd8460 |
#include "scanners.h" |
8000d078 |
#include "matcher-ac.h"
#include "matcher-bm.h" |
e3aaff8e |
#include "matcher.h" |
47bbbc56 |
#include "ole2_extract.h"
#include "vba_extract.h" |
341e5433 |
#include "msexpand.h" |
8d3aca30 |
#include "mbox.h" |
a5373b64 |
#include "chmunpack.h" |
a9082ea2 |
#include "pe.h" |
8d3aca30 |
#include "elf.h" |
888f5794 |
#include "filetypes.h"
#include "htmlnorm.h" |
2b259453 |
#include "untar.h" |
c3a3be2d |
#include "special.h" |
6a31c2b4 |
#include "binhex.h" |
8d3aca30 |
/* #include "uuencode.h" */ |
7bbd5f7f |
#include "tnef.h" |
bf45bf13 |
#include "sis.h" |
2c313298 |
#include "pdf.h" |
bd988961 |
#include "str.h" |
24fd05e1 |
#include "mspack.h"
#include "cab.h" |
52c2a8bd |
#include "rtf.h" |
9d96e4b6 |
#include "unarj.h" |
b8ad506b |
#include "nulsft.h" |
ed93f138 |
#include "autoit.h" |
015ce4a8 |
#include "textnorm.h" |
e3aaff8e |
#include <zlib.h> |
f133da7a |
#include "unzip.h" |
a6e38800 |
#include "dlp.h" |
c4934f41 |
#include "default.h" |
85885226 |
#include "cpio.h" |
89c14869 |
#include "macho.h" |
7ebede9b |
#include "ishield.h" |
81fded11 |
#include "7z.h" |
e3aaff8e |
#ifdef HAVE_BZLIB_H
#include <bzlib.h>
#endif
|
2bb229f6 |
#if defined(HAVE_READDIR_R_3) || defined(HAVE_READDIR_R_2)
#include <limits.h> |
88794204 |
#include <stddef.h> |
2bb229f6 |
#endif
|
3c91998b |
static int cli_scanfile(const char *filename, cli_ctx *ctx); |
4048c4f6 |
|
cb680655 |
static int cli_scandir(const char *dirname, cli_ctx *ctx) |
c7543866 |
{
DIR *dd;
struct dirent *dent;
#if defined(HAVE_READDIR_R_3) || defined(HAVE_READDIR_R_2)
union {
struct dirent d;
char b[offsetof(struct dirent, d_name) + NAME_MAX + 1];
} result;
#endif
struct stat statbuf;
char *fname;
if((dd = opendir(dirname)) != NULL) {
#ifdef HAVE_READDIR_R_3
while(!readdir_r(dd, &result.d, &dent) && dent) {
#elif defined(HAVE_READDIR_R_2)
while((dent = (struct dirent *) readdir_r(dd, &result.d))) {
#else
while((dent = readdir(dd))) {
#endif
if(dent->d_ino)
{
if(strcmp(dent->d_name, ".") && strcmp(dent->d_name, "..")) {
/* build the full name */
fname = cli_malloc(strlen(dirname) + strlen(dent->d_name) + 2);
if(!fname) {
closedir(dd);
return CL_EMEM;
}
|
58481352 |
sprintf(fname, "%s"PATHSEP"%s", dirname, dent->d_name); |
c7543866 |
/* stat the file */
if(lstat(fname, &statbuf) != -1) {
if(S_ISDIR(statbuf.st_mode) && !S_ISLNK(statbuf.st_mode)) { |
cb680655 |
if(cli_scandir(fname, ctx) == CL_VIRUS) { |
c7543866 |
free(fname);
closedir(dd);
return CL_VIRUS;
}
} else {
if(S_ISREG(statbuf.st_mode)) {
if(cli_scanfile(fname, ctx) == CL_VIRUS) {
free(fname);
closedir(dd);
return CL_VIRUS;
}
}
}
}
free(fname);
}
}
}
} else {
cli_dbgmsg("cli_scandir: Can't open directory %s.\n", dirname);
return CL_EOPEN;
}
closedir(dd);
return CL_CLEAN;
}
|
5ca7fd18 |
static int cli_unrar_scanmetadata(int desc, unrar_metadata_t *metadata, cli_ctx *ctx, unsigned int files, uint32_t* sfx_check) |
e3aaff8e |
{ |
133538e0 |
int ret = CL_SUCCESS;
struct cli_meta_node* mdata; |
2b259453 |
|
e3aaff8e |
|
133538e0 |
if(files == 1 && sfx_check) {
if(*sfx_check == metadata->crc)
return CL_BREAK;/* break extract loop */
else
*sfx_check = metadata->crc; |
e3aaff8e |
}
|
d91ab809 |
cli_dbgmsg("RAR: %s, crc32: 0x%x, encrypted: %u, compressed: %u, normal: %u, method: %u, ratio: %u\n", |
794f3f23 |
metadata->filename, metadata->crc, metadata->encrypted, (unsigned int) metadata->pack_size,
(unsigned int) metadata->unpack_size, metadata->method, |
d91ab809 |
metadata->pack_size ? (unsigned int) (metadata->unpack_size / metadata->pack_size) : 0); |
a62ae54f |
|
133538e0 |
/* Scan metadata */
mdata = ctx->engine->rar_mlist;
if(mdata) do {
if(mdata->encrypted != metadata->encrypted)
continue; |
a62ae54f |
|
133538e0 |
if(mdata->crc32 && (unsigned int) mdata->crc32 != metadata->crc)
continue; |
a62ae54f |
|
133538e0 |
if(mdata->csize > 0 && (unsigned int) mdata->csize != metadata->pack_size)
continue; |
a62ae54f |
|
133538e0 |
if(mdata->size >= 0 && (unsigned int) mdata->size != metadata->unpack_size)
continue; |
a62ae54f |
|
133538e0 |
if(mdata->method >= 0 && mdata->method != metadata->method)
continue; |
a62ae54f |
|
133538e0 |
if(mdata->fileno && mdata->fileno != files)
continue; |
a62ae54f |
|
86e209d6 |
if(mdata->maxdepth && ctx->recursion > mdata->maxdepth) |
133538e0 |
continue; |
a62ae54f |
|
92f585fb |
if(mdata->filename && !cli_matchregex(metadata->filename, mdata->filename)) |
133538e0 |
continue; |
a62ae54f |
|
133538e0 |
break; /* matched */ |
a62ae54f |
|
133538e0 |
} while((mdata = mdata->next)); |
a62ae54f |
|
133538e0 |
if(mdata) {
*ctx->virname = mdata->virname; |
e4101980 |
return cli_checkfp(desc, ctx) ? CL_CLEAN : CL_VIRUS; |
133538e0 |
} |
a62ae54f |
|
133538e0 |
if(DETECT_ENCRYPTED && metadata->encrypted) {
cli_dbgmsg("RAR: Encrypted files found in archive.\n");
lseek(desc, 0, SEEK_SET); |
6038397e |
ret = cli_scandesc(desc, ctx, 0, 0, NULL, AC_SCAN_VIR); |
133538e0 |
if(ret != CL_VIRUS) {
*ctx->virname = "Encrypted.RAR";
return CL_VIRUS; |
a62ae54f |
} |
133538e0 |
} |
a62ae54f |
|
2dbcf700 |
return ret;
}
|
133538e0 |
static int cli_scanrar(int desc, cli_ctx *ctx, off_t sfx_offset, uint32_t *sfx_check)
{
int ret = CL_CLEAN; |
5ca7fd18 |
unrar_metadata_t *metadata, *metadata_tmp; |
133538e0 |
char *dir; |
5ca7fd18 |
unrar_state_t rar_state; |
e3aaff8e |
|
133538e0 |
cli_dbgmsg("in scanrar()\n");
|
2b459819 |
if(sfx_offset)
if(lseek(desc, sfx_offset, SEEK_SET) == -1) |
871177cd |
return CL_ESEEK; |
2b459819 |
|
133538e0 |
/* generate the temporary directory */ |
33068e09 |
if(!(dir = cli_gentemp(ctx->engine->tmpdir))) |
5fc380f1 |
return CL_EMEM;
|
133538e0 |
if(mkdir(dir, 0700)) {
cli_dbgmsg("RAR: Can't create temporary directory %s\n", dir);
free(dir);
return CL_ETMPDIR;
}
|
bb7bd3ab |
if((ret = cli_unrar_open(desc, dir, &rar_state)) != UNRAR_OK) { |
33068e09 |
if(!ctx->engine->keeptmp) |
133538e0 |
cli_rmdirs(dir);
free(dir); |
06fd4ce9 |
if(ret == UNRAR_PASSWD) {
cli_dbgmsg("RAR: Encrypted main header\n");
if(DETECT_ENCRYPTED) {
lseek(desc, 0, SEEK_SET);
ret = cli_scandesc(desc, ctx, 0, 0, NULL, AC_SCAN_VIR);
if(ret != CL_VIRUS)
*ctx->virname = "Encrypted.RAR";
return CL_VIRUS;
}
return CL_CLEAN;
} if(ret == UNRAR_EMEM) { |
5ca7fd18 |
return CL_EMEM; |
06fd4ce9 |
} else { |
871177cd |
return CL_EUNPACK; |
06fd4ce9 |
} |
133538e0 |
}
do {
int rc; |
5ca7fd18 |
rar_state.ofd = -1; |
bb7bd3ab |
ret = cli_unrar_extract_next_prepare(&rar_state,dir); |
5ca7fd18 |
if(ret != UNRAR_OK) {
if(ret == UNRAR_BREAK)
ret = CL_BREAK;
else if(ret == UNRAR_EMEM)
ret = CL_EMEM;
else |
871177cd |
ret = CL_EUNPACK; |
2dbcf700 |
break; |
5ca7fd18 |
} |
f009e241 |
if(ctx->engine->maxscansize && ctx->scansize >= ctx->engine->maxscansize) { |
49dca2e3 |
free(rar_state.file_header->filename);
free(rar_state.file_header); |
2dbcf700 |
ret = CL_CLEAN; |
f009e241 |
break; |
2dbcf700 |
} |
f009e241 |
if(ctx->engine->maxscansize && ctx->scansize + ctx->engine->maxfilesize >= ctx->engine->maxscansize)
rar_state.maxfilesize = ctx->engine->maxscansize - ctx->scansize;
else
rar_state.maxfilesize = ctx->engine->maxfilesize;
|
bb7bd3ab |
ret = cli_unrar_extract_next(&rar_state,dir); |
5ca7fd18 |
if(ret == UNRAR_OK)
ret = CL_SUCCESS;
else if(ret == UNRAR_EMEM)
ret = CL_EMEM;
else |
871177cd |
ret = CL_EFORMAT; |
5ca7fd18 |
if(rar_state.ofd > 0) {
lseek(rar_state.ofd,0,SEEK_SET);
rc = cli_magic_scandesc(rar_state.ofd,ctx);
close(rar_state.ofd); |
33068e09 |
if(!ctx->engine->keeptmp) |
871177cd |
if (cli_unlink(rar_state.filename)) ret = CL_EUNLINK; |
133538e0 |
if(rc == CL_VIRUS ) {
cli_dbgmsg("RAR: infected with %s\n",*ctx->virname);
ret = CL_VIRUS; |
e3aaff8e |
break;
}
}
|
133538e0 |
if(ret == CL_SUCCESS) |
44c3b2c8 |
ret = cli_unrar_scanmetadata(desc,rar_state.metadata_tail, ctx, rar_state.file_count, sfx_check); |
133538e0 |
} while(ret == CL_SUCCESS);
if(ret == CL_BREAK)
ret = CL_CLEAN;
metadata = metadata_tmp = rar_state.metadata;
|
cb680655 |
if(cli_scandir(rar_state.comment_dir, ctx) == CL_VIRUS) |
133538e0 |
ret = CL_VIRUS; |
e3aaff8e |
|
bb7bd3ab |
cli_unrar_close(&rar_state); |
cf68af72 |
|
33068e09 |
if(!ctx->engine->keeptmp) |
478ce4b2 |
cli_rmdirs(dir); |
e3aaff8e |
|
478ce4b2 |
free(dir); |
133538e0 |
|
478ce4b2 |
metadata = metadata_tmp;
