e3aaff8e |
/* |
794f3f23 |
* Copyright (C) 2002 - 2007 Tomasz Kojm <tkojm@clamav.net> |
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*
* 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. |
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*
* 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>
#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 |
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#include <fcntl.h> |
b58fdfc2 |
#ifndef C_WINDOWS |
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#include <dirent.h> |
d66387b9 |
#include <netinet/in.h> |
b58fdfc2 |
#endif |
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|
888f5794 |
#if HAVE_MMAP
#if HAVE_SYS_MMAN_H
#include <sys/mman.h>
#else /* HAVE_SYS_MMAN_H */
#undef HAVE_MMAP
#endif
#endif
|
b58fdfc2 |
#ifndef O_BINARY
#define O_BINARY 0
#endif
|
414abe87 |
extern short cli_leavetemps_flag;
|
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" |
478ce4b2 |
#include "unrar.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" |
8d3aca30 |
#include "pst.h" |
bf45bf13 |
#include "sis.h" |
2c313298 |
#include "pdf.h" |
bd988961 |
#include "str.h" |
24fd05e1 |
#include "mspack.h"
#include "cab.h" |
52c2a8bd |
#include "rtf.h"
|
e3aaff8e |
#ifdef HAVE_ZLIB_H
#include <zlib.h> |
f133da7a |
#include "unzip.h" |
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#endif
#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
|
03a2d04a |
#define MAX_MAIL_RECURSION 15 |
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|
05eff05f |
int cli_scannulsft(int desc, cli_ctx *ctx, off_t offset); /* FIXME */ |
3c91998b |
static int cli_scanfile(const char *filename, cli_ctx *ctx); |
4048c4f6 |
|
133538e0 |
static int cli_unrar_scanmetadata(int desc, rar_metadata_t *metadata, cli_ctx *ctx, unsigned int files, uint32_t* sfx_check) |
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{ |
133538e0 |
int ret = CL_SUCCESS;
struct cli_meta_node* mdata; |
2b259453 |
|
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|
133538e0 |
if(files == 1 && sfx_check) {
if(*sfx_check == metadata->crc)
return CL_BREAK;/* break extract loop */
else
*sfx_check = metadata->crc; |
e3aaff8e |
}
|
794f3f23 |
cli_dbgmsg("RAR: %s, crc32: 0x%x, encrypted: %u, compressed: %u, normal: %u, method: %u, ratio: %u (max: %u)\n",
metadata->filename, metadata->crc, metadata->encrypted, (unsigned int) metadata->pack_size,
(unsigned int) metadata->unpack_size, metadata->method,
metadata->pack_size ? (unsigned int) (metadata->unpack_size / metadata->pack_size) : 0, ctx->limits ? ctx->limits->maxratio : 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 |
|
133538e0 |
if(mdata->maxdepth && ctx->arec > mdata->maxdepth)
continue; |
a62ae54f |
|
133538e0 |
/* TODO add support for regex */
/*if(mdata->filename && !strstr(zdirent.d_name, mdata->filename))*/
if(mdata->filename && strcmp((char *) metadata->filename, mdata->filename))
continue; |
a62ae54f |
|
133538e0 |
break; /* matched */ |
a62ae54f |
|
133538e0 |
} while((mdata = mdata->next)); |
a62ae54f |
|
133538e0 |
if(mdata) {
*ctx->virname = mdata->virname;
return CL_VIRUS;
} |
a62ae54f |
|
133538e0 |
if(DETECT_ENCRYPTED && metadata->encrypted) {
cli_dbgmsg("RAR: Encrypted files found in archive.\n");
lseek(desc, 0, SEEK_SET);
ret = cli_scandesc(desc, ctx, 0, 0, 0, NULL);
if(ret != CL_VIRUS) {
*ctx->virname = "Encrypted.RAR";
return CL_VIRUS; |
a62ae54f |
} |
133538e0 |
} |
a62ae54f |
|
133538e0 |
/*
TROG - TODO: multi-volume files
if((rarlist->item.Flags & 0x03) != 0) {
cli_dbgmsg("RAR: Skipping %s (split)\n", rarlist->item.Name);
rarlist = rarlist->next;
continue;
}
*/ |
2dbcf700 |
return ret;
}
static int cli_unrar_checklimits(const cli_ctx *ctx, const rar_metadata_t *metadata, unsigned int files)
{ |
133538e0 |
if(ctx->limits) { |
56caaeda |
if(ctx->limits->maxratio && metadata->unpack_size && metadata->pack_size) {
if(metadata->unpack_size / metadata->pack_size >= ctx->limits->maxratio) {
cli_dbgmsg("RAR: Max ratio reached (%u, max: %u)\n", (unsigned int) (metadata->unpack_size / metadata->pack_size), ctx->limits->maxratio);
if(BLOCKMAX) {
*ctx->virname = "Oversized.RAR";
return CL_VIRUS;
}
return CL_EMAXSIZE;
}
}
|
133538e0 |
if(ctx->limits->maxfilesize && (metadata->unpack_size > ctx->limits->maxfilesize)) { |
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cli_dbgmsg("RAR: %s: Size exceeded (%lu, max: %lu)\n", metadata->filename, (unsigned long int) metadata->unpack_size, ctx->limits->maxfilesize); |
133538e0 |
if(BLOCKMAX) {
*ctx->virname = "RAR.ExceededFileSize";
return CL_VIRUS; |
d272908a |
} |
2dbcf700 |
return CL_EMAXSIZE; |
133538e0 |
} |
d272908a |
|
133538e0 |
if(ctx->limits->maxfiles && (files > ctx->limits->maxfiles)) { |
aa65d959 |
cli_dbgmsg("RAR: Files limit reached (max: %u)\n", ctx->limits->maxfiles); |
133538e0 |
if(BLOCKMAX) {
*ctx->virname = "RAR.ExceededFilesLimit";
return CL_VIRUS; |
e3aaff8e |
} |
2dbcf700 |
return CL_EMAXFILES; |
133538e0 |
}
}
|
2dbcf700 |
return CL_SUCCESS; |
133538e0 |
}
static int cli_scanrar(int desc, cli_ctx *ctx, off_t sfx_offset, uint32_t *sfx_check)
{
int ret = CL_CLEAN;
rar_metadata_t *metadata, *metadata_tmp;
char *dir;
rar_state_t rar_state; |
e3aaff8e |
|
133538e0 |
cli_dbgmsg("in scanrar()\n");
/* generate the temporary directory */
dir = cli_gentemp(NULL);
if(mkdir(dir, 0700)) {
cli_dbgmsg("RAR: Can't create temporary directory %s\n", dir);
free(dir);
return CL_ETMPDIR;
}
if(sfx_offset)
lseek(desc, sfx_offset, SEEK_SET);
if((ret = cli_unrar_open(desc, dir, &rar_state)) != CL_SUCCESS) {
if(!cli_leavetemps_flag)
cli_rmdirs(dir);
free(dir);
cli_dbgmsg("RAR: Error: %s\n", cl_strerror(ret));
