Fix from http://antinode.info/ftp/info-zip/unzip60/zipinfo.c
diff --git a/zipinfo.c b/zipinfo.c
index a92bca9..8f8e729 100644
--- a/zipinfo.c
+++ b/zipinfo.c
@@ -1,5 +1,5 @@
 /*
-  Copyright (c) 1990-2009 Info-ZIP.  All rights reserved.
+  Copyright (c) 1990-2016 Info-ZIP.  All rights reserved.
 
   See the accompanying file LICENSE, version 2009-Jan-02 or later
   (the contents of which are also included in unzip.h) for terms of use.
@@ -1921,7 +1921,18 @@ static int zi_short(__G)   /* return PK-type error code */
         ush  dnum=(ush)((G.crec.general_purpose_bit_flag>>1) & 3);
         methbuf[3] = dtype[dnum];
     } else if (methnum >= NUM_METHODS) {   /* unknown */
-        sprintf(&methbuf[1], "%03u", G.crec.compression_method);
+        /* 2016-12-05 SMS.
+         * https://launchpad.net/bugs/1643750  CVE-2016-9844.
+         * Unexpectedly large compression methods overflow
+         * &methbuf[].  Use the old, three-digit decimal format
+         * for values which fit.  Otherwise, sacrifice the "u",
+         * and use four-digit hexadecimal.
+         */
+        if (G.crec.compression_method <= 999) {
+            sprintf( &methbuf[ 1], "%03u", G.crec.compression_method);
+        } else {
+            sprintf( &methbuf[ 0], "%04X", G.crec.compression_method);
+        }
     }
 
     for (k = 0;  k < 15;  ++k)