while (metadata) {
metadata_tmp = metadata->next;
free(metadata->filename);
free(metadata);
metadata = metadata_tmp; |
e3aaff8e |
} |
2b259453 |
cli_dbgmsg("RAR: Exit code: %d\n", ret); |
7761c6eb |
|
e3aaff8e |
return ret;
}
|
9d96e4b6 |
static int cli_scanarj(int desc, cli_ctx *ctx, off_t sfx_offset, uint32_t *sfx_check)
{
int ret = CL_CLEAN, rc;
arj_metadata_t metadata;
char *dir;
cli_dbgmsg("in cli_scanarj()\n");
/* generate the temporary directory */ |
33068e09 |
if(!(dir = cli_gentemp(ctx->engine->tmpdir))) |
5fc380f1 |
return CL_EMEM;
|
9d96e4b6 |
if(mkdir(dir, 0700)) { |
b865e44a |
cli_dbgmsg("ARJ: Can't create temporary directory %s\n", dir); |
9d96e4b6 |
free(dir);
return CL_ETMPDIR;
}
if(sfx_offset)
lseek(desc, sfx_offset, SEEK_SET);
ret = cli_unarj_open(desc, dir);
if (ret != CL_SUCCESS) { |
33068e09 |
if(!ctx->engine->keeptmp) |
9d96e4b6 |
cli_rmdirs(dir);
free(dir);
cli_dbgmsg("ARJ: Error: %s\n", cl_strerror(ret));
return ret;
}
metadata.filename = NULL;
do {
ret = cli_unarj_prepare_file(desc, dir, &metadata);
if (ret != CL_SUCCESS) {
break;
} |
d91ab809 |
if ((ret = cli_checklimits("ARJ", ctx, metadata.orig_size, metadata.comp_size, 0))!=CL_CLEAN) {
ret = CL_SUCCESS;
continue; |
9d96e4b6 |
}
ret = cli_unarj_extract_file(desc, dir, &metadata);
if (metadata.ofd >= 0) {
lseek(metadata.ofd, 0, SEEK_SET);
rc = cli_magic_scandesc(metadata.ofd, ctx);
close(metadata.ofd);
if (rc == CL_VIRUS) {
cli_dbgmsg("ARJ: infected with %s\n",*ctx->virname);
ret = CL_VIRUS;
break;
}
}
if (metadata.filename) {
free(metadata.filename);
metadata.filename = NULL;
}
} while(ret == CL_SUCCESS);
|
33068e09 |
if(!ctx->engine->keeptmp) |
9d96e4b6 |
cli_rmdirs(dir);
free(dir);
if (metadata.filename) {
free(metadata.filename);
}
cli_dbgmsg("ARJ: Exit code: %d\n", ret); |
9f851a24 |
if (ret == CL_BREAK)
ret = CL_CLEAN; |
9d96e4b6 |
return ret;
} |
e3aaff8e |
|
3c91998b |
static int cli_scangzip(int desc, cli_ctx *ctx) |
e3aaff8e |
{
int fd, bytes, ret = CL_CLEAN; |
33f89aa5 |
unsigned long int size = 0; |
f7148839 |
char *buff; |
0e621e7d |
char *tmpname; |
e3aaff8e |
gzFile gd;
|
fc56deed |
cli_dbgmsg("in cli_scangzip()\n");
|
e3aaff8e |
if((gd = gzdopen(dup(desc), "rb")) == NULL) { |
2b259453 |
cli_dbgmsg("GZip: Can't open descriptor %d\n", desc); |
871177cd |
return CL_EOPEN; |
e3aaff8e |
}
|
33068e09 |
if((ret = cli_gentempfd(ctx->engine->tmpdir, &tmpname, &fd))) { |
2b259453 |
cli_dbgmsg("GZip: Can't generate temporary file.\n"); |
e3aaff8e |
gzclose(gd); |
a7ac5978 |
return ret; |
e3aaff8e |
}
|
fc56deed |
if(!(buff = (char *) cli_malloc(FILEBUFF))) { |
794f3f23 |
cli_dbgmsg("GZip: Unable to malloc %u bytes.\n", FILEBUFF); |
fc56deed |
gzclose(gd); |
a7ac5978 |
close(fd); |
33068e09 |
if(!ctx->engine->keeptmp) { |
997a0e0b |
if(cli_unlink(tmpname)) {
free(tmpname); |
871177cd |
return CL_EUNLINK; |
997a0e0b |
}
} |
f7148839 |
return CL_EMEM; |
fc56deed |
} |
f7148839 |
|
fc56deed |
while((bytes = gzread(gd, buff, FILEBUFF)) > 0) { |
e3aaff8e |
size += bytes;
|
d91ab809 |
if(cli_checklimits("GZip", ctx, size + FILEBUFF, 0, 0)!=CL_CLEAN)
break; |
e3aaff8e |
|
4152ad50 |
if(cli_writen(fd, buff, bytes) != bytes) { |
2b259453 |
cli_dbgmsg("GZip: Can't write to file.\n"); |
a7ac5978 |
close(fd); |
33068e09 |
if(!ctx->engine->keeptmp) { |
997a0e0b |
if (cli_unlink(tmpname)) {
free(tmpname);
gzclose(gd);
free(buff); |
871177cd |
return CL_EUNLINK; |
997a0e0b |
}
} |
0e621e7d |
free(tmpname); |
e3aaff8e |
gzclose(gd); |
f7148839 |
free(buff); |
871177cd |
return CL_EWRITE; |
e3aaff8e |
}
}
|
f7148839 |
free(buff); |
e3aaff8e |
gzclose(gd); |
985d9958 |
if(ret == CL_VIRUS) { |
a7ac5978 |
close(fd); |
33068e09 |
if(!ctx->engine->keeptmp) |
871177cd |
if (cli_unlink(tmpname)) ret = CL_EUNLINK; |
0e621e7d |
free(tmpname); |
985d9958 |
return ret;
}
|
e3aaff8e |
lseek(fd, 0, SEEK_SET); |
3c91998b |
if((ret = cli_magic_scandesc(fd, ctx)) == CL_VIRUS ) {
cli_dbgmsg("GZip: Infected with %s\n", *ctx->virname); |
a7ac5978 |
close(fd); |
33068e09 |
if(!ctx->engine->keeptmp) { |
997a0e0b |
if (cli_unlink(tmpname)) {
free(tmpname); |
871177cd |
return CL_EUNLINK; |
997a0e0b |
}
} |
0e621e7d |
free(tmpname); |
e3aaff8e |
return CL_VIRUS;
} |
a7ac5978 |
close(fd); |
33068e09 |
if(!ctx->engine->keeptmp) |
871177cd |
if (cli_unlink(tmpname)) ret = CL_EUNLINK; |
0e621e7d |
free(tmpname); |
e3aaff8e |
return ret;
}
|
de472237 |
#ifndef HAVE_BZLIB_H
static int cli_scanbzip(int desc, cli_ctx *ctx) {
cli_warnmsg("cli_scanbzip: bzip2 support not compiled in\n");
return CL_CLEAN;
}
#else |
e3aaff8e |
#ifdef NOBZ2PREFIX
#define BZ2_bzReadOpen bzReadOpen
#define BZ2_bzReadClose bzReadClose
#define BZ2_bzRead bzRead
#endif
|
3c91998b |
static int cli_scanbzip(int desc, cli_ctx *ctx) |
e3aaff8e |
{
int fd, bytes, ret = CL_CLEAN, bzerror = 0; |
33f89aa5 |
unsigned long int size = 0; |
f7148839 |
char *buff; |
a7ac5978 |
FILE *fs; |
0e621e7d |
char *tmpname; |
e3aaff8e |
BZFILE *bfd;
|
9e431a95 |
if((fs = fdopen(dup(desc), "rb")) == NULL) { |
2b259453 |
cli_dbgmsg("Bzip: Can't open descriptor %d.\n", desc); |
871177cd |
return CL_EOPEN; |
e3aaff8e |
}
|
724b2bf7 |
if((bfd = BZ2_bzReadOpen(&bzerror, fs, 0, 0, NULL, 0)) == NULL) { |
2b259453 |
cli_dbgmsg("Bzip: Can't initialize bzip2 library (descriptor: %d).\n", desc); |
9e431a95 |
fclose(fs); |
871177cd |
return CL_EOPEN; |
e3aaff8e |
}
|
33068e09 |
if((ret = cli_gentempfd(ctx->engine->tmpdir, &tmpname, &fd))) { |
2b259453 |
cli_dbgmsg("Bzip: Can't generate temporary file.\n"); |
e3aaff8e |
BZ2_bzReadClose(&bzerror, bfd); |
9e431a95 |
fclose(fs); |
a7ac5978 |
return ret; |
e3aaff8e |
}
|
cd69cf20 |
if(!(buff = (char *) cli_malloc(FILEBUFF))) {
cli_dbgmsg("Bzip: Unable to malloc %u bytes.\n", FILEBUFF); |
a7ac5978 |
close(fd); |
33068e09 |
if(!ctx->engine->keeptmp) { |
997a0e0b |
if (cli_unlink(tmpname)) {
free(tmpname);
fclose(fs);
BZ2_bzReadClose(&bzerror, bfd); |
871177cd |
return CL_EUNLINK; |
997a0e0b |
}
} |
0e621e7d |
free(tmpname); |
9e431a95 |
fclose(fs);
BZ2_bzReadClose(&bzerror, bfd); |
f7148839 |
return CL_EMEM; |
9e431a95 |
} |
f7148839 |
|
fc56deed |
while((bytes = BZ2_bzRead(&bzerror, bfd, buff, FILEBUFF)) > 0) { |
e3aaff8e |
size += bytes;
|
d91ab809 |
if(cli_checklimits("Bzip", ctx, size + FILEBUFF, 0, 0)!=CL_CLEAN)
break; |
e3aaff8e |
|
4152ad50 |
if(cli_writen(fd, buff, bytes) != bytes) { |
2b259453 |
cli_dbgmsg("Bzip: Can't write to file.\n"); |
e3aaff8e |
BZ2_bzReadClose(&bzerror, bfd); |
a7ac5978 |
close(fd); |
33068e09 |
if(!ctx->engine->keeptmp) { |
997a0e0b |
if (cli_unlink(tmpname)) {
free(tmpname);
free(buff);
fclose(fs); |
871177cd |
return CL_EUNLINK; |
997a0e0b |
}
} |
0e621e7d |
free(tmpname); |
f7148839 |
free(buff); |
9e431a95 |
fclose(fs); |
871177cd |
return CL_EWRITE; |
e3aaff8e |
}
}
|
f7148839 |
free(buff); |
e3aaff8e |
BZ2_bzReadClose(&bzerror, bfd); |
985d9958 |
if(ret == CL_VIRUS) { |
a7ac5978 |
close(fd); |
33068e09 |
if(!ctx->engine->keeptmp) |
871177cd |
if (cli_unlink(tmpname)) ret = CL_EUNLINK; |
0e621e7d |
free(tmpname); |
985d9958 |
fclose(fs);
return ret;
}
|
e3aaff8e |
lseek(fd, 0, SEEK_SET); |
3c91998b |
if((ret = cli_magic_scandesc(fd, ctx)) == CL_VIRUS ) {
cli_dbgmsg("Bzip: Infected with %s\n", *ctx->virname); |
e3aaff8e |
} |
a7ac5978 |
close(fd); |
33068e09 |
if(!ctx->engine->keeptmp) |
871177cd |
if (cli_unlink(tmpname)) ret = CL_EUNLINK; |
0e621e7d |
free(tmpname); |
9e431a95 |
fclose(fs); |
e3aaff8e |
return ret;
}
#endif
|
3c91998b |
static int cli_scanszdd(int desc, cli_ctx *ctx) |
341e5433 |
{ |
6e47a652 |
int ofd, ret; |
0e621e7d |
char *tmpname; |
341e5433 |
|
2b259453 |
|
5da612a4 |
cli_dbgmsg("in cli_scanszdd()\n");
|
33068e09 |
if((ret = cli_gentempfd(ctx->engine->tmpdir, &tmpname, &ofd))) { |
6e47a652 |
cli_dbgmsg("MSEXPAND: Can't generate temporary file/descriptor\n");
return ret; |
341e5433 |
}
|
6e47a652 |
lseek(desc, 0, SEEK_SET);
ret = cli_msexpand(desc, ofd, ctx); |
341e5433 |
|
6e47a652 |
if(ret != CL_SUCCESS) { /* CL_VIRUS or some error */
close(ofd); |
33068e09 |
if(!ctx->engine->keeptmp) |
871177cd |
if (cli_unlink(tmpname)) ret = CL_EUNLINK; |
0e621e7d |
free(tmpname); |
6e47a652 |
return ret; |
341e5433 |
}
|
6e47a652 |
cli_dbgmsg("MSEXPAND: Decompressed into %s\n", tmpname);
lseek(ofd, 0, SEEK_SET);
ret = cli_magic_scandesc(ofd, ctx);