return ret;
}
do {
int rc;
rar_state.unpack_data->ofd = -1; |
2dbcf700 |
ret = cli_unrar_extract_next_prepare(&rar_state,dir);
if(ret != CL_SUCCESS)
break;
ret = cli_unrar_checklimits(ctx, rar_state.metadata_tail, rar_state.file_count);
if(ret && ret != CL_VIRUS) { |
49dca2e3 |
free(rar_state.file_header->filename);
free(rar_state.file_header); |
2dbcf700 |
ret = CL_CLEAN;
continue;
} else if(ret == CL_VIRUS) { |
49dca2e3 |
/* needed since we didn't reach unrar_extract_next to clean this up*/
free(rar_state.file_header->filename);
free(rar_state.file_header); |
2dbcf700 |
break;
} |
133538e0 |
ret = cli_unrar_extract_next(&rar_state,dir);
if(rar_state.unpack_data->ofd > 0) {
lseek(rar_state.unpack_data->ofd,0,SEEK_SET);
rc = cli_magic_scandesc(rar_state.unpack_data->ofd,ctx);
close(rar_state.unpack_data->ofd);
if(!cli_leavetemps_flag)
unlink(rar_state.filename);
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;
if(cli_scandir(rar_state.comment_dir, ctx) == CL_VIRUS)
ret = CL_VIRUS; |
e3aaff8e |
|
cf68af72 |
cli_unrar_close(&rar_state);
|
478ce4b2 |
if(!cli_leavetemps_flag)
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;
}
#ifdef HAVE_ZLIB_H |
994ae437 |
static int cli_scanzip(int desc, cli_ctx *ctx, off_t sfx_offset, uint32_t *sfx_check) |
e3aaff8e |
{ |
f133da7a |
zip_dir *zdir;
zip_dirent zdirent;
zip_file *zfp; |
fc56deed |
FILE *tmp = NULL; |
8d3aca30 |
char *tmpname = NULL, *buff; |
33f89aa5 |
int fd, bytes, ret = CL_CLEAN; |
c237a282 |
unsigned long int size = 0; |
6138f165 |
unsigned int files = 0, encrypted, bfcnt; |
fc56deed |
struct stat source; |
a62ae54f |
struct cli_meta_node *mdata; |
f133da7a |
int err; |
6138f165 |
uint8_t swarning = 0, fail, success; |
e3aaff8e |
|
2b259453 |
cli_dbgmsg("in scanzip()\n"); |
e3aaff8e |
|
f133da7a |
if((zdir = zip_dir_open(desc, sfx_offset, &err)) == NULL) {
cli_dbgmsg("Zip: zip_dir_open() return code: %d\n", err); |
77be7ea9 |
/* no return with CL_EZIP due to password protected zips */
return CL_CLEAN; |
e3aaff8e |
}
|
fc56deed |
fstat(desc, &source);
|
33f40ee5 |
if(!(buff = (char *) cli_malloc(FILEBUFF))) { |
cd69cf20 |
cli_dbgmsg("Zip: unable to malloc(%u)\n", FILEBUFF); |
f133da7a |
zip_dir_close(zdir); |
33f40ee5 |
return CL_EMEM;
}
|
f133da7a |
while(zip_dir_read(zdir, &zdirent)) { |
19e2ac07 |
files++; |
fc56deed |
|
994ae437 |
if(files == 1 && sfx_check) {
if(*sfx_check == zdirent.d_crc32)
break;
else
*sfx_check = zdirent.d_crc32;
}
|
f133da7a |
if(!zdirent.d_name) { |
bd2242fb |
cli_dbgmsg("Zip: zdirent.d_name == NULL\n"); |
3c91998b |
*ctx->virname = "Suspect.Zip"; |
fc56deed |
ret = CL_VIRUS;
break;
}
|
5e0d3ebc |
/* Bit 0: file is encrypted
* Bit 6: Strong encryption was used
* Bit 13: Encrypted central directory
*/ |
7bbd5f7f |
encrypted = ((zdirent.d_flags & 0x2041) != 0); |
e5916a51 |
|
794f3f23 |
cli_dbgmsg("Zip: %s, crc32: 0x%x, offset: %u, encrypted: %u, compressed: %u, normal: %u, method: %u, ratio: %u (max: %u)\n", zdirent.d_name, zdirent.d_crc32, zdirent.d_off, encrypted, zdirent.d_csize, zdirent.st_size, zdirent.d_compr, zdirent.d_csize ? (zdirent.st_size / zdirent.d_csize) : 0, ctx->limits ? ctx->limits->maxratio : 0); |
fc56deed |
|
0c9d7f15 |
if(!zdirent.st_size) { |
d3779101 |
if(zdirent.d_crc32) {
cli_dbgmsg("Zip: Broken file or modified information in local header part of archive\n"); |
3c91998b |
*ctx->virname = "Exploit.Zip.ModifiedHeaders"; |
d3779101 |
ret = CL_VIRUS;
break;
} |
e3aaff8e |
continue;
}
|
e5916a51 |
/* Scan metadata */ |
3c91998b |
mdata = ctx->engine->zip_mlist; |
1de1c2b8 |
if(mdata) do { |
e5916a51 |
if(mdata->encrypted != encrypted)
continue;
|
e12c29d2 |
if(mdata->crc32 && mdata->crc32 != zdirent.d_crc32) |
e5916a51 |
continue;
|
e12c29d2 |
if(mdata->csize > 0 && (uint32_t) mdata->csize != zdirent.d_csize) |
e5916a51 |
continue;
|
e12c29d2 |
if(mdata->size >= 0 && (uint32_t) mdata->size != zdirent.st_size) |
e5916a51 |
continue;
|
e12c29d2 |
if(mdata->method >= 0 && (uint16_t) mdata->method != zdirent.d_compr) |
e5916a51 |
continue;
|
19e2ac07 |
if(mdata->fileno && mdata->fileno != files)
continue;
|
3c91998b |
if(mdata->maxdepth && ctx->arec > mdata->maxdepth) |
19e2ac07 |
continue;
/* TODO add support for regex */ |
e5916a51 |
/*if(mdata->filename && !strstr(zdirent.d_name, mdata->filename))*/
if(mdata->filename && strcmp(zdirent.d_name, mdata->filename))
continue;
break; /* matched */
} while((mdata = mdata->next));
if(mdata) { |
3c91998b |
*ctx->virname = mdata->virname; |
e5916a51 |
ret = CL_VIRUS;
break;
}
|
ba5d2f0b |
/*
* Workaround for archives created with ICEOWS.
* ZZIP_DIRENT does not contain information on file type
* so we try to determine a directory via a filename
*/
if(zdirent.d_name[strlen(zdirent.d_name) - 1] == '/') {
cli_dbgmsg("Zip: Directory entry with st_size != 0\n");
continue;
}
|
e12c29d2 |
if(!zdirent.d_csize) {
cli_dbgmsg("Zip: Malformed file (d_csize == 0 but st_size != 0)\n"); |
3c91998b |
*ctx->virname = "Suspect.Zip"; |
fc56deed |
ret = CL_VIRUS; |
e3aaff8e |
break;
}
|
3c91998b |
if(ctx->limits && ctx->limits->maxratio > 0 && ((unsigned) zdirent.st_size / (unsigned) zdirent.d_csize) >= ctx->limits->maxratio) { |
56caaeda |
*ctx->virname = "Oversized.Zip";
ret = CL_VIRUS;
break; |
19ca43de |
}
|
29ce4c6e |
if(encrypted) {
if(DETECT_ENCRYPTED) {
cli_dbgmsg("Zip: Encrypted files found in archive.\n");
lseek(desc, 0, SEEK_SET);
ret = cli_scandesc(desc, ctx, 0, 0, 0, NULL);
if(ret < 0) {
break;
} else if(ret != CL_VIRUS) {
*ctx->virname = "Encrypted.Zip";
ret = CL_VIRUS;
} |
3862f7e1 |
break; |
29ce4c6e |
} else continue; |
0f34221a |
}
|
3c91998b |
if(ctx->limits) {