close(ofd); |
33068e09 |
if(!ctx->engine->keeptmp) |
871177cd |
if (cli_unlink(tmpname)) ret = CL_EUNLINK; |
0e621e7d |
free(tmpname); |
6e47a652 |
|
341e5433 |
return ret;
}
|
d8a5c616 |
static int cli_scanmscab(int desc, cli_ctx *ctx, off_t sfx_offset) |
414abe87 |
{
char *tempname; |
24fd05e1 |
int ret;
unsigned int files = 0;
struct cab_archive cab;
struct cab_file *file; |
414abe87 |
cli_dbgmsg("in cli_scanmscab()\n");
|
24fd05e1 |
if((ret = cab_open(desc, sfx_offset, &cab)))
return ret; |
414abe87 |
|
24fd05e1 |
for(file = cab.files; file; file = file->next) {
files++; |
52ab3176 |
|
33068e09 |
if(!(tempname = cli_gentemp(ctx->engine->tmpdir))) { |
5fc380f1 |
ret = CL_EMEM;
break;
} |
8df99a92 |
if(ctx->engine->maxscansize && ctx->scansize >= ctx->engine->maxscansize) {
ret = CL_CLEAN;
break;
}
if(ctx->engine->maxscansize && ctx->scansize + ctx->engine->maxfilesize >= ctx->engine->maxscansize)
file->max_size = ctx->engine->maxscansize - ctx->scansize; |
24fd05e1 |
else |
8df99a92 |
file->max_size = ctx->engine->maxfilesize; |
24fd05e1 |
|
8df99a92 |
cli_dbgmsg("CAB: Extracting file %s to %s, size %u, max_size: %u\n", file->name, tempname, file->length, (unsigned int) file->max_size);
file->written_size = 0;
if((ret = cab_extract(file, tempname))) {
cli_dbgmsg("CAB: Failed to extract file: %s\n", cl_strerror(ret));
} else {
if(file->length != file->written_size)
cli_dbgmsg("CAB: Length from header %u but wrote %u bytes\n", (unsigned int) file->length, (unsigned int) file->written_size);
ret = cli_scanfile(tempname, ctx);
} |
33068e09 |
if(!ctx->engine->keeptmp) { |
997a0e0b |
if (cli_unlink(tempname)) {
free(tempname); |
871177cd |
ret = CL_EUNLINK; |
997a0e0b |
break;
}
} |
24fd05e1 |
free(tempname); |
414abe87 |
if(ret == CL_VIRUS)
break;
}
|
24fd05e1 |
cab_free(&cab); |
414abe87 |
return ret;
}
|
72ce4b70 |
static int cli_vba_scandir(const char *dirname, cli_ctx *ctx, struct uniq *U) |
e3aaff8e |
{ |
937ade08 |
int ret = CL_CLEAN, i, j, fd, data_len; |
467f8b1e |
vba_project_t *vba_project; |
e3aaff8e |
DIR *dd;
struct dirent *dent; |
72a1b240 |
#if defined(HAVE_READDIR_R_3) || defined(HAVE_READDIR_R_2) |
88794204 |
union {
struct dirent d;
char b[offsetof(struct dirent, d_name) + NAME_MAX + 1];
} result; |
2bb229f6 |
#endif |
e3aaff8e |
struct stat statbuf; |
72ce4b70 |
char *fullname, vbaname[1024]; |
467f8b1e |
unsigned char *data; |
937ade08 |
char *hash;
uint32_t hashcnt; |
467f8b1e |
|
2b259453 |
cli_dbgmsg("VBADir: %s\n", dirname); |
72ce4b70 |
hashcnt = uniq_get(U, "_vba_project", 12, NULL);
while(hashcnt--) {
if(!(vba_project = (vba_project_t *)cli_vba_readdir(dirname, U, hashcnt))) continue; |
e3aaff8e |
|
467f8b1e |
for(i = 0; i < vba_project->count; i++) { |
937ade08 |
for(j = 0; (unsigned int)j < vba_project->colls[i]; j++) { |
58481352 |
snprintf(vbaname, 1024, "%s"PATHSEP"%s_%u", vba_project->dir, vba_project->name[i], j); |
72ce4b70 |
vbaname[sizeof(vbaname)-1] = '\0';
fd = open(vbaname, O_RDONLY|O_BINARY);
if(fd == -1) continue; |
937ade08 |
cli_dbgmsg("VBADir: Decompress VBA project '%s_%u'\n", vba_project->name[i], j); |
72ce4b70 |
data = (unsigned char *)cli_vba_inflate(fd, vba_project->offset[i], &data_len);
close(fd); |
cedc2d2a |
|
72ce4b70 |
if(!data) { |
937ade08 |
cli_dbgmsg("VBADir: WARNING: VBA project '%s_%u' decompressed to NULL\n", vba_project->name[i], j); |
72ce4b70 |
} else {
/* cli_dbgmsg("Project content:\n%s", data); */
if(ctx->scanned)
*ctx->scanned += data_len / CL_COUNT_PRECISION; |
e06afe8e |
if(cli_scanbuff(data, data_len, 0, ctx, CL_TYPE_MSOLE2, NULL) == CL_VIRUS) { |
72ce4b70 |
free(data);
ret = CL_VIRUS;
break;
} |
467f8b1e |
free(data);
}
}
}
free(vba_project->name); |
72ce4b70 |
free(vba_project->colls); |
467f8b1e |
free(vba_project->dir);
free(vba_project->offset);
free(vba_project); |
72ce4b70 |
if (ret == CL_VIRUS) break;
}
if(ret == CL_CLEAN && (hashcnt = uniq_get(U, "powerpoint document", 19, &hash))) {
while(hashcnt--) { |
58481352 |
snprintf(vbaname, 1024, "%s"PATHSEP"%s_%u", dirname, hash, hashcnt); |
72ce4b70 |
vbaname[sizeof(vbaname)-1] = '\0';
fd = open(vbaname, O_RDONLY|O_BINARY);
if (fd == -1) continue; |
33068e09 |
if ((fullname = cli_ppt_vba_read(fd, ctx))) { |
cb680655 |
if(cli_scandir(fullname, ctx) == CL_VIRUS) { |
72ce4b70 |
ret = CL_VIRUS; |
2e53806b |
} |
33068e09 |
if(!ctx->engine->keeptmp) |
72ce4b70 |
cli_rmdirs(fullname); |
2e53806b |
free(fullname); |
72ce4b70 |
}
close(fd);
}
}
if (ret == CL_CLEAN && (hashcnt = uniq_get(U, "worddocument", 12, &hash))) {
while(hashcnt--) { |
58481352 |
snprintf(vbaname, sizeof(vbaname), "%s"PATHSEP"%s_%u", dirname, hash, hashcnt); |
72ce4b70 |
vbaname[sizeof(vbaname)-1] = '\0';
fd = open(vbaname, O_RDONLY|O_BINARY);
if (fd == -1) continue;
if (!(vba_project = (vba_project_t *)cli_wm_readdir(fd))) { |
2e53806b |
close(fd); |
72ce4b70 |
continue;
}
for (i = 0; i < vba_project->count; i++) {
cli_dbgmsg("VBADir: Decompress WM project macro:%d key:%d length:%d\n", i, vba_project->key[i], vba_project->length[i]);
data = (unsigned char *)cli_wm_decrypt_macro(fd, vba_project->offset[i], vba_project->length[i], vba_project->key[i]); |
2e53806b |
if(!data) { |
2b259453 |
cli_dbgmsg("VBADir: WARNING: WM project '%s' macro %d decrypted to NULL\n", vba_project->name[i], i); |
2e53806b |
} else { |
72ce4b70 |
cli_dbgmsg("Project content:\n%s", data); |
3c91998b |
if(ctx->scanned)
*ctx->scanned += vba_project->length[i] / CL_COUNT_PRECISION; |
e06afe8e |
if(cli_scanbuff(data, vba_project->length[i], 0, ctx, CL_TYPE_MSOLE2, NULL) == CL_VIRUS) { |
2e53806b |
free(data);
ret = CL_VIRUS;
break;
}
free(data);
} |
72ce4b70 |
}
close(fd);
free(vba_project->name);
free(vba_project->colls);
free(vba_project->dir);
free(vba_project->offset);
free(vba_project->key);
free(vba_project->length);
free(vba_project);
if(ret == CL_VIRUS) break; |
2e53806b |
} |
467f8b1e |
} |
cd69cf20 |
|
467f8b1e |
if(ret != CL_CLEAN)
return ret; |
e3aaff8e |
|
892d2f56 |
/* Check directory for embedded OLE objects */ |
72ce4b70 |
hashcnt = uniq_get(U, "_1_ole10native", 14, &hash);
while(hashcnt--) { |
58481352 |
snprintf(vbaname, sizeof(vbaname), "%s"PATHSEP"%s_%u", dirname, hash, hashcnt); |
72ce4b70 |
vbaname[sizeof(vbaname)-1] = '\0';
fd = open(vbaname, O_RDONLY|O_BINARY);
if (fd >= 0) {
ret = cli_scan_ole10(fd, ctx);
close(fd);
if(ret != CL_CLEAN)
return ret; |
892d2f56 |
}
}
|
72ce4b70 |
/* ACAB: since we now hash filenames and handle collisions we
* could avoid recursion by removing the block below and by
* flattening the paths in ole2_walk_property_tree (case 1) */
|
e3aaff8e |
if((dd = opendir(dirname)) != NULL) { |
72a1b240 |
#ifdef HAVE_READDIR_R_3 |
88794204 |
while(!readdir_r(dd, &result.d, &dent) && dent) { |
72a1b240 |
#elif defined(HAVE_READDIR_R_2) |
88794204 |
while((dent = (struct dirent *) readdir_r(dd, &result.d))) { |
72a1b240 |
#else |
e3aaff8e |
while((dent = readdir(dd))) { |
72a1b240 |
#endif |
feeaa333 |
if(dent->d_ino)
{ |
e3aaff8e |
if(strcmp(dent->d_name, ".") && strcmp(dent->d_name, "..")) {
/* build the full name */ |
72ce4b70 |
fullname = cli_malloc(strlen(dirname) + strlen(dent->d_name) + 2);
if(!fullname) { |
cd69cf20 |
ret = CL_EMEM;
break;
} |
58481352 |
sprintf(fullname, "%s"PATHSEP"%s", dirname, dent->d_name); |
e3aaff8e |
/* stat the file */ |
72ce4b70 |
if(lstat(fullname, &statbuf) != -1) { |
e3aaff8e |
if(S_ISDIR(statbuf.st_mode) && !S_ISLNK(statbuf.st_mode)) |
72ce4b70 |
if (cli_vba_scandir(fullname, ctx, U) == CL_VIRUS) { |
467f8b1e |
ret = CL_VIRUS; |
72ce4b70 |
free(fullname); |
467f8b1e |
break;
} |
e3aaff8e |
} |
72ce4b70 |
free(fullname); |
e3aaff8e |
}
}
}
} else { |
2b259453 |
cli_dbgmsg("VBADir: Can't open directory %s.\n", dirname); |
e3aaff8e |
return CL_EOPEN;
}
closedir(dd); |
467f8b1e |
return ret;
}
|
3c91998b |
static int cli_scanhtml(int desc, cli_ctx *ctx) |
a92110df |
{
char *tempname, fullname[1024];
int ret=CL_CLEAN, fd; |
572a986c |
struct stat sb; |
a92110df |
cli_dbgmsg("in cli_scanhtml()\n");
|
572a986c |
if(fstat(desc, &sb) == -1) {
cli_errmsg("cli_scanhtml: fstat() failed for descriptor %d\n", desc); |
871177cd |
return CL_ESTAT; |
572a986c |
}
/* Because HTML detection is FP-prone and html_normalise_fd() needs to
* mmap the file don't normalise files larger than 10 MB.
*/ |
08f0150f |
|
572a986c |
if(sb.st_size > 10485760) {
cli_dbgmsg("cli_scanhtml: exiting (file larger than 10 MB)\n");
return CL_CLEAN;
}
|
33068e09 |
if(!(tempname = cli_gentemp(ctx->engine->tmpdir))) |
5fc380f1 |
return CL_EMEM;
|
a92110df |
if(mkdir(tempname, 0700)) { |
572a986c |
cli_errmsg("cli_scanhtml: Can't create temporary directory %s\n", tempname); |
f0bc32bd |
free(tempname); |
a92110df |
return CL_ETMPDIR;
}
|
5f2fa151 |
cli_dbgmsg("cli_scanhtml: using tempdir %s\n", tempname);
|
462e8e5e |
html_normalise_fd(desc, tempname, NULL, ctx->dconf); |
58481352 |
snprintf(fullname, 1024, "%s"PATHSEP"nocomment.html", tempname); |
b58fdfc2 |
fd = open(fullname, O_RDONLY|O_BINARY); |
a92110df |
if (fd >= 0) { |
6038397e |
ret = cli_scandesc(fd, ctx, CL_TYPE_HTML, 0, NULL, AC_SCAN_VIR); |
a92110df |
close(fd);
}
|
08f0150f |
if(ret == CL_CLEAN && sb.st_size < 2097152) {
/* limit to 2 MB, we're not interesting in scanning large files in notags form */
/* TODO: don't even create notags if file is over 2 MB */ |
58481352 |
snprintf(fullname, 1024, "%s"PATHSEP"notags.html", tempname); |
0664128a |
fd = open(fullname, O_RDONLY|O_BINARY);
if(fd >= 0) { |
6038397e |
ret = cli_scandesc(fd, ctx, CL_TYPE_HTML, 0, NULL, AC_SCAN_VIR); |
0664128a |
close(fd);
} |
a92110df |
}
|
8be1d5a4 |
if(ret == CL_CLEAN) { |
58481352 |
snprintf(fullname, 1024, "%s"PATHSEP"javascript", tempname); |
8be1d5a4 |
fd = open(fullname, O_RDONLY|O_BINARY);
if(fd >= 0) { |
3434c9ba |
ret = cli_scandesc(fd, ctx, CL_TYPE_HTML, 0, NULL, AC_SCAN_VIR); |
ffe6231f |
if (ret == CL_CLEAN) {
lseek(fd, 0, SEEK_SET);
ret = cli_scandesc(fd, ctx, CL_TYPE_TEXT_ASCII, 0, NULL, AC_SCAN_VIR);
} |
8be1d5a4 |
close(fd);
}
}
|
a92110df |
if (ret == CL_CLEAN) { |
58481352 |
snprintf(fullname, 1024, "%s"PATHSEP"rfc2397", tempname); |
cb680655 |
ret = cli_scandir(fullname, ctx); |
a92110df |
}
|
33068e09 |
if(!ctx->engine->keeptmp) |
a92110df |
cli_rmdirs(tempname);
free(tempname);
return ret;
}
|
015ce4a8 |
static int cli_scanscript(int desc, cli_ctx *ctx)
{
unsigned char buff[FILEBUFF]; |
2a138cc5 |
unsigned char* normalized; |
015ce4a8 |
struct text_norm_state state;
struct stat sb;
char *tmpname = NULL;
int ofd = -1, ret;
ssize_t nread; |
c4934f41 |
const struct cli_matcher *troot = ctx->engine->root[7]; |
e06afe8e |
uint32_t maxpatlen = troot ? troot->maxpatlen : 0, offset = 0; |
c4934f41 |
struct cli_matcher *groot = ctx->engine->root[0];
struct cli_ac_data gmdata, tmdata;
struct cli_ac_data *mdata[2]; |
015ce4a8 |
|
2a138cc5 |
cli_dbgmsg("in cli_scanscript()\n"); |
015ce4a8 |
if(fstat(desc, &sb) == -1) {
cli_errmsg("cli_scanscript: fstat() failed for descriptor %d\n", desc); |
871177cd |
return CL_ESTAT; |
015ce4a8 |
}
/* don't normalize files that are too large */ |
3a094ba0 |
if(sb.st_size > 5242880) {
cli_dbgmsg("cli_scanscript: exiting (file larger than 5 MB)\n"); |
015ce4a8 |
return CL_CLEAN;
}
/* dump to disk only if explicitly asked to,
* otherwise we can process just in-memory */ |
33068e09 |
if(ctx->engine->keeptmp) {
if((ret = cli_gentempfd(ctx->engine->tmpdir, &tmpname, &ofd))) { |
015ce4a8 |
cli_dbgmsg("cli_scanscript: Can't generate temporary file/descriptor\n");
return ret;
}
}
|
2865ac2b |
if(!(normalized = cli_malloc(SCANBUFF + maxpatlen))) { |
2a138cc5 |
cli_dbgmsg("cli_scanscript: Unable to malloc %u bytes\n", SCANBUFF);
return CL_EMEM;
}
|
2865ac2b |
text_normalize_init(&state, normalized, SCANBUFF + maxpatlen); |
015ce4a8 |
ret = CL_CLEAN;
|
aca9ea82 |
if ((ret = cli_ac_initdata(&tmdata, troot->ac_partsigs, troot->ac_lsigs, troot->ac_reloff_num, CLI_DEFAULT_AC_TRACKLEN))) |
c4934f41 |
return ret;
|
aca9ea82 |
if ((ret = cli_ac_initdata(&gmdata, groot->ac_partsigs, groot->ac_lsigs, groot->ac_reloff_num, CLI_DEFAULT_AC_TRACKLEN))) { |
c4934f41 |
cli_ac_freedata(&tmdata);
return ret;
}
mdata[0] = &tmdata;
mdata[1] = &gmdata;
|
015ce4a8 |
do {
nread = cli_readn(desc, buff, sizeof(buff));
if(nread <= 0 || state.out_pos + nread > state.out_len) {
/* flush if error/EOF, or too little buffer space left */
if((ofd != -1) && (write(ofd, state.out, state.out_pos) == -1)) {
cli_errmsg("cli_scanscript: can't write to file %s\n",tmpname);
close(ofd);
ofd = -1;
/* we can continue to scan in memory */
}
/* when we flush the buffer also scan */ |
e06afe8e |
if(cli_scanbuff(state.out, state.out_pos, offset, ctx, CL_TYPE_TEXT_ASCII, mdata) == CL_VIRUS) { |
015ce4a8 |
ret = CL_VIRUS;
break;
} |
e06afe8e |
if(ctx->scanned)
*ctx->scanned += state.out_pos / CL_COUNT_PRECISION;
offset += state.out_pos; |
2865ac2b |
/* carry over maxpatlen from previous buffer */
if (state.out_pos > maxpatlen) |
cfd6bc26 |
memmove(state.out, state.out + state.out_pos - maxpatlen, maxpatlen); |
015ce4a8 |
text_normalize_reset(&state); |
2865ac2b |
state.out_pos = maxpatlen; |
015ce4a8 |
} |
0664128a |
if(nread > 0 && (text_normalize_buffer(&state, buff, nread) != nread)) { |
015ce4a8 |
cli_dbgmsg("cli_scanscript: short read during normalizing\n");
}
/* used a do {}while() here, since we need to flush our buffers at the end,
* and using while(){} loop would mean code duplication */
} while (nread > 0);
|
c4934f41 |
cli_ac_freedata(&tmdata);
cli_ac_freedata(&gmdata); |
33068e09 |
if(ctx->engine->keeptmp) { |
015ce4a8 |
free(tmpname);
close(ofd);
} |
2a138cc5 |
free(normalized); |
015ce4a8 |
return ret;
}
|
bd988961 |
static int cli_scanhtml_utf16(int desc, cli_ctx *ctx)
{
char *tempname, buff[512], *decoded;
int ret = CL_CLEAN, fd, bytes;
cli_dbgmsg("in cli_scanhtml_utf16()\n");
|
33068e09 |
if(!(tempname = cli_gentemp(ctx->engine->tmpdir))) |
5fc380f1 |
return CL_EMEM;
|
bd988961 |
if((fd = open(tempname, O_RDWR|O_CREAT|O_TRUNC|O_BINARY, S_IRWXU)) < 0) {
cli_errmsg("cli_scanhtml_utf16: Can't create file %s\n", tempname);
free(tempname); |
871177cd |
return CL_EOPEN; |
bd988961 |
}
|
5f2fa151 |
cli_dbgmsg("cli_scanhtml_utf16: using tempfile %s\n", tempname);
|
bd988961 |
while((bytes = read(desc, buff, sizeof(buff))) > 0) {
decoded = cli_utf16toascii(buff, bytes);
if(decoded) {
if(write(fd, decoded, strlen(decoded)) == -1) {
cli_errmsg("cli_scanhtml_utf16: Can't write to file %s\n", tempname);
free(decoded); |
401ea243 |
close(fd); |
c0a95e0c |
cli_unlink(tempname); |
bd988961 |
free(tempname); |
871177cd |
return CL_EWRITE; |
bd988961 |
}
free(decoded);
}
}
lseek(fd, 0, SEEK_SET);
ret = cli_scanhtml(fd, ctx);
close(fd);
|
33068e09 |
if(!ctx->engine->keeptmp) { |
871177cd |
if (cli_unlink(tempname)) ret = CL_EUNLINK; |
62ae31f3 |
} else |
bd988961 |
cli_dbgmsg("cli_scanhtml_utf16: Decoded HTML data saved in %s\n", tempname);
free(tempname);
return ret;
}
|
3c91998b |
static int cli_scanole2(int desc, cli_ctx *ctx) |
467f8b1e |
{ |
56bfccb2 |
char *dir;
int ret = CL_CLEAN; |
72ce4b70 |
struct uniq *vba = NULL; |
2b259453 |
|
467f8b1e |
cli_dbgmsg("in cli_scanole2()\n");
|
724b2bf7 |
if(ctx->engine->maxreclevel && ctx->recursion >= ctx->engine->maxreclevel) |
bbd6ca3f |
return CL_EMAXREC;
|
467f8b1e |
/* generate the temporary directory */ |
33068e09 |
if(!(dir = cli_gentemp(ctx->engine->tmpdir))) |
5fc380f1 |
return CL_EMEM;
|
467f8b1e |
if(mkdir(dir, 0700)) { |
2b259453 |
cli_dbgmsg("OLE2: Can't create temporary directory %s\n", dir); |
f0bc32bd |
free(dir); |
467f8b1e |
return CL_ETMPDIR;
}
|
72ce4b70 |
ret = cli_ole2_extract(desc, dir, ctx, &vba);
if(ret!=CL_CLEAN && ret!=CL_VIRUS) { |
2b259453 |
cli_dbgmsg("OLE2: %s\n", cl_strerror(ret)); |
33068e09 |
if(!ctx->engine->keeptmp) |
8d5e0ac0 |
cli_rmdirs(dir); |
467f8b1e |
free(dir);
return ret;
}
|
72ce4b70 |
if (vba) {
ctx->recursion++; |
bbd6ca3f |
|
72ce4b70 |
ret = cli_vba_scandir(dir, ctx, vba); |