if(ctx->limits->maxfilesize && ((unsigned int) zdirent.st_size > ctx->limits->maxfilesize)) { |
794f3f23 |
cli_dbgmsg("Zip: %s: Size exceeded (%u, max: %lu)\n", zdirent.d_name, zdirent.st_size, ctx->limits->maxfilesize); |
6ccc6990 |
/* ret = CL_EMAXSIZE; */ |
d272908a |
if(BLOCKMAX) { |
3c91998b |
*ctx->virname = "Zip.ExceededFileSize"; |
d272908a |
ret = CL_VIRUS;
break;
}
continue; /* continue scanning */ |
e3aaff8e |
}
|
3c91998b |
if(ctx->limits->maxfiles && (files > ctx->limits->maxfiles)) { |
794f3f23 |
cli_dbgmsg("Zip: Files limit reached (max: %u)\n", ctx->limits->maxfiles); |
d272908a |
if(BLOCKMAX) { |
3c91998b |
*ctx->virname = "Zip.ExceededFilesLimit"; |
d272908a |
ret = CL_VIRUS;
break;
} |
e3aaff8e |
break;
}
}
|
f133da7a |
if((zfp = zip_file_open(zdir, zdirent.d_name, zdirent.d_off)) == NULL) {
if(zdir->errcode == CL_ESUPPORT) {
ret = CL_ESUPPORT;
if(!swarning) {
cli_warnmsg("Not supported compression method in one or more files\n");
swarning = 1;
} |
8997fbe1 |
continue; |
f133da7a |
} else {
cli_dbgmsg("Zip: Can't open file %s\n", zdirent.d_name);
ret = CL_EZIP;
break;
} |
c4098620 |
}
|
6138f165 |
bfcnt = 0;
success = 0;
while(1) {
fail = 0;
/* generate temporary file and get its descriptor */
if((tmpname = cli_gentempstream(NULL, &tmp)) == NULL) {
cli_dbgmsg("Zip: Can't generate tmpfile().\n");
ret = CL_ETMPFILE;
break;
}
size = 0;
while((bytes = zip_file_read(zfp, buff, FILEBUFF)) > 0) {
size += bytes;
if(fwrite(buff, 1, bytes, tmp) != (size_t) bytes) {
cli_dbgmsg("Zip: Can't write to file.\n");
ret = CL_EIO;
break;
}
}
if(!encrypted) {
if(size != zdirent.st_size) { |
794f3f23 |
cli_dbgmsg("Zip: Incorrectly decompressed (%lu != %lu)\n", size, (unsigned long int) zdirent.st_size); |
6138f165 |
if(zfp->bf[0] == -1) {
ret = CL_EZIP;
break;
} else {
fail = 1;
}
} else {
cli_dbgmsg("Zip: File decompressed to %s\n", tmpname);
success = 1;
}
}
if(!fail) {
if(fflush(tmp) != 0) {
cli_dbgmsg("Zip: fflush() failed\n");
ret = CL_EFSYNC;
break;
}
fd = fileno(tmp);
lseek(fd, 0, SEEK_SET);
if((ret = cli_magic_scandesc(fd, ctx)) == CL_VIRUS ) {
cli_dbgmsg("Zip: Infected with %s\n", *ctx->virname);
ret = CL_VIRUS;
break;
}
} |
e3aaff8e |
|
6138f165 |
if(tmp) { |
33f40ee5 |
fclose(tmp); |
0e621e7d |
if(!cli_leavetemps_flag)
unlink(tmpname);
free(tmpname); |
6138f165 |
tmp = NULL; |
e3aaff8e |
}
|
6138f165 |
if(zfp->bf[bfcnt] == -1) |
e4e2058a |
break;
|
6138f165 |
zfp->method = (uint16_t) zfp->bf[bfcnt];
cli_dbgmsg("Zip: Brute force mode - checking compression method %u\n", zfp->method);
bfcnt++; |
c237a282 |
} |
6138f165 |
zip_file_close(zfp); |
c237a282 |
|
a5feb738 |
if(!ret && !encrypted && !success) { /* brute-force decompression failed */ |
6138f165 |
cli_dbgmsg("Zip: All attempts to decompress file failed\n");
ret = CL_EZIP; |
e3aaff8e |
}
|
6138f165 |
if(ret) |
e3aaff8e |
break;
}
|
f133da7a |
zip_dir_close(zdir);
if(tmp) { |
cdb0ae9c |
fclose(tmp); |
0e621e7d |
if(!cli_leavetemps_flag)
unlink(tmpname);
free(tmpname); |
cdb0ae9c |
tmp = NULL;
} |
33f40ee5 |
free(buff); |
e3aaff8e |
return ret;
}
|
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; |
fc56deed |
FILE *tmp = NULL; |
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); |
e3aaff8e |
return CL_EGZIP;
}
|
0e621e7d |
if((tmpname = cli_gentempstream(NULL, &tmp)) == NULL) { |
2b259453 |
cli_dbgmsg("GZip: Can't generate temporary file.\n"); |
e3aaff8e |
gzclose(gd);
return CL_ETMPFILE;
}
fd = fileno(tmp);
|
fc56deed |
if(!(buff = (char *) cli_malloc(FILEBUFF))) { |
794f3f23 |
cli_dbgmsg("GZip: Unable to malloc %u bytes.\n", FILEBUFF); |
fc56deed |
gzclose(gd); |
0e621e7d |
fclose(tmp);
if(!cli_leavetemps_flag)
unlink(tmpname);
free(tmpname); |
f7148839 |
return CL_EMEM; |
fc56deed |
} |
f7148839 |
|
fc56deed |
while((bytes = gzread(gd, buff, FILEBUFF)) > 0) { |
e3aaff8e |
size += bytes;
|
3c91998b |
if(ctx->limits)
if(ctx->limits->maxfilesize && (size + FILEBUFF > ctx->limits->maxfilesize)) {
cli_dbgmsg("GZip: Size exceeded (stopped at %ld, max: %ld)\n", size, ctx->limits->maxfilesize); |
985d9958 |
if(BLOCKMAX) { |
3c91998b |
*ctx->virname = "GZip.ExceededFileSize"; |
985d9958 |
ret = CL_VIRUS;
} |
e3aaff8e |
break;
}
|
4152ad50 |
if(cli_writen(fd, buff, bytes) != bytes) { |
2b259453 |
cli_dbgmsg("GZip: Can't write to file.\n"); |
cdb0ae9c |
fclose(tmp); |
0e621e7d |
if(!cli_leavetemps_flag)
unlink(tmpname);
free(tmpname); |
e3aaff8e |
gzclose(gd); |
f7148839 |
free(buff); |
e3aaff8e |
return CL_EGZIP;
}
}
|
f7148839 |
free(buff); |
e3aaff8e |
gzclose(gd); |
985d9958 |
if(ret == CL_VIRUS) {
fclose(tmp); |
0e621e7d |
if(!cli_leavetemps_flag)
unlink(tmpname);
free(tmpname); |
985d9958 |
return ret;
}
|
e3aaff8e |
if(fsync(fd) == -1) { |
2b259453 |
cli_dbgmsg("GZip: Can't synchronise descriptor %d\n", fd); |
cdb0ae9c |
fclose(tmp); |
0e621e7d |
if(!cli_leavetemps_flag)
unlink(tmpname);
free(tmpname); |
e3aaff8e |
return CL_EFSYNC;
}
lseek(fd, 0, SEEK_SET); |
3c91998b |
if((ret = cli_magic_scandesc(fd, ctx)) == CL_VIRUS ) {
cli_dbgmsg("GZip: Infected with %s\n", *ctx->virname); |
cdb0ae9c |
fclose(tmp); |
0e621e7d |
if(!cli_leavetemps_flag)
unlink(tmpname);
free(tmpname); |
e3aaff8e |
return CL_VIRUS;
} |
cdb0ae9c |
fclose(tmp); |
0e621e7d |
if(!cli_leavetemps_flag)
unlink(tmpname);
free(tmpname); |
e3aaff8e |
return ret;
}
#endif
#ifdef HAVE_BZLIB_H
#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;
short memlim = 0; |
33f89aa5 |
unsigned long int size = 0; |
f7148839 |
char *buff; |
fc56deed |
FILE *fs, *tmp = NULL; |
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); |
e3aaff8e |
return CL_EBZIP;
}
|
3c91998b |
if(ctx->limits)
if(ctx->limits->archivememlim) |
e3aaff8e |
memlim = 1;
|
68b96877 |
if((bfd = BZ2_bzReadOpen(&bzerror, fs, 0, memlim, NULL, 0)) == NULL) { |
2b259453 |
cli_dbgmsg("Bzip: Can't initialize bzip2 library (descriptor: %d).\n", desc); |
9e431a95 |
fclose(fs); |
e3aaff8e |
return CL_EBZIP;
}
|
0e621e7d |
if((tmpname = cli_gentempstream(NULL, &tmp)) == NULL) { |
2b259453 |
cli_dbgmsg("Bzip: Can't generate temporary file.\n"); |
e3aaff8e |
BZ2_bzReadClose(&bzerror, bfd); |
9e431a95 |
fclose(fs); |
e3aaff8e |
return CL_ETMPFILE;
}
fd = fileno(tmp);
|
cd69cf20 |
if(!(buff = (char *) cli_malloc(FILEBUFF))) {
cli_dbgmsg("Bzip: Unable to malloc %u bytes.\n", FILEBUFF); |
9e431a95 |
fclose(tmp); |
0e621e7d |
if(!cli_leavetemps_flag)
unlink(tmpname);
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;
|
3c91998b |
if(ctx->limits)
if(ctx->limits->maxfilesize && (size + FILEBUFF > ctx->limits->maxfilesize)) {
cli_dbgmsg("Bzip: Size exceeded (stopped at %ld, max: %ld)\n", size, ctx->limits->maxfilesize); |
985d9958 |
if(BLOCKMAX) { |
3c91998b |
*ctx->virname = "BZip.ExceededFileSize"; |
985d9958 |
ret = CL_VIRUS;
} |
e3aaff8e |
break;
}
|
4152ad50 |
if(cli_writen(fd, buff, bytes) != bytes) { |
2b259453 |
cli_dbgmsg("Bzip: Can't write to file.\n"); |
e3aaff8e |
BZ2_bzReadClose(&bzerror, bfd); |
cdb0ae9c |
fclose(tmp); |
0e621e7d |
if(!cli_leavetemps_flag)
unlink(tmpname);
free(tmpname); |
f7148839 |
free(buff); |
9e431a95 |
fclose(fs); |
e3aaff8e |
return CL_EGZIP;
}
}
|
f7148839 |
free(buff); |
e3aaff8e |
BZ2_bzReadClose(&bzerror, bfd); |
985d9958 |
if(ret == CL_VIRUS) {
fclose(tmp); |
0e621e7d |
if(!cli_leavetemps_flag)
unlink(tmpname);
free(tmpname); |
985d9958 |
fclose(fs);
return ret;
}
|
e3aaff8e |
if(fsync(fd) == -1) { |
2b259453 |
cli_dbgmsg("Bzip: Synchronisation failed for descriptor %d\n", fd); |
cdb0ae9c |
fclose(tmp); |
0e621e7d |
if(!cli_leavetemps_flag)
unlink(tmpname);
free(tmpname); |
9e431a95 |
fclose(fs); |
e3aaff8e |
return CL_EFSYNC;
}
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 |
} |
cdb0ae9c |
fclose(tmp); |
0e621e7d |
if(!cli_leavetemps_flag)
unlink(tmpname);
free(tmpname); |
9e431a95 |
fclose(fs); |
e3aaff8e |
return ret;
}
#endif
|
3c91998b |
static int cli_scanszdd(int desc, cli_ctx *ctx) |
341e5433 |
{ |
5da612a4 |
int fd, ret = CL_CLEAN, dcpy; |
341e5433 |
FILE *tmp = NULL, *in; |
0e621e7d |
char *tmpname; |
341e5433 |
|
2b259453 |
|
5da612a4 |
cli_dbgmsg("in cli_scanszdd()\n");
if((dcpy = dup(desc)) == -1) {
cli_dbgmsg("SZDD: Can't duplicate descriptor %d\n", desc);
return CL_EIO;
} |
341e5433 |
|
5da612a4 |
if((in = fdopen(dcpy, "rb")) == NULL) { |
2b259453 |
cli_dbgmsg("SZDD: Can't open descriptor %d\n", desc); |
5da612a4 |
close(dcpy); |
341e5433 |
return CL_EMSCOMP;
}
|
0e621e7d |
if((tmpname = cli_gentempstream(NULL, &tmp)) == NULL) { |
2b259453 |
cli_dbgmsg("SZDD: Can't generate temporary file.\n"); |
341e5433 |
fclose(in);
return CL_ETMPFILE;
}
if(cli_msexpand(in, tmp) == -1) { |
2b259453 |
cli_dbgmsg("SZDD: msexpand failed.\n"); |
0e621e7d |
fclose(in);
fclose(tmp);
if(!cli_leavetemps_flag)
unlink(tmpname);
free(tmpname); |
341e5433 |
return CL_EMSCOMP;
}
fclose(in);
if(fflush(tmp)) { |
2b259453 |
cli_dbgmsg("SZDD: fflush() failed.\n"); |
341e5433 |
fclose(tmp); |
0e621e7d |
if(!cli_leavetemps_flag)
unlink(tmpname);
free(tmpname); |
341e5433 |
return CL_EFSYNC;
}
fd = fileno(tmp);
lseek(fd, 0, SEEK_SET); |
3c91998b |
if((ret = cli_magic_scandesc(fd, ctx)) == CL_VIRUS) {
cli_dbgmsg("SZDD: Infected with %s\n", *ctx->virname); |
341e5433 |
fclose(tmp); |
0e621e7d |
if(!cli_leavetemps_flag)
unlink(tmpname);
free(tmpname); |
341e5433 |
return CL_VIRUS;
}
fclose(tmp); |
0e621e7d |
if(!cli_leavetemps_flag)
unlink(tmpname);
free(tmpname); |
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 |
|
24fd05e1 |
if(ctx->limits && ctx->limits->maxfilesize && (file->length > ctx->limits->maxfilesize)) { |
794f3f23 |
cli_dbgmsg("CAB: %s: Size exceeded (%u, max: %lu)\n", file->name, file->length, ctx->limits->maxfilesize); |
24fd05e1 |
if(BLOCKMAX) {
*ctx->virname = "CAB.ExceededFileSize";
cab_free(&cab);
return CL_VIRUS; |
52ab3176 |
} |
24fd05e1 |
continue;
} |
52ab3176 |
|
24fd05e1 |
if(ctx->limits && ctx->limits->maxfiles && (files > ctx->limits->maxfiles)) {
cli_dbgmsg("CAB: Files limit reached (max: %u)\n", ctx->limits->maxfiles);
cab_free(&cab);
if(BLOCKMAX) {
*ctx->virname = "CAB.ExceededFilesLimit";
return CL_VIRUS; |
414abe87 |
} |
24fd05e1 |
return CL_CLEAN; |
414abe87 |
} |
24fd05e1 |
tempname = cli_gentemp(NULL); |
5a5e6312 |
cli_dbgmsg("CAB: Extracting file %s to %s, size %u\n", file->name, tempname, file->length);
if((ret = cab_extract(file, tempname))) |
24fd05e1 |
cli_dbgmsg("CAB: Failed to extract file: %s\n", cl_strerror(ret));
else
ret = cli_scanfile(tempname, ctx);
if(!cli_leavetemps_flag)
unlink(tempname);
free(tempname); |
414abe87 |
if(ret == CL_VIRUS)
break;
}
|
24fd05e1 |
cab_free(&cab); |
414abe87 |
return ret;
}
|
3c91998b |
int cli_scandir(const char *dirname, cli_ctx *ctx) |
47bbbc56 |
{ |
467f8b1e |
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 |
467f8b1e |
struct stat statbuf;
char *fname; |
47bbbc56 |
|
467f8b1e |
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 |
467f8b1e |
while((dent = readdir(dd))) { |
72a1b240 |
#endif |
b58fdfc2 |
#if (!defined(C_CYGWIN)) && (!defined(C_INTERIX)) && (!defined(C_WINDOWS)) |
feeaa333 |
if(dent->d_ino)
#endif
{ |
467f8b1e |
if(strcmp(dent->d_name, ".") && strcmp(dent->d_name, "..")) {
/* build the full name */ |
6a4078f2 |
fname = cli_malloc(strlen(dirname) + strlen(dent->d_name) + 2); |
cd69cf20 |
if(!fname) {
closedir(dd);
return CL_EMEM;
}
|
467f8b1e |
sprintf(fname, "%s/%s", dirname, dent->d_name); |
47bbbc56 |