53321a4c |
uniq_free(vba); |
72ce4b70 |
if(ret != CL_VIRUS) |
cb680655 |
if(cli_scandir(dir, ctx) == CL_VIRUS) |
72ce4b70 |
ret = CL_VIRUS;
ctx->recursion--; |
467f8b1e |
}
|
33068e09 |
if(!ctx->engine->keeptmp) |
8d5e0ac0 |
cli_rmdirs(dir); |
467f8b1e |
free(dir);
return ret; |
e3aaff8e |
}
|
3c91998b |
static int cli_scantar(int desc, cli_ctx *ctx, unsigned int posix) |
2b259453 |
{
char *dir;
int ret = CL_CLEAN;
cli_dbgmsg("in cli_scantar()\n");
/* generate temporary directory */ |
33068e09 |
if(!(dir = cli_gentemp(ctx->engine->tmpdir))) |
5fc380f1 |
return CL_EMEM;
|
2b259453 |
if(mkdir(dir, 0700)) {
cli_errmsg("Tar: Can't create temporary directory %s\n", dir); |
f0bc32bd |
free(dir); |
2b259453 |
return CL_ETMPDIR;
}
|
d0d1afd7 |
ret = cli_untar(dir, desc, posix, ctx); |
2b259453 |
|
33068e09 |
if(!ctx->engine->keeptmp) |
2b259453 |
cli_rmdirs(dir);
free(dir);
return ret;
}
|
3c91998b |
static int cli_scanbinhex(int desc, cli_ctx *ctx) |
667ab9c6 |
{
char *dir;
int ret = CL_CLEAN;
cli_dbgmsg("in cli_scanbinhex()\n");
/* generate temporary directory */ |
33068e09 |
if(!(dir = cli_gentemp(ctx->engine->tmpdir))) |
5fc380f1 |
return CL_EMEM; |
667ab9c6 |
if(mkdir(dir, 0700)) {
cli_errmsg("Binhex: Can't create temporary directory %s\n", dir); |
f0bc32bd |
free(dir); |
667ab9c6 |
return CL_ETMPDIR;
}
if((ret = cli_binhex(dir, desc)))
cli_dbgmsg("Binhex: %s\n", cl_strerror(ret));
else |
cb680655 |
ret = cli_scandir(dir, ctx); |
667ab9c6 |
|
33068e09 |
if(!ctx->engine->keeptmp) |
667ab9c6 |
cli_rmdirs(dir);
free(dir);
return ret;
}
|
3c91998b |
static int cli_scanmschm(int desc, cli_ctx *ctx) |
a5373b64 |
{ |
b865e44a |
int ret = CL_CLEAN, rc;
chm_metadata_t metadata;
char *dir; |
a5373b64 |
|
b865e44a |
cli_dbgmsg("in cli_scanmschm()\n"); |
a5373b64 |
|
b865e44a |
/* generate the temporary directory */ |
33068e09 |
if(!(dir = cli_gentemp(ctx->engine->tmpdir))) |
5fc380f1 |
return CL_EMEM;
|
b865e44a |
if(mkdir(dir, 0700)) {
cli_dbgmsg("CHM: Can't create temporary directory %s\n", dir);
free(dir); |
a5373b64 |
return CL_ETMPDIR;
}
|
8df99a92 |
ret = cli_chm_open(desc, dir, &metadata, ctx); |
b865e44a |
if (ret != CL_SUCCESS) { |
33068e09 |
if(!ctx->engine->keeptmp) |
b865e44a |
cli_rmdirs(dir);
free(dir);
cli_dbgmsg("CHM: Error: %s\n", cl_strerror(ret));
return ret;
}
do {
ret = cli_chm_prepare_file(desc, dir, &metadata);
if (ret != CL_SUCCESS) {
break;
} |
8df99a92 |
ret = cli_chm_extract_file(desc, dir, &metadata, ctx); |
b865e44a |
if (ret == CL_SUCCESS) {
lseek(metadata.ofd, 0, SEEK_SET);
rc = cli_magic_scandesc(metadata.ofd, ctx);
close(metadata.ofd);
if (rc == CL_VIRUS) {
cli_dbgmsg("CHM: infected with %s\n",*ctx->virname);
ret = CL_VIRUS;
break;
}
} |
a5373b64 |
|
b865e44a |
} while(ret == CL_SUCCESS); |
3c9e2d22 |
cli_chm_close(&metadata);
|
33068e09 |
if(!ctx->engine->keeptmp) |
b865e44a |
cli_rmdirs(dir);
free(dir);
cli_dbgmsg("CHM: Exit code: %d\n", ret);
if (ret == CL_BREAK)
ret = CL_CLEAN; |
a5373b64 |
return ret;
}
|
3c91998b |
static int cli_scanscrenc(int desc, cli_ctx *ctx) |
e57fa318 |
{
char *tempname;
int ret = CL_CLEAN;
cli_dbgmsg("in cli_scanscrenc()\n");
|
33068e09 |
if(!(tempname = cli_gentemp(ctx->engine->tmpdir))) |
5fc380f1 |
return CL_EMEM;
|
e57fa318 |
if(mkdir(tempname, 0700)) {
cli_dbgmsg("CHM: Can't create temporary directory %s\n", tempname); |
f0bc32bd |
free(tempname); |
e57fa318 |
return CL_ETMPDIR;
}
if (html_screnc_decode(desc, tempname)) |
cb680655 |
ret = cli_scandir(tempname, ctx); |
e57fa318 |
|
33068e09 |
if(!ctx->engine->keeptmp) |
e57fa318 |
cli_rmdirs(tempname);
free(tempname);
return ret;
} |
015e31e1 |
|
e4101980 |
static int cli_scanriff(int desc, cli_ctx *ctx) |
eb308794 |
{
int ret = CL_CLEAN;
if(cli_check_riff_exploit(desc) == 2) { |
e4101980 |
if(!cli_checkfp(desc, ctx)) {
ret = CL_VIRUS;
*ctx->virname = "Exploit.W32.MS05-002";
} |
eb308794 |
}
return ret;
}
|
be63d0ad |
static int cli_scanjpeg(int desc, cli_ctx *ctx) |
7afdc309 |
{
int ret = CL_CLEAN;
|
be63d0ad |
if(cli_check_jpeg_exploit(desc, ctx) == 1) { |
e4101980 |
if(!cli_checkfp(desc, ctx)) {
ret = CL_VIRUS;
*ctx->virname = "Exploit.W32.MS04-028";
} |
7afdc309 |
}
return ret;
}
|
3c91998b |
static int cli_scancryptff(int desc, cli_ctx *ctx) |
2c6f9d57 |
{ |
e12c29d2 |
int ret = CL_CLEAN, ndesc;
unsigned int length, i; |
2c6f9d57 |
unsigned char *src = NULL, *dest = NULL;
char *tempfile;
struct stat sb;
if(fstat(desc, &sb) == -1) { |
a687d96c |
cli_errmsg("CryptFF: Can't fstat descriptor %d\n", desc); |
871177cd |
return CL_ESTAT; |
2c6f9d57 |
}
/* Skip the CryptFF file header */
if(lseek(desc, 0x10, SEEK_SET) < 0) { |
a687d96c |
cli_errmsg("CryptFF: Can't lseek descriptor %d\n", desc); |
2c6f9d57 |
return ret;
}
length = sb.st_size - 0x10;
|
0d0fc120 |
if((dest = (unsigned char *) cli_malloc(length)) == NULL) { |
2c6f9d57 |
cli_dbgmsg("CryptFF: Can't allocate memory\n");
return CL_EMEM;
}
|
0d0fc120 |
if((src = (unsigned char *) cli_malloc(length)) == NULL) { |
2c6f9d57 |
cli_dbgmsg("CryptFF: Can't allocate memory\n");
free(dest);
return CL_EMEM;
}
if((unsigned int) read(desc, src, length) != length) {
cli_dbgmsg("CryptFF: Can't read from descriptor %d\n", desc);
free(dest);
free(src); |
871177cd |
return CL_EREAD; |
2c6f9d57 |
}
for(i = 0; i < length; i++)
dest[i] = src[i] ^ (unsigned char) 0xff;
free(src);
|
33068e09 |
if(!(tempfile = cli_gentemp(ctx->engine->tmpdir))) { |
5fc380f1 |
free(dest);
return CL_EMEM;
}
|
b58fdfc2 |
if((ndesc = open(tempfile, O_RDWR|O_CREAT|O_TRUNC|O_BINARY, S_IRWXU)) < 0) { |
2c6f9d57 |
cli_errmsg("CryptFF: Can't create file %s\n", tempfile);
free(dest);
free(tempfile); |
871177cd |
return CL_ECREAT; |
2c6f9d57 |
}
if(write(ndesc, dest, length) == -1) {
cli_dbgmsg("CryptFF: Can't write to descriptor %d\n", ndesc);
free(dest);
close(ndesc);
free(tempfile); |
871177cd |
return CL_EWRITE; |
2c6f9d57 |
}
free(dest);
lseek(ndesc, 0, SEEK_SET);
cli_dbgmsg("CryptFF: Scanning decrypted data\n");
|
3c91998b |
if((ret = cli_magic_scandesc(ndesc, ctx)) == CL_VIRUS)
cli_dbgmsg("CryptFF: Infected with %s\n", *ctx->virname); |
2c6f9d57 |
close(ndesc);
|
33068e09 |
if(ctx->engine->keeptmp) |
2c6f9d57 |
cli_dbgmsg("CryptFF: Decompressed data saved in %s\n", tempfile);
else |
871177cd |
if (cli_unlink(tempfile)) ret = CL_EUNLINK; |
2c6f9d57 |
free(tempfile);
return ret;
}
|
72ce4b70 |
static int cli_scanpdf(int desc, cli_ctx *ctx, off_t offset) |
798308de |
{
int ret; |
33068e09 |
char *dir = cli_gentemp(ctx->engine->tmpdir); |
798308de |
|
5fc380f1 |
if(!dir)
return CL_EMEM; |
798308de |
if(mkdir(dir, 0700)) {
cli_dbgmsg("Can't create temporary directory for PDF file %s\n", dir);
free(dir);
return CL_ETMPDIR;
}
|
72ce4b70 |
ret = cli_pdf(dir, desc, ctx, offset); |
798308de |
|
33068e09 |
if(!ctx->engine->keeptmp) |
798308de |
cli_rmdirs(dir);
free(dir);
return ret;
}
|
3c91998b |
static int cli_scantnef(int desc, cli_ctx *ctx) |
f0bc32bd |
{
int ret; |
33068e09 |
char *dir = cli_gentemp(ctx->engine->tmpdir); |
f0bc32bd |
|
5fc380f1 |
if(!dir)
return CL_EMEM; |
f0bc32bd |
if(mkdir(dir, 0700)) {
cli_dbgmsg("Can't create temporary directory for tnef file %s\n", dir);
free(dir);
return CL_ETMPDIR;
}
|
33068e09 |
ret = cli_tnef(dir, desc, ctx); |
f0bc32bd |
if(ret == CL_CLEAN) |
cb680655 |
ret = cli_scandir(dir, ctx); |
f0bc32bd |
|
33068e09 |
if(!ctx->engine->keeptmp) |
f0bc32bd |
cli_rmdirs(dir);
free(dir);
return ret;
}
|
3c91998b |
static int cli_scanuuencoded(int desc, cli_ctx *ctx) |
3953039b |
{
int ret; |
33068e09 |
char *dir = cli_gentemp(ctx->engine->tmpdir); |
3953039b |
|
5fc380f1 |
if(!dir)
return CL_EMEM;
|
3953039b |