|
467f8b1e |
/* stat the file */
if(lstat(fname, &statbuf) != -1) {
if(S_ISDIR(statbuf.st_mode) && !S_ISLNK(statbuf.st_mode)) { |
3c91998b |
if (cli_scandir(fname, ctx) == CL_VIRUS) { |
467f8b1e |
free(fname);
closedir(dd);
return CL_VIRUS;
}
} else
if(S_ISREG(statbuf.st_mode)) |
3c91998b |
if(cli_scanfile(fname, ctx) == CL_VIRUS) { |
467f8b1e |
free(fname);
closedir(dd);
return CL_VIRUS;
} |
47bbbc56 |
|
bbb90786 |
} |
467f8b1e |
free(fname); |
47bbbc56 |
}
}
} |
467f8b1e |
} else { |
2b259453 |
cli_dbgmsg("ScanDir: Can't open directory %s.\n", dirname); |
467f8b1e |
return CL_EOPEN;
} |
47bbbc56 |
|
467f8b1e |
closedir(dd);
return 0; |
47bbbc56 |
} |
467f8b1e |
|
3c91998b |
static int cli_vba_scandir(const char *dirname, cli_ctx *ctx) |
e3aaff8e |
{ |
892d2f56 |
int ret = CL_CLEAN, i, fd, ofd, 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; |
56bfccb2 |
char *fname, *fullname; |
467f8b1e |
unsigned char *data;
|
2b259453 |
cli_dbgmsg("VBADir: %s\n", dirname); |
467f8b1e |
if((vba_project = (vba_project_t *) vba56_dir_read(dirname))) { |
e3aaff8e |
|
467f8b1e |
for(i = 0; i < vba_project->count; i++) {
fullname = (char *) cli_malloc(strlen(vba_project->dir) + strlen(vba_project->name[i]) + 2); |
cd69cf20 |
if(!fullname) {
ret = CL_EMEM;
break;
} |
467f8b1e |
sprintf(fullname, "%s/%s", vba_project->dir, vba_project->name[i]); |
b58fdfc2 |
fd = open(fullname, O_RDONLY|O_BINARY); |
467f8b1e |
if(fd == -1) { |
2b259453 |
cli_dbgmsg("VBADir: Can't open file %s\n", fullname); |
467f8b1e |
free(fullname);
ret = CL_EOPEN;
break;
}
free(fullname); |
2b259453 |
cli_dbgmsg("VBADir: Decompress VBA project '%s'\n", vba_project->name[i]); |
467f8b1e |
data = (unsigned char *) vba_decompress(fd, vba_project->offset[i], &data_len);
close(fd);
if(!data) { |
2b259453 |
cli_dbgmsg("VBADir: WARNING: VBA project '%s' decompressed to NULL\n", vba_project->name[i]); |
467f8b1e |
} else { |
3c91998b |
if(ctx->scanned)
*ctx->scanned += data_len / CL_COUNT_PRECISION; |
cedc2d2a |
|
4e9ab8ed |
if(cli_scanbuff(data, data_len, ctx->virname, ctx->engine, CL_TYPE_MSOLE2) == CL_VIRUS) { |
467f8b1e |
free(data);
ret = CL_VIRUS;
break;
}
free(data);
}
}
for(i = 0; i < vba_project->count; i++)
free(vba_project->name[i]);
free(vba_project->name);
free(vba_project->dir);
free(vba_project->offset);
free(vba_project); |
c240c32c |
} else if ((fullname = ppt_vba_read(dirname))) { |
3c91998b |
if(cli_scandir(fullname, ctx) == CL_VIRUS) { |
c240c32c |
ret = CL_VIRUS;
} |
8d5e0ac0 |
if(!cli_leavetemps_flag)
cli_rmdirs(fullname); |
c240c32c |
free(fullname); |
2e53806b |
} else if ((vba_project = (vba_project_t *) wm_dir_read(dirname))) {
for (i = 0; i < vba_project->count; i++) {
fullname = (char *) cli_malloc(strlen(vba_project->dir) + strlen(vba_project->name[i]) + 2); |
cd69cf20 |
if(!fullname) {
ret = CL_EMEM;
break;
} |
2e53806b |
sprintf(fullname, "%s/%s", vba_project->dir, vba_project->name[i]); |
b58fdfc2 |
fd = open(fullname, O_RDONLY|O_BINARY); |
2e53806b |
if(fd == -1) { |
2b259453 |
cli_dbgmsg("VBADir: Can't open file %s\n", fullname); |
2e53806b |
free(fullname);
ret = CL_EOPEN;
break;
}
free(fullname); |
c6344923 |
cli_dbgmsg("VBADir: Decompress WM project '%s' macro:%d key:%d length:%d\n", vba_project->name[i], i, vba_project->key[i], vba_project->length[i]);
if(vba_project->length[i])
data = (unsigned char *) wm_decrypt_macro(fd, vba_project->offset[i], vba_project->length[i], vba_project->key[i]);
else
data = NULL; |
2e53806b |
close(fd);
if(!data) { |
2b259453 |
cli_dbgmsg("VBADir: WARNING: WM project '%s' macro %d decrypted to NULL\n", vba_project->name[i], i); |
2e53806b |
} else { |
3c91998b |
if(ctx->scanned)
*ctx->scanned += vba_project->length[i] / CL_COUNT_PRECISION; |
4e9ab8ed |
if(cli_scanbuff(data, vba_project->length[i], ctx->virname, ctx->engine, CL_TYPE_MSOLE2) == CL_VIRUS) { |
2e53806b |
free(data);
ret = CL_VIRUS;
break;
}
free(data);
}
}
for(i = 0; i < vba_project->count; i++)
free(vba_project->name[i]);
free(vba_project->key);
free(vba_project->length);
free(vba_project->offset);
free(vba_project->name);
free(vba_project->dir);
free(vba_project); |
467f8b1e |
} |
cd69cf20 |
|
467f8b1e |
if(ret != CL_CLEAN)
return ret; |
e3aaff8e |
|
892d2f56 |
/* Check directory for embedded OLE objects */
fullname = (char *) cli_malloc(strlen(dirname) + 16); |
cd69cf20 |
if(!fullname)
return CL_EMEM;
|
892d2f56 |
sprintf(fullname, "%s/_1_Ole10Native", dirname); |
b58fdfc2 |
fd = open(fullname, O_RDONLY|O_BINARY); |
892d2f56 |
free(fullname);
if (fd >= 0) {
ofd = cli_decode_ole_object(fd, dirname);
if (ofd >= 0) { |
73218de2 |
ret = cli_scandesc(ofd, ctx, 0, 0, 0, NULL); |
892d2f56 |
close(ofd);
}
close(fd);
if(ret != CL_CLEAN)
return ret;
}
|
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 |
b58fdfc2 |
#if (!defined(C_CYGWIN)) && (!defined(C_INTERIX)) && (!defined(C_WINDOWS)) |
feeaa333 |
if(dent->d_ino)
#endif
{ |
e3aaff8e |
if(strcmp(dent->d_name, ".") && strcmp(dent->d_name, "..")) {
/* build the full name */ |
6a4078f2 |
fname = cli_malloc(strlen(dirname) + strlen(dent->d_name) + 2); |
cd69cf20 |
if(!fname) {
ret = CL_EMEM;
break;
} |
e3aaff8e |
sprintf(fname, "%s/%s", dirname, dent->d_name);
/* stat the file */
if(lstat(fname, &statbuf) != -1) {
if(S_ISDIR(statbuf.st_mode) && !S_ISLNK(statbuf.st_mode)) |
3c91998b |
if (cli_vba_scandir(fname, ctx) == CL_VIRUS) { |
467f8b1e |
ret = CL_VIRUS;
free(fname);
break;
} |
e3aaff8e |
}
free(fname);
}
}
}
} 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);
return CL_EIO;
}
/* Because HTML detection is FP-prone and html_normalise_fd() needs to
* mmap the file don't normalise files larger than 10 MB.
*/
if(sb.st_size > 10485760) {
cli_dbgmsg("cli_scanhtml: exiting (file larger than 10 MB)\n");
return CL_CLEAN;
}
|
a92110df |
tempname = cli_gentemp(NULL);
if(mkdir(tempname, 0700)) { |
572a986c |
cli_errmsg("cli_scanhtml: Can't create temporary directory %s\n", tempname); |
f0bc32bd |
free(tempname); |
a92110df |
return CL_ETMPDIR;
}
|
462e8e5e |
html_normalise_fd(desc, tempname, NULL, ctx->dconf); |
a92110df |
snprintf(fullname, 1024, "%s/comment.html", tempname); |
b58fdfc2 |
fd = open(fullname, O_RDONLY|O_BINARY); |
a92110df |
if (fd >= 0) { |
73218de2 |
ret = cli_scandesc(fd, ctx, 0, CL_TYPE_HTML, 0, NULL); |
a92110df |
close(fd);
}
if(ret < 0 || ret == CL_VIRUS) {
if(!cli_leavetemps_flag)
cli_rmdirs(tempname);
free(tempname);
return ret;
}
if (ret == CL_CLEAN) {
snprintf(fullname, 1024, "%s/nocomment.html", tempname); |
b58fdfc2 |
fd = open(fullname, O_RDONLY|O_BINARY); |
a92110df |
if (fd >= 0) { |
73218de2 |
ret = cli_scandesc(fd, ctx, 0, CL_TYPE_HTML, 0, NULL); |
a92110df |
close(fd);
}
}
if(ret < 0 || ret == CL_VIRUS) {
if(!cli_leavetemps_flag)
cli_rmdirs(tempname);
free(tempname);
return ret;
}
if (ret == CL_CLEAN) {
snprintf(fullname, 1024, "%s/script.html", tempname); |
b58fdfc2 |
fd = open(fullname, O_RDONLY|O_BINARY); |
a92110df |
if (fd >= 0) { |
73218de2 |
ret = cli_scandesc(fd, ctx, 0, CL_TYPE_HTML, 0, NULL); |
a92110df |
close(fd);
}
}
if(ret < 0 || ret == CL_VIRUS) {
if(!cli_leavetemps_flag)
cli_rmdirs(tempname);
free(tempname);
return ret;
}
if (ret == CL_CLEAN) {
snprintf(fullname, 1024, "%s/rfc2397", tempname); |
3c91998b |
ret = cli_scandir(fullname, ctx); |
a92110df |
}
if(!cli_leavetemps_flag)
cli_rmdirs(tempname);
free(tempname);
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");
tempname = cli_gentemp(NULL);
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);
return CL_EIO;
}
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);
unlink(tempname);
free(tempname);
close(fd);
return CL_EIO;
}
free(decoded);
}
}
fsync(fd);
lseek(fd, 0, SEEK_SET);
ret = cli_scanhtml(fd, ctx);
close(fd);
if(!cli_leavetemps_flag)
unlink(tempname);
else
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; |
467f8b1e |
|
2b259453 |
|
467f8b1e |
cli_dbgmsg("in cli_scanole2()\n");
/* generate the temporary directory */ |
0c7019c5 |
dir = cli_gentemp(NULL); |
467f8b1e |
if(mkdir(dir, 0700)) { |
2b259453 |
cli_dbgmsg("OLE2: Can't create temporary directory %s\n", dir); |
f0bc32bd |
free(dir); |
467f8b1e |
return CL_ETMPDIR;
}
|
3c91998b |
if((ret = cli_ole2_extract(desc, dir, ctx->limits))) { |
2b259453 |
cli_dbgmsg("OLE2: %s\n", cl_strerror(ret)); |
8d5e0ac0 |
if(!cli_leavetemps_flag)
cli_rmdirs(dir); |
467f8b1e |
free(dir);
return ret;
}
|
3c91998b |
if((ret = cli_vba_scandir(dir, ctx)) != CL_VIRUS) {
if(cli_scandir(dir, ctx) == CL_VIRUS) { |
56bfccb2 |
ret = CL_VIRUS; |
467f8b1e |
}
}
|
8d5e0ac0 |
if(!cli_leavetemps_flag)
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 */ |
0c7019c5 |
dir = cli_gentemp(NULL); |
2b259453 |
if(mkdir(dir, 0700)) {
cli_errmsg("Tar: Can't create temporary directory %s\n", dir); |
f0bc32bd |
free(dir); |
2b259453 |
return CL_ETMPDIR;
}
|
500a71b4 |
if((ret = cli_untar(dir, desc, posix, ctx->limits))) |
2b259453 |
cli_dbgmsg("Tar: %s\n", cl_strerror(ret));
else |
3c91998b |
ret = cli_scandir(dir, ctx); |
2b259453 |
if(!cli_leavetemps_flag)
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 */
dir = cli_gentemp(NULL);
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 |
3c91998b |
ret = cli_scandir(dir, ctx); |
667ab9c6 |
if(!cli_leavetemps_flag)
cli_rmdirs(dir);
free(dir);
return ret;
}
|
3c91998b |
static int cli_scanmschm(int desc, cli_ctx *ctx) |
a5373b64 |
{
char *tempname;
int ret = CL_CLEAN;
cli_dbgmsg("in cli_scanmschm()\n");
|
0c7019c5 |
tempname = cli_gentemp(NULL); |
a5373b64 |
if(mkdir(tempname, 0700)) { |
2b259453 |
cli_dbgmsg("CHM: Can't create temporary directory %s\n", tempname); |
f0bc32bd |
free(tempname); |
a5373b64 |
return CL_ETMPDIR;
}
if(chm_unpack(desc, tempname)) |
3c91998b |
ret = cli_scandir(tempname, ctx); |
a5373b64 |
if(!cli_leavetemps_flag)
cli_rmdirs(tempname);
free(tempname);
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");
|
0c7019c5 |
tempname = cli_gentemp(NULL); |
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)) |
3c91998b |
ret = cli_scandir(tempname, ctx); |
e57fa318 |
if(!cli_leavetemps_flag)
cli_rmdirs(tempname);
free(tempname);
return ret;
} |
015e31e1 |
|
33f89aa5 |
static int cli_scanriff(int desc, const char **virname) |
eb308794 |
{
int ret = CL_CLEAN;
if(cli_check_riff_exploit(desc) == 2) {
ret = CL_VIRUS;
*virname = "Exploit.W32.MS05-002";
}
return ret;
}
|
7afdc309 |
static int cli_scanjpeg(int desc, const char **virname)
{
int ret = CL_CLEAN;
if(cli_check_jpeg_exploit(desc) == 1) {
ret = CL_VIRUS;
*virname = "Exploit.W32.MS04-028";
}
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); |
2c6f9d57 |
return CL_EIO;
}
/* 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);
return CL_EIO;
}
for(i = 0; i < length; i++)
dest[i] = src[i] ^ (unsigned char) 0xff;
free(src);
tempfile = cli_gentemp(NULL); |
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);
return CL_EIO;
}
if(write(ndesc, dest, length) == -1) {
cli_dbgmsg("CryptFF: Can't write to descriptor %d\n", ndesc);
free(dest);
close(ndesc);
free(tempfile);
return CL_EIO;
}
free(dest);
if(fsync(ndesc) == -1) {
cli_errmsg("CryptFF: Can't fsync descriptor %d\n", ndesc);
close(ndesc);
free(tempfile);
return CL_EIO;
}
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);
if(cli_leavetemps_flag)
cli_dbgmsg("CryptFF: Decompressed data saved in %s\n", tempfile);
else
unlink(tempfile);
free(tempfile);
return ret;
}
|
3c91998b |