if(mkdir(dir, 0700)) {
cli_dbgmsg("Can't create temporary directory for uuencoded file %s\n", dir);
free(dir);
return CL_ETMPDIR;
}
ret = cli_uuencode(dir, desc);
if(ret == CL_CLEAN) |
cb680655 |
ret = cli_scandir(dir, ctx); |
3953039b |
|
33068e09 |
if(!ctx->engine->keeptmp) |
3953039b |
cli_rmdirs(dir);
free(dir);
return ret;
}
|
3c91998b |
static int cli_scanmail(int desc, cli_ctx *ctx) |
e3aaff8e |
{
char *dir;
int ret;
|
d91ab809 |
cli_dbgmsg("Starting cli_scanmail(), recursion = %u\n", ctx->recursion); |
e3aaff8e |
|
0c7019c5 |
/* generate the temporary directory */ |
33068e09 |
if(!(dir = cli_gentemp(ctx->engine->tmpdir))) |
5fc380f1 |
return CL_EMEM;
|
0c7019c5 |
if(mkdir(dir, 0700)) {
cli_dbgmsg("Mail: Can't create temporary directory %s\n", dir);
free(dir);
return CL_ETMPDIR;
} |
e3aaff8e |
|
0c7019c5 |
/*
* Extract the attachments into the temporary directory
*/ |
0f7f7682 |
if((ret = cli_mbox(dir, desc, ctx))) { |
33068e09 |
if(!ctx->engine->keeptmp) |
8d5e0ac0 |
cli_rmdirs(dir); |
e3aaff8e |
free(dir);
return ret; |
0c7019c5 |
}
|
cb680655 |
ctx->container_type = CL_TYPE_MAIL;
ret = cli_scandir(dir, ctx);
ctx->container_type = 0; |
0c7019c5 |
|
33068e09 |
if(!ctx->engine->keeptmp) |
0c7019c5 |
cli_rmdirs(dir);
free(dir);
return ret; |
e3aaff8e |
}
|
a6e38800 |
static int cli_scan_structured(int desc, cli_ctx *ctx)
{
char buf[8192];
int result = 0;
unsigned int cc_count = 0;
unsigned int ssn_count = 0;
int done = 0;
int (*ccfunc)(const unsigned char *buffer, int length);
int (*ssnfunc)(const unsigned char *buffer, int length);
|
724b2bf7 |
if(ctx == NULL) |
a6e38800 |
return CL_ENULLARG;
|
724b2bf7 |
if(ctx->engine->min_cc_count == 1) |
a6e38800 |
ccfunc = dlp_has_cc;
else
ccfunc = dlp_get_cc_count;
|
26fbf6bd |
switch((ctx->options & CL_SCAN_STRUCTURED_SSN_NORMAL) | (ctx->options & CL_SCAN_STRUCTURED_SSN_STRIPPED)) { |
a6e38800 |
|
26fbf6bd |
case (CL_SCAN_STRUCTURED_SSN_NORMAL | CL_SCAN_STRUCTURED_SSN_STRIPPED): |
724b2bf7 |
if(ctx->engine->min_ssn_count == 1) |
a6e38800 |
ssnfunc = dlp_has_ssn;
else
ssnfunc = dlp_get_ssn_count;
break;
|
26fbf6bd |
case CL_SCAN_STRUCTURED_SSN_NORMAL: |
724b2bf7 |
if(ctx->engine->min_ssn_count == 1) |
a6e38800 |
ssnfunc = dlp_has_normal_ssn;
else
ssnfunc = dlp_get_normal_ssn_count;
break;
|
26fbf6bd |
case CL_SCAN_STRUCTURED_SSN_STRIPPED: |
724b2bf7 |
if(ctx->engine->min_ssn_count == 1) |
a6e38800 |
ssnfunc = dlp_has_stripped_ssn;
else
ssnfunc = dlp_get_stripped_ssn_count;
break; |
26fbf6bd |
default:
ssnfunc = NULL; |
a6e38800 |
}
|
26fbf6bd |
while(!done && ((result = cli_readn(desc, buf, 8191)) > 0)) { |
724b2bf7 |
if((cc_count += ccfunc((const unsigned char *)buf, result)) >= ctx->engine->min_cc_count) |
a6e38800 |
done = 1; |
26fbf6bd |
|
724b2bf7 |
if(ssnfunc && ((ssn_count += ssnfunc((const unsigned char *)buf, result)) >= ctx->engine->min_ssn_count)) |
a6e38800 |
done = 1;
}
|
724b2bf7 |
if(cc_count != 0 && cc_count >= ctx->engine->min_cc_count) { |
a6e38800 |
cli_dbgmsg("cli_scan_structured: %u credit card numbers detected\n", cc_count);
*ctx->virname = "Structured.CreditCardNumber"; |
e4101980 |
return cli_checkfp(desc, ctx) ? CL_CLEAN : CL_VIRUS; |
a6e38800 |
}
|
724b2bf7 |
if(ssn_count != 0 && ssn_count >= ctx->engine->min_ssn_count) { |
a6e38800 |
cli_dbgmsg("cli_scan_structured: %u social security numbers detected\n", ssn_count);
*ctx->virname = "Structured.SSN"; |
e4101980 |
return cli_checkfp(desc, ctx) ? CL_CLEAN : CL_VIRUS; |
a6e38800 |
}
return CL_CLEAN;
}
|
ee99255a |
static int cli_scanembpe(int desc, cli_ctx *ctx)
{
int fd, bytes, ret = CL_CLEAN;
unsigned long int size = 0;
char buff[512];
char *tmpname;
|
33068e09 |
tmpname = cli_gentemp(ctx->engine->tmpdir); |
ee99255a |
if(!tmpname)
return CL_EMEM;
if((fd = open(tmpname, O_RDWR|O_CREAT|O_TRUNC|O_BINARY, S_IRWXU)) < 0) {
cli_errmsg("cli_scanembpe: Can't create file %s\n", tmpname);
free(tmpname); |
871177cd |
return CL_ECREAT; |
ee99255a |
}
while((bytes = read(desc, buff, sizeof(buff))) > 0) {
size += bytes;
|
d91ab809 |
if(cli_checklimits("cli_scanembpe", ctx, size + sizeof(buff), 0, 0)!=CL_CLEAN) |
ee99255a |
break;
if(cli_writen(fd, buff, bytes) != bytes) {
cli_dbgmsg("cli_scanembpe: Can't write to temporary file\n");
close(fd); |
33068e09 |
if(!ctx->engine->keeptmp) { |
997a0e0b |
if (cli_unlink(tmpname)) {
free(tmpname); |
871177cd |
return CL_EUNLINK; |
997a0e0b |
}
} |
ee99255a |
free(tmpname); |
871177cd |
return CL_EWRITE; |
ee99255a |
}
}
|
f0f7f92f |
ctx->recursion++; |
ee99255a |
lseek(fd, 0, SEEK_SET);
if((ret = cli_magic_scandesc(fd, ctx)) == CL_VIRUS) {
cli_dbgmsg("cli_scanembpe: Infected with %s\n", *ctx->virname);
close(fd); |
33068e09 |
if(!ctx->engine->keeptmp) { |
997a0e0b |
if (cli_unlink(tmpname)) {
free(tmpname); |
871177cd |
return CL_EUNLINK; |
997a0e0b |
}
} |
ee99255a |
free(tmpname);
return CL_VIRUS;
} |
f0f7f92f |
ctx->recursion--; |
ee99255a |
close(fd); |
33068e09 |
if(!ctx->engine->keeptmp) { |
997a0e0b |
if (cli_unlink(tmpname)) {
free(tmpname); |
871177cd |
return CL_EUNLINK; |
997a0e0b |
}
} |
ee99255a |
free(tmpname);
/* intentionally ignore possible errors from cli_magic_scandesc */
return CL_CLEAN;
}
|
a810ba50 |
static int cli_scanraw(int desc, cli_ctx *ctx, cli_file_t type, uint8_t typercg, cli_file_t *dettype) |
555c5390 |
{ |
6191ee2c |
int ret = CL_CLEAN, nret = CL_CLEAN; |
555c5390 |
struct cli_matched_type *ftoffset = NULL, *fpt; |
994ae437 |
uint32_t lastzip, lastrar; |
ee99255a |
struct cli_exe_info peinfo; |
6038397e |
unsigned int acmode = AC_SCAN_VIR, break_loop = 0; |
198c851c |
struct stat sb; |
555c5390 |
|
8df99a92 |
if(ctx->engine->maxreclevel && ctx->recursion >= ctx->engine->maxreclevel)
return CL_EMAXREC;
if(typercg)
acmode |= AC_SCAN_FT; |
555c5390 |
if(lseek(desc, 0, SEEK_SET) < 0) {
cli_errmsg("cli_scanraw: lseek() failed\n"); |
871177cd |
return CL_ESEEK; |
555c5390 |
}
|
6038397e |
ret = cli_scandesc(desc, ctx, type == CL_TYPE_TEXT_ASCII ? 0 : type, 0, &ftoffset, acmode); |
555c5390 |
|
c8b0d9a2 |
if(ret >= CL_TYPENO) { |
8df99a92 |
ctx->recursion++; |
555c5390 |
|
d6bf90e6 |
/* |
c8f2d060 |
if(type == CL_TYPE_TEXT_ASCII) { |
ee99255a |
lseek(desc, 0, SEEK_SET);
nret = cli_scandesc(desc, ctx, 0, ret, 1, NULL);
if(nret == CL_VIRUS)
cli_dbgmsg("%s found in descriptor %d when scanning file type %u\n", *ctx->virname, desc, ret);
} |
d6bf90e6 |
*/ |
73218de2 |
|
8df99a92 |
if(nret != CL_VIRUS) { |
d68a73d1 |
lastzip = lastrar = 0xdeadbeef;
fpt = ftoffset;
while(fpt) { |
8df99a92 |
if(fpt->offset) switch(fpt->type) { |
d68a73d1 |
case CL_TYPE_RARSFX: |
8df99a92 |
cli_dbgmsg("RAR/RAR-SFX signature found at %u\n", (unsigned int) fpt->offset);
if(type != CL_TYPE_RAR && have_rar && SCAN_ARCHIVE && fpt->offset < 102400 && (DCONF_ARCH & ARCH_CONF_RAR)) {
cli_dbgmsg("RAR/RAR-SFX signature found at %u\n", (unsigned int) fpt->offset); |
d68a73d1 |
nret = cli_scanrar(desc, ctx, fpt->offset, &lastrar);
}
break; |
555c5390 |
|
d68a73d1 |
case CL_TYPE_ZIPSFX: |
8df99a92 |
if(type != CL_TYPE_ZIP && SCAN_ARCHIVE && fpt->offset < 102400 && (DCONF_ARCH & ARCH_CONF_ZIP)) {
cli_dbgmsg("ZIP/ZIP-SFX signature found at %u\n", (unsigned int) fpt->offset); |
a0426339 |
nret = cli_unzip_single(desc, ctx, fpt->offset); |
d68a73d1 |
}
break; |
d8a5c616 |
|
d68a73d1 |
case CL_TYPE_CABSFX: |
8df99a92 |
if(type != CL_TYPE_MSCAB && SCAN_ARCHIVE && fpt->offset < 102400 && (DCONF_ARCH & ARCH_CONF_CAB)) {
cli_dbgmsg("CAB/CAB-SFX signature found at %u\n", (unsigned int) fpt->offset); |
d68a73d1 |
nret = cli_scanmscab(desc, ctx, fpt->offset); |
555c5390 |
} |
d68a73d1 |
break; |
9d96e4b6 |
case CL_TYPE_ARJSFX: |
8df99a92 |