static int cli_scanpdf(int desc, cli_ctx *ctx) |
798308de |
{
int ret;
char *dir = cli_gentemp(NULL);
if(mkdir(dir, 0700)) {
cli_dbgmsg("Can't create temporary directory for PDF file %s\n", dir);
free(dir);
return CL_ETMPDIR;
}
|
2c313298 |
ret = cli_pdf(dir, desc, ctx); |
798308de |
if(ret == CL_CLEAN) |
3c91998b |
ret = cli_scandir(dir, ctx); |
798308de |
if(!cli_leavetemps_flag)
cli_rmdirs(dir);
free(dir);
return ret;
}
|
3c91998b |
static int cli_scantnef(int desc, cli_ctx *ctx) |
f0bc32bd |
{
int ret;
char *dir = cli_gentemp(NULL);
if(mkdir(dir, 0700)) {
cli_dbgmsg("Can't create temporary directory for tnef file %s\n", dir);
free(dir);
return CL_ETMPDIR;
}
ret = cli_tnef(dir, desc);
if(ret == CL_CLEAN) |
3c91998b |
ret = cli_scandir(dir, ctx); |
f0bc32bd |
if(!cli_leavetemps_flag)
cli_rmdirs(dir);
free(dir);
return ret;
}
|
3c91998b |
static int cli_scanuuencoded(int desc, cli_ctx *ctx) |
3953039b |
{
int ret;
char *dir = cli_gentemp(NULL);
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) |
3c91998b |
ret = cli_scandir(dir, ctx); |
3953039b |
if(!cli_leavetemps_flag)
cli_rmdirs(dir);
free(dir);
return ret;
}
|
bb03e766 |
/* Outlook PST file */
static int cli_scanpst(int desc, cli_ctx *ctx)
{
int ret;
char *dir = cli_gentemp(NULL);
if(mkdir(dir, 0700)) {
cli_dbgmsg("Can't create temporary directory for PST file %s\n", dir);
free(dir);
return CL_ETMPDIR;
}
ret = cli_pst(dir, desc);
if(ret == CL_SUCCESS)
ret = cli_scandir(dir, ctx);
if(!cli_leavetemps_flag)
cli_rmdirs(dir);
free(dir);
return ret;
}
|
3c91998b |
static int cli_scanmail(int desc, cli_ctx *ctx) |
e3aaff8e |
{
char *dir;
int ret;
|
794f3f23 |
cli_dbgmsg("Starting cli_scanmail(), mrec == %u, arec == %u\n", ctx->mrec, ctx->arec); |
e3aaff8e |
|
0c7019c5 |
/* generate the temporary directory */
dir = cli_gentemp(NULL);
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))) { |
8d5e0ac0 |
if(!cli_leavetemps_flag)
cli_rmdirs(dir); |
e3aaff8e |
free(dir);
return ret; |
0c7019c5 |
}
|
3c91998b |
ret = cli_scandir(dir, ctx); |
0c7019c5 |
if(!cli_leavetemps_flag)
cli_rmdirs(dir);
free(dir);
return ret; |
e3aaff8e |
}
|
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;
tmpname = cli_gentemp(NULL);
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);
return CL_EIO;
}
while((bytes = read(desc, buff, sizeof(buff))) > 0) {
size += bytes;
if(ctx->limits && ctx->limits->maxfilesize && (size + sizeof(buff) > ctx->limits->maxfilesize)) {
cli_dbgmsg("cli_scanembpe: Size exceeded (stopped at %lu, max: %lu)\n", size, ctx->limits->maxfilesize);
/* BLOCKMAX should be ignored here */
break;
}
if(cli_writen(fd, buff, bytes) != bytes) {
cli_dbgmsg("cli_scanembpe: Can't write to temporary file\n");
close(fd);
if(!cli_leavetemps_flag)
unlink(tmpname);
free(tmpname);
return CL_EIO;
}
}
if(fsync(fd) == -1) {
cli_dbgmsg("cli_scanembpe: Can't synchronise descriptor %d\n", fd);
close(fd);
if(!cli_leavetemps_flag)
unlink(tmpname);
free(tmpname);
return CL_EFSYNC;
}
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);
if(!cli_leavetemps_flag)
unlink(tmpname);
free(tmpname);
return CL_VIRUS;
}
close(fd);
if(!cli_leavetemps_flag)
unlink(tmpname);
free(tmpname);
/* intentionally ignore possible errors from cli_magic_scandesc */
return CL_CLEAN;
}
|
3c91998b |
static int cli_scanraw(int desc, cli_ctx *ctx, cli_file_t type) |
555c5390 |
{ |
6191ee2c |
int ret = CL_CLEAN, nret = CL_CLEAN; |
bedc58de |
uint8_t ftrec, break_loop = 0; |
555c5390 |
struct cli_matched_type *ftoffset = NULL, *fpt; |
994ae437 |
uint32_t lastzip, lastrar; |
ee99255a |
struct cli_exe_info peinfo; |
555c5390 |
switch(type) {
case CL_TYPE_UNKNOWN_TEXT:
case CL_TYPE_MSEXE: |
ee99255a |
case CL_TYPE_ZIP: |
555c5390 |
ftrec = 1;
break;
default:
ftrec = 0;
}
if(lseek(desc, 0, SEEK_SET) < 0) {
cli_errmsg("cli_scanraw: lseek() failed\n");
return CL_EIO;
}
|
c8b0d9a2 |
ret = cli_scandesc(desc, ctx, ftrec, type, 0, &ftoffset); |
555c5390 |
|
c8b0d9a2 |
if(ret >= CL_TYPENO) { |
555c5390 |
|
d68a73d1 |
if(type == CL_TYPE_UNKNOWN_TEXT) { |
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);
} |
73218de2 |
|
d68a73d1 |
if(nret != CL_VIRUS && (type == CL_TYPE_MSEXE || type == CL_TYPE_ZIP)) {
lastzip = lastrar = 0xdeadbeef;
fpt = ftoffset;
while(fpt) {
switch(fpt->type) {
case CL_TYPE_RARSFX:
if(SCAN_ARCHIVE && type == CL_TYPE_MSEXE && (DCONF_ARCH & ARCH_CONF_RAR)) {
cli_dbgmsg("RAR-SFX signature found at %u\n", (unsigned int) fpt->offset);
nret = cli_scanrar(desc, ctx, fpt->offset, &lastrar);
}
break; |
555c5390 |
|
d68a73d1 |
case CL_TYPE_ZIPSFX:
if(SCAN_ARCHIVE && type == CL_TYPE_MSEXE && (DCONF_ARCH & ARCH_CONF_ZIP)) {
cli_dbgmsg("ZIP-SFX signature found at %u\n", (unsigned int) fpt->offset);
nret = cli_scanzip(desc, ctx, fpt->offset, &lastzip);
}
break; |
d8a5c616 |
|
d68a73d1 |
case CL_TYPE_CABSFX:
if(SCAN_ARCHIVE && type == CL_TYPE_MSEXE && (DCONF_ARCH & ARCH_CONF_CAB)) {
cli_dbgmsg("CAB-SFX signature found at %u\n", (unsigned int) fpt->offset);
nret = cli_scanmscab(desc, ctx, fpt->offset); |
555c5390 |
} |
d68a73d1 |
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;
|
d68a73d1 |
case CL_TYPE_MSEXE:
if(SCAN_PE && ctx->dconf->pe && fpt->offset) { |
ee99255a |
cli_dbgmsg("PE signature found at %u\n", (unsigned int) fpt->offset);
memset(&peinfo, 0, sizeof(struct cli_exe_info));
peinfo.offset = fpt->offset;
lseek(desc, fpt->offset, SEEK_SET);
if(cli_peheader(desc, &peinfo) == 0) {
cli_dbgmsg("*** Detected embedded PE file ***\n");
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;
}
}
ret == CL_TYPE_MAIL ? ctx->mrec++ : ctx->arec++;
if(nret != CL_VIRUS) switch(ret) {
case CL_TYPE_HTML:
if(SCAN_HTML && type == CL_TYPE_UNKNOWN_TEXT && (DCONF_DOC & DOC_CONF_HTML))
nret = cli_scanhtml(desc, ctx);
break;
case CL_TYPE_MAIL:
if(SCAN_MAIL && type == CL_TYPE_UNKNOWN_TEXT && (DCONF_MAIL & MAIL_CONF_MBOX))
nret = cli_scanmail(desc, ctx); |
ee99255a |
break;
|
555c5390 |
default:
break;
} |
3c91998b |
ret == CL_TYPE_MAIL ? ctx->mrec-- : ctx->arec--; |
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; |
9b8e00a0 |
cli_file_t type; |
a7f5fd00 |
struct stat sb;
if(fstat(desc, &sb) == -1) { |
a687d96c |
cli_errmsg("Can't fstat descriptor %d\n", desc); |
a7f5fd00 |
return CL_EIO;
} |
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"); |
322bfd03 |
return CL_EMALFDB; |
e3aaff8e |
}
|
3c91998b |
if(!ctx->options) { /* raw mode (stdin, etc.) */ |
b68d11d2 |
cli_dbgmsg("Raw mode: No support for special files\n"); |
73218de2 |
if((ret = cli_scandesc(desc, ctx, 0, 0, 0, NULL)) == CL_VIRUS) |
3c91998b |
cli_dbgmsg("%s found in descriptor %d\n", *ctx->virname, desc); |
d6b5ae47 |
return ret;
}
|
3c91998b |
if(SCAN_ARCHIVE && ctx->limits && ctx->limits->maxreclevel)
if(ctx->arec > ctx->limits->maxreclevel) { |
794f3f23 |
cli_dbgmsg("Archive recursion limit exceeded (arec == %u).\n", ctx->arec); |
031555fe |
if(BLOCKMAX) { |
3c91998b |
*ctx->virname = "Archive.ExceededRecursionLimit"; |
031555fe |
return CL_VIRUS;
} |
467f8b1e |
return CL_CLEAN; |
22275b15 |
} |
e3aaff8e |
|
22275b15 |
if(SCAN_MAIL) |
3c91998b |
if(ctx->mrec > MAX_MAIL_RECURSION) { |
794f3f23 |
cli_dbgmsg("Mail recursion level exceeded (mrec == %u).\n", ctx->mrec); |
22275b15 |
/* return CL_EMAXREC; */
return CL_CLEAN;
} |
e3aaff8e |
|
467f8b1e |
lseek(desc, 0, SEEK_SET); |
bd988961 |
type = cli_filetype2(desc, ctx->engine); |
2b259453 |
lseek(desc, 0, SEEK_SET); |
6d6e8271 |
|
3c91998b |
if(type != CL_TYPE_DATA && ctx->engine->sdb) { |
0643a2c0 |
if((ret = cli_scanraw(desc, ctx, type)) == CL_VIRUS) |
555c5390 |
return CL_VIRUS;
lseek(desc, 0, SEEK_SET);
}
|
3c91998b |
type == CL_TYPE_MAIL ? ctx->mrec++ : ctx->arec++; |
888f5794 |
|
467f8b1e |
switch(type) { |
3805ebcb |
case CL_TYPE_RAR: |
bc93eda0 |
if(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)) |
994ae437 |
ret = cli_scanzip(desc, ctx, 0, NULL); |
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: |
68a6f51f |
#ifdef HAVE_BZLIB_H |
bc93eda0 |
if(SCAN_ARCHIVE && (DCONF_ARCH & ARCH_CONF_BZ)) |
3c91998b |
ret = cli_scanbzip(desc, ctx); |
e3aaff8e |
#endif |
467f8b1e |
break; |
6d6e8271 |
|
faaf436a |
case CL_TYPE_NULSFT:
if(SCAN_ARCHIVE)
ret = cli_scannulsft(desc, ctx, 0);
break;
|
3805ebcb |
case CL_TYPE_MSSZDD: |
bc93eda0 |
if(SCAN_ARCHIVE && (DCONF_ARCH & ARCH_CONF_SZDD)) |
3c91998b |
ret = cli_scanszdd(desc, ctx); |
341e5433 |
break;
|
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;
|
52c2a8bd |
case CL_TYPE_RTF: |
bc93eda0 |
if(DCONF_DOC & DOC_CONF_RTF)
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;
|
bb03e766 |
case CL_TYPE_PST: |
bc93eda0 |
if(SCAN_MAIL && (DCONF_MAIL & MAIL_CONF_PST)) |
bb03e766 |
ret = cli_scanpst(desc, ctx);
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 |
|
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;
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)) |
3c91998b |
ret = cli_scanriff(desc, ctx->virname); |
e57fa318 |
break;
|
7afdc309 |
case CL_TYPE_GRAPHICS: |
bc93eda0 |
if(SCAN_ALGO && (DCONF_OTHER & OTHER_CONF_JPEG)) |
3c91998b |
ret = cli_scanjpeg(desc, ctx->virname); |
7afdc309 |
break;
|
798308de |
case CL_TYPE_PDF: |
c5107e70 |
if(SCAN_PDF && (DCONF_DOC & DOC_CONF_PDF)) |
3c91998b |
ret = cli_scanpdf(desc, ctx); |
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;
|
bf45bf13 |
case CL_TYPE_SIS: |
bc93eda0 |
if(SCAN_ARCHIVE && (DCONF_ARCH & ARCH_CONF_SIS)) |
3c91998b |
ret = cli_scansis(desc, ctx); |
bf45bf13 |
break;
|
3805ebcb |
case CL_TYPE_DATA: |
467f8b1e |
/* it could be a false positive and a standard DOS .COM file */
{
struct stat s;
if(fstat(desc, &s) == 0 && S_ISREG(s.st_mode) && s.st_size < 65536) |
3805ebcb |
type = CL_TYPE_UNKNOWN_DATA; |
467f8b1e |
}
|
3805ebcb |
case CL_TYPE_UNKNOWN_DATA: |
3c91998b |
ret = cli_check_mydoom_log(desc, ctx->virname); |
467f8b1e |
break; |
216a697f |
default:
break; |
e3aaff8e |
}
|
3c91998b |
type == CL_TYPE_MAIL ? ctx->mrec-- : ctx->arec--; |
467f8b1e |
|
3c91998b |
if(type != CL_TYPE_DATA && ret != CL_VIRUS && !ctx->engine->sdb) { |
00f42159 |
if(cli_scanraw(desc, ctx, type) == CL_VIRUS) |
e3aaff8e |
return CL_VIRUS; |
46c2e927 |
} |
e3aaff8e |
|
3c91998b |
ctx->arec++; |
77e4bb11 |
lseek(desc, 0, SEEK_SET);
switch(type) {
/* 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 |
} |
3c91998b |
ctx->arec--; |
77e4bb11 |
|
322bfd03 |
if(ret == CL_EFORMAT) { |
6ee0243f |
cli_dbgmsg("Descriptor[%d]: %s\n", desc, cl_strerror(CL_EFORMAT)); |
322bfd03 |
return CL_CLEAN;
} else {
return ret;
} |
e3aaff8e |
}
|
5612732c |
int cl_scandesc(int desc, const char **virname, unsigned long int *scanned, const struct cl_engine *engine, const struct cl_limits *limits, unsigned int options) |
e3aaff8e |
{ |
3c91998b |
cli_ctx ctx; |
25380806 |
int rc; |
3c91998b |
memset(&ctx, '\0', sizeof(cli_ctx));
ctx.engine = engine;
ctx.virname = virname;
ctx.limits = limits;
ctx.scanned = scanned;
ctx.options = options; |
25380806 |
ctx.found_possibly_unwanted = 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 |
}
|
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;
}
|
5612732c |
int cl_scanfile(const char *filename, const char **virname, unsigned long int *scanned, const struct cl_engine *engine, const struct cl_limits *limits, unsigned int options) |
e3aaff8e |
{
int fd, ret;
|
ece009c0 |
|
b58fdfc2 |
if((fd = open(filename, O_RDONLY|O_BINARY)) == -1) |
e3aaff8e |
return CL_EOPEN;
|
5612732c |
ret = cl_scandesc(fd, virname, scanned, engine, limits, options); |
e3aaff8e |
close(fd);
return ret;
} |