if(type != CL_TYPE_ARJ && SCAN_ARCHIVE && fpt->offset < 102400 && (DCONF_ARCH & ARCH_CONF_ARJ)) { |
9d96e4b6 |
cli_dbgmsg("ARJ-SFX signature found at %u\n", (unsigned int) fpt->offset);
nret = cli_scanarj(desc, ctx, fpt->offset, &lastrar);
}
break; |
555c5390 |
|
faaf436a |
case CL_TYPE_NULSFT: |
8fb8d069 |
if(SCAN_ARCHIVE && type == CL_TYPE_MSEXE && (DCONF_ARCH & ARCH_CONF_NSIS) && fpt->offset > 4) { |
faaf436a |
cli_dbgmsg("NSIS signature found at %u\n", (unsigned int) fpt->offset-4);
nret = cli_scannulsft(desc, ctx, fpt->offset - 4);
}
break;
|
ed93f138 |
case CL_TYPE_AUTOIT: |
7c06afc6 |
if(SCAN_ARCHIVE && type == CL_TYPE_MSEXE && (DCONF_ARCH & ARCH_CONF_AUTOIT)) { |
ed93f138 |
cli_dbgmsg("AUTOIT signature found at %u\n", (unsigned int) fpt->offset);
nret = cli_scanautoit(desc, ctx, fpt->offset + 23);
}
break;
|
cadaa703 |
case CL_TYPE_ISHIELD_MSI: |
9981dfc4 |
if(SCAN_ARCHIVE && type == CL_TYPE_MSEXE && (DCONF_ARCH & ARCH_CONF_ISHIELD)) { |
cadaa703 |
cli_dbgmsg("ISHIELD-MSI signature found at %u\n", (unsigned int) fpt->offset);
nret = cli_scanishield_msi(desc, ctx, fpt->offset + 14);
}
break;
|
72ce4b70 |
case CL_TYPE_PDF: |
8df99a92 |
if(type != CL_TYPE_PDF && SCAN_PDF && (DCONF_DOC & DOC_CONF_PDF)) { |
72ce4b70 |
cli_dbgmsg("PDF signature found at %u\n", (unsigned int) fpt->offset);
nret = cli_scanpdf(desc, ctx, fpt->offset);
}
break;
|
d68a73d1 |
case CL_TYPE_MSEXE: |
8df99a92 |
if(SCAN_PE && (type == CL_TYPE_MSEXE || type == CL_TYPE_ZIP || type == CL_TYPE_MSOLE2) && ctx->dconf->pe) { |
198c851c |
fstat(desc, &sb);
if(sb.st_size > 10485760)
break; |
ee99255a |
memset(&peinfo, 0, sizeof(struct cli_exe_info));
peinfo.offset = fpt->offset;
lseek(desc, fpt->offset, SEEK_SET);
if(cli_peheader(desc, &peinfo) == 0) { |
198c851c |
cli_dbgmsg("*** Detected embedded PE file at %u ***\n", (unsigned int) fpt->offset); |
ee99255a |
if(peinfo.section)
free(peinfo.section);
lseek(desc, fpt->offset, SEEK_SET); |
c1decfc2 |
nret = cli_scanembpe(desc, ctx); |
d68a73d1 |
break_loop = 1; /* we can stop here and other
* embedded executables will
* be found recursively
* through the above call
*/ |
ee99255a |
}
} |
d68a73d1 |
break;
default:
cli_warnmsg("cli_scanraw: Type %u not handled in fpt loop\n", fpt->type); |
ee99255a |
} |
d68a73d1 |
if(nret == CL_VIRUS || break_loop)
break;
fpt = fpt->next;
}
}
if(nret != CL_VIRUS) switch(ret) {
case CL_TYPE_HTML: |
a810ba50 |
if(SCAN_HTML && type == CL_TYPE_TEXT_ASCII && (DCONF_DOC & DOC_CONF_HTML)) {
*dettype = CL_TYPE_HTML; |
d68a73d1 |
nret = cli_scanhtml(desc, ctx); |
a810ba50 |
} |
d68a73d1 |
break;
case CL_TYPE_MAIL: |
c8f2d060 |
if(SCAN_MAIL && type == CL_TYPE_TEXT_ASCII && (DCONF_MAIL & MAIL_CONF_MBOX)) |
d68a73d1 |
nret = cli_scanmail(desc, ctx); |
ee99255a |
break;
|
555c5390 |
default:
break;
} |
d91ab809 |
ctx->recursion--; |
6191ee2c |
ret = nret; |
555c5390 |
}
|
c8b0d9a2 |
while(ftoffset) {
fpt = ftoffset;
ftoffset = ftoffset->next;
free(fpt);
}
if(ret == CL_VIRUS)
cli_dbgmsg("%s found in descriptor %d\n", *ctx->virname, desc);
|
555c5390 |
return ret;
}
|
3c91998b |
int cli_magic_scandesc(int desc, cli_ctx *ctx) |
e3aaff8e |
{ |
7bbd5f7f |
int ret = CL_CLEAN; |
a810ba50 |
cli_file_t type, dettype = 0; |
a7f5fd00 |
struct stat sb; |
ded60d81 |
uint8_t typercg = 1; |
cb680655 |
cli_file_t current_container = ctx->container_type; /* TODO: container tracking code TBD - bb#1293 */ |
a7f5fd00 |
|
8df99a92 |
if(ctx->engine->maxreclevel && ctx->recursion > ctx->engine->maxreclevel) {
cli_dbgmsg("cli_magic_scandesc: Archive recursion limit exceeded (%u, max: %u)\n", ctx->recursion, ctx->engine->maxreclevel);
return CL_CLEAN;
} |
a7f5fd00 |
if(fstat(desc, &sb) == -1) { |
c17ed38c |
cli_errmsg("magic_scandesc: Can't fstat descriptor %d\n", desc); |
871177cd |
return CL_ESTAT; |
a7f5fd00 |
} |
e3aaff8e |
|
a7f5fd00 |
if(sb.st_size <= 5) { |
794f3f23 |
cli_dbgmsg("Small data (%u bytes)\n", (unsigned int) sb.st_size); |
a7f5fd00 |
return CL_CLEAN;
} |
e3aaff8e |
|
3c91998b |
if(!ctx->engine) { |
5612732c |
cli_errmsg("CRITICAL: engine == NULL\n"); |
b3df93db |
return CL_ENULLARG;
}
if(!(ctx->engine->dboptions & CL_DB_COMPILED)) {
cli_errmsg("CRITICAL: engine not compiled\n"); |
322bfd03 |
return CL_EMALFDB; |
e3aaff8e |
}
|
850db69e |
if(cli_updatelimits(ctx, sb.st_size)!=CL_CLEAN)
return CL_CLEAN; |
e3aaff8e |
|
8df99a92 |
if(!ctx->options || (ctx->recursion == ctx->engine->maxreclevel)) { /* raw mode (stdin, etc.) or last level of recursion */
if(ctx->recursion == ctx->engine->maxreclevel)
cli_dbgmsg("cli_magic_scandesc: Hit recursion limit, only scanning raw file\n");
else
cli_dbgmsg("Raw mode: No support for special files\n");
if((ret = cli_scandesc(desc, ctx, 0, 0, NULL, AC_SCAN_VIR)) == CL_VIRUS)
cli_dbgmsg("%s found in descriptor %d\n", *ctx->virname, desc);
return ret; |
d91ab809 |
} |
e3aaff8e |
|
467f8b1e |
lseek(desc, 0, SEEK_SET); |
bd988961 |
type = cli_filetype2(desc, ctx->engine); |
7db77fbf |
if(type == CL_TYPE_ERROR) {
cli_dbgmsg("cli_magic_scandesc: cli_filetype2 returned CL_TYPE_ERROR\n"); |
871177cd |
return CL_EREAD; |
7db77fbf |
} |
2b259453 |
lseek(desc, 0, SEEK_SET); |
6d6e8271 |
|
7021b545 |
if(type != CL_TYPE_IGNORED && ctx->engine->sdb) { |
a810ba50 |
if((ret = cli_scanraw(desc, ctx, type, 0, &dettype)) == CL_VIRUS) |
555c5390 |
return CL_VIRUS;
lseek(desc, 0, SEEK_SET);
}
|
cb680655 |
ctx->container_type = 0; |
d91ab809 |
ctx->recursion++; |
467f8b1e |
switch(type) { |
7021b545 |
case CL_TYPE_IGNORED:
break;
|
3805ebcb |
case CL_TYPE_RAR: |
bb7bd3ab |
if(have_rar && SCAN_ARCHIVE && (DCONF_ARCH & ARCH_CONF_RAR)) |
994ae437 |
ret = cli_scanrar(desc, ctx, 0, NULL); |
467f8b1e |
break; |
6d6e8271 |
|
3805ebcb |
case CL_TYPE_ZIP: |
bc93eda0 |
if(SCAN_ARCHIVE && (DCONF_ARCH & ARCH_CONF_ZIP)) |
a0426339 |
ret = cli_unzip(desc, ctx); |
467f8b1e |
break; |
6d6e8271 |
|
3805ebcb |
case CL_TYPE_GZ: |
bc93eda0 |
if(SCAN_ARCHIVE && (DCONF_ARCH & ARCH_CONF_GZ)) |
3c91998b |
ret = cli_scangzip(desc, ctx); |
467f8b1e |
break; |
6d6e8271 |
|
3805ebcb |
case CL_TYPE_BZ: |
bc93eda0 |
if(SCAN_ARCHIVE && (DCONF_ARCH & ARCH_CONF_BZ)) |
3c91998b |
ret = cli_scanbzip(desc, ctx); |
467f8b1e |
break; |
9d96e4b6 |
case CL_TYPE_ARJ:
if(SCAN_ARCHIVE && (DCONF_ARCH & ARCH_CONF_ARJ))
ret = cli_scanarj(desc, ctx, 0, NULL);
break; |
6d6e8271 |
|
faaf436a |
case CL_TYPE_NULSFT: |
bbd6ca3f |
if(SCAN_ARCHIVE && (DCONF_ARCH & ARCH_CONF_NSIS)) |
faaf436a |
ret = cli_scannulsft(desc, ctx, 0);
break; |
ed93f138 |
case CL_TYPE_AUTOIT: |
ffa6230b |
if(SCAN_ARCHIVE && (DCONF_ARCH & ARCH_CONF_AUTOIT)) |
ed93f138 |
ret = cli_scanautoit(desc, ctx, 23);
break; |
6e47a652 |
|
3805ebcb |
case CL_TYPE_MSSZDD: |
bc93eda0 |
if(SCAN_ARCHIVE && (DCONF_ARCH & ARCH_CONF_SZDD)) |
3c91998b |
ret = cli_scanszdd(desc, ctx); |
341e5433 |
break; |
6e47a652 |
|
3805ebcb |
case CL_TYPE_MSCAB: |
bc93eda0 |
if(SCAN_ARCHIVE && (DCONF_ARCH & ARCH_CONF_CAB)) |
d8a5c616 |
ret = cli_scanmscab(desc, ctx, 0); |
414abe87 |
break;
|
bd988961 |
case CL_TYPE_HTML: |
bc93eda0 |
if(SCAN_HTML && (DCONF_DOC & DOC_CONF_HTML)) |
bd988961 |
ret = cli_scanhtml(desc, ctx);
break;
case CL_TYPE_HTML_UTF16: |
bc93eda0 |
if(SCAN_HTML && (DCONF_DOC & DOC_CONF_HTML)) |
bd988961 |
ret = cli_scanhtml_utf16(desc, ctx);
break;
|
015ce4a8 |
case CL_TYPE_SCRIPT: |
a810ba50 |
if((DCONF_DOC & DOC_CONF_SCRIPT) && dettype != CL_TYPE_HTML) |
015ce4a8 |
ret = cli_scanscript(desc, ctx);
break;
|
52c2a8bd |
case CL_TYPE_RTF: |
d91ab809 |
if(SCAN_ARCHIVE && (DCONF_DOC & DOC_CONF_RTF)) |
bc93eda0 |
ret = cli_scanrtf(desc, ctx); |
52c2a8bd |
break;
|
3805ebcb |
case CL_TYPE_MAIL: |
bc93eda0 |
if(SCAN_MAIL && (DCONF_MAIL & MAIL_CONF_MBOX)) |
3c91998b |
ret = cli_scanmail(desc, ctx); |
467f8b1e |
break; |
6d6e8271 |
|
846e4186 |
case CL_TYPE_TNEF: |
bc93eda0 |
if(SCAN_MAIL && (DCONF_MAIL & MAIL_CONF_TNEF)) |
3c91998b |
ret = cli_scantnef(desc, ctx); |
846e4186 |
break;
|
3953039b |
case CL_TYPE_UUENCODED: |
bc93eda0 |
if(DCONF_OTHER & OTHER_CONF_UUENC) |
3c91998b |
ret = cli_scanuuencoded(desc, ctx); |
3953039b |
break;
|
3805ebcb |
case CL_TYPE_MSCHM: |
bc93eda0 |
if(SCAN_ARCHIVE && (DCONF_ARCH & ARCH_CONF_CHM)) |
3c91998b |
ret = cli_scanmschm(desc, ctx); |
a5373b64 |
break;
|
3805ebcb |
case CL_TYPE_MSOLE2: |
bc93eda0 |
if(SCAN_OLE2 && (DCONF_ARCH & ARCH_CONF_OLE2)) |
3c91998b |
ret = cli_scanole2(desc, ctx); |
467f8b1e |
break; |
6d6e8271 |
|
81fded11 |
case CL_TYPE_7Z:
if(SCAN_ARCHIVE && (DCONF_ARCH & ARCH_CONF_7Z))
ret = cli_7unz(desc, ctx);
break;
|
a7f5fd00 |
case CL_TYPE_POSIX_TAR: |
bc93eda0 |
if(SCAN_ARCHIVE && (DCONF_ARCH & ARCH_CONF_TAR)) |
3c91998b |
ret = cli_scantar(desc, ctx, 1); |
a7f5fd00 |
break;
case CL_TYPE_OLD_TAR: |
bc93eda0 |
if(SCAN_ARCHIVE && (DCONF_ARCH & ARCH_CONF_TAR)) |
3c91998b |
ret = cli_scantar(desc, ctx, 0); |
667ab9c6 |
break;
|
75e46945 |
case CL_TYPE_CPIO_OLD:
if(SCAN_ARCHIVE && (DCONF_ARCH & ARCH_CONF_CPIO))
ret = cli_scancpio_old(desc, ctx);
break;
case CL_TYPE_CPIO_ODC:
if(SCAN_ARCHIVE && (DCONF_ARCH & ARCH_CONF_CPIO))
ret = cli_scancpio_odc(desc, ctx);
break;
case CL_TYPE_CPIO_NEWC:
if(SCAN_ARCHIVE && (DCONF_ARCH & ARCH_CONF_CPIO))
ret = cli_scancpio_newc(desc, ctx, 0);
break;
case CL_TYPE_CPIO_CRC:
if(SCAN_ARCHIVE && (DCONF_ARCH & ARCH_CONF_CPIO))
ret = cli_scancpio_newc(desc, ctx, 1);
break;
|
667ab9c6 |
case CL_TYPE_BINHEX: |
bc93eda0 |
if(SCAN_ARCHIVE && (DCONF_ARCH & ARCH_CONF_BINHEX)) |
3c91998b |
ret = cli_scanbinhex(desc, ctx); |
2b259453 |
break;
|
3805ebcb |
case CL_TYPE_SCRENC: |
bc93eda0 |
if(DCONF_OTHER & OTHER_CONF_SCRENC)
ret = cli_scanscrenc(desc, ctx); |
eb308794 |
break;
case CL_TYPE_RIFF: |
bc93eda0 |
if(SCAN_ALGO && (DCONF_OTHER & OTHER_CONF_RIFF)) |
e4101980 |
ret = cli_scanriff(desc, ctx); |
e57fa318 |
break;
|
7afdc309 |
case CL_TYPE_GRAPHICS: |
bc93eda0 |
if(SCAN_ALGO && (DCONF_OTHER & OTHER_CONF_JPEG)) |
be63d0ad |
ret = cli_scanjpeg(desc, ctx); |
7afdc309 |
break;
|
d070d475 |
case CL_TYPE_PDF: /* FIXMELIMITS: pdf should be an archive! */ |
c5107e70 |
if(SCAN_PDF && (DCONF_DOC & DOC_CONF_PDF)) |
72ce4b70 |
ret = cli_scanpdf(desc, ctx, 0); |
798308de |
break;
|
2c6f9d57 |
case CL_TYPE_CRYPTFF: |
bc93eda0 |
if(DCONF_OTHER & OTHER_CONF_CRYPTFF)
ret = cli_scancryptff(desc, ctx); |
2c6f9d57 |
break;
|
3f97a1e7 |
case CL_TYPE_ELF: |
bc93eda0 |
if(SCAN_ELF && ctx->dconf->elf) |
3c91998b |
ret = cli_scanelf(desc, ctx); |
094116b2 |
break;
|
89c14869 |
case CL_TYPE_MACHO:
if(ctx->dconf->macho) |
8af7ccd0 |
ret = cli_scanmacho(desc, ctx, NULL); |
89c14869 |
break;
|
3222a096 |
case CL_TYPE_MACHO_UNIBIN:
if(ctx->dconf->macho)
ret = cli_scanmacho_unibin(desc, ctx); |
89c14869 |
break;
|
bf45bf13 |
case CL_TYPE_SIS: |
bc93eda0 |
if(SCAN_ARCHIVE && (DCONF_ARCH & ARCH_CONF_SIS)) |
3c91998b |
ret = cli_scansis(desc, ctx); |
bf45bf13 |
break;
|
c8f2d060 |
case CL_TYPE_BINARY_DATA: |
3f81d93a |
if(SCAN_ALGO && (DCONF_OTHER & OTHER_CONF_MYDOOMLOG)) |
e4101980 |
ret = cli_check_mydoom_log(desc, ctx); |
467f8b1e |
break; |
216a697f |
|
a6e38800 |
case CL_TYPE_TEXT_ASCII: |
26fbf6bd |
if(SCAN_STRUCTURED && (DCONF_OTHER & OTHER_CONF_DLP)) |
a6e38800 |
/* TODO: consider calling this from cli_scanscript() for
* a normalised text
*/
ret = cli_scan_structured(desc, ctx);
break;
|
216a697f |
default:
break; |
e3aaff8e |
} |
d91ab809 |
ctx->recursion--; |
cb680655 |
ctx->container_type = current_container; |
467f8b1e |
|
a6e38800 |
if(ret == CL_VIRUS)
return CL_VIRUS;
|
ded60d81 |
if(type == CL_TYPE_ZIP && SCAN_ARCHIVE && (DCONF_ARCH & ARCH_CONF_ZIP)) {
if(sb.st_size > 1048576) {
cli_dbgmsg("cli_magic_scandesc: Not checking for embedded PEs (zip file > 1 MB)\n");
typercg = 0;
}
}
|
08f0150f |
/* CL_TYPE_HTML: raw HTML files are not scanned, unless safety measure activated via DCONF */ |
a6e38800 |
if(type != CL_TYPE_IGNORED && (type != CL_TYPE_HTML || !(DCONF_DOC & DOC_CONF_HTML_SKIPRAW)) && !ctx->engine->sdb) { |
a810ba50 |
if(cli_scanraw(desc, ctx, type, typercg, &dettype) == CL_VIRUS) |
e3aaff8e |
return CL_VIRUS; |
46c2e927 |
} |
e3aaff8e |
|
d91ab809 |
ctx->recursion++; |
77e4bb11 |
lseek(desc, 0, SEEK_SET);
switch(type) { |
a810ba50 |
case CL_TYPE_TEXT_ASCII: |
2582d3ed |
case CL_TYPE_TEXT_UTF16BE:
case CL_TYPE_TEXT_UTF16LE:
case CL_TYPE_TEXT_UTF8: |
a810ba50 |
if((DCONF_DOC & DOC_CONF_SCRIPT) && dettype != CL_TYPE_HTML)
ret = cli_scanscript(desc, ctx); |
7e65889c |
if(ret != CL_VIRUS && ctx->container_type == CL_TYPE_MAIL) {
lseek(desc, 0, SEEK_SET); |
cb680655 |
ret = cli_scandesc(desc, ctx, CL_TYPE_MAIL, 0, NULL, AC_SCAN_VIR); |
7e65889c |
} |
a810ba50 |
break; |
77e4bb11 |
/* Due to performance reasons all executables were first scanned
* in raw mode. Now we will try to unpack them
*/ |
3805ebcb |
case CL_TYPE_MSEXE: |
318f5214 |
if(SCAN_PE && ctx->dconf->pe) |
3c91998b |
ret = cli_scanpe(desc, ctx); |
77e4bb11 |
break; |
8000d078 |
default:
break; |
77e4bb11 |
} |
d91ab809 |
ctx->recursion--; |
77e4bb11 |
|
d59d41b9 |
switch(ret) {
case CL_EFORMAT:
case CL_EMAXREC:
case CL_EMAXSIZE:
case CL_EMAXFILES:
cli_dbgmsg("Descriptor[%d]: %s\n", desc, cl_strerror(ret));
return CL_CLEAN;
default:
return ret; |
322bfd03 |
} |
e3aaff8e |
}
|
2accc66f |
int cl_scandesc(int desc, const char **virname, unsigned long int *scanned, const struct cl_engine *engine, unsigned int scanoptions) |
e3aaff8e |
{ |
3c91998b |
cli_ctx ctx; |
25380806 |
int rc; |
3c91998b |
memset(&ctx, '\0', sizeof(cli_ctx));
ctx.engine = engine;
ctx.virname = virname;
ctx.scanned = scanned; |
2accc66f |
ctx.options = scanoptions; |
25380806 |
ctx.found_possibly_unwanted = 0; |
cb680655 |
ctx.container_type = 0; |
bc93eda0 |
ctx.dconf = (struct cli_dconf *) engine->dconf; |
3c91998b |
|
25380806 |
rc = cli_magic_scandesc(desc, &ctx);
if(rc == CL_CLEAN && ctx.found_possibly_unwanted)
rc = CL_VIRUS;
return rc; |
e3aaff8e |
}
|
7f0d1148 |
int cli_found_possibly_unwanted(cli_ctx* ctx)
{
if(ctx->virname) {
cli_dbgmsg("found Possibly Unwanted: %s\n",*ctx->virname);
if(ctx->options & CL_SCAN_HEURISTIC_PRECEDENCE) {
/* we found a heuristic match, don't scan further,
* but consider it a virus. */
cli_dbgmsg("cli_found_possibly_unwanted: CL_VIRUS\n");
return CL_VIRUS;
}
/* heuristic scan isn't taking precedence, keep scanning.
* If this is part of an archive, and
* we find a real malware we report that instead of the
* heuristic match */
ctx->found_possibly_unwanted = 1;
} else {
cli_warnmsg("cli_found_possibly_unwanted called, but virname is not set\n");
}
return CL_CLEAN;
}
|
3c91998b |
static int cli_scanfile(const char *filename, cli_ctx *ctx) |
21cf4aeb |
{
int fd, ret;
|
22275b15 |
/* internal version of cl_scanfile with arec/mrec preserved */ |
b58fdfc2 |
if((fd = open(filename, O_RDONLY|O_BINARY)) == -1) |
21cf4aeb |
return CL_EOPEN;
|
3c91998b |
ret = cli_magic_scandesc(fd, ctx); |
21cf4aeb |
close(fd);
return ret;
}
|
2accc66f |
int cl_scanfile(const char *filename, const char **virname, unsigned long int *scanned, const struct cl_engine *engine, unsigned int scanoptions) |
e3aaff8e |
{
int fd, ret;
|
ece009c0 |
|
b58fdfc2 |
if((fd = open(filename, O_RDONLY|O_BINARY)) == -1) |
e3aaff8e |
return CL_EOPEN;
|
2accc66f |
ret = cl_scandesc(fd, virname, scanned, engine, scanoptions); |
e3aaff8e |
close(fd);
return ret;
} |
72ce4b70 |
/*
Local Variables:
c-basic-offset: 4
End:
*/ |