utils/unzip/patches/008-cve-2014-9913-unzip-buffer-overflow.patch

   1 From: "Steven M. Schweda" <sms@antinode.info>
   2 Subject: Fix CVE-2014-9913, buffer overflow in unzip
   3 Bug: https://sourceforge.net/p/infozip/bugs/27/
   4 Bug-Debian: https://bugs.debian.org/847485
   5 Bug-Ubuntu: https://launchpad.net/bugs/387350
   6 X-Debian-version: 6.0-21
   7
   8 --- a/list.c
   9 +++ b/list.c
  10 @@ -339,7 +339,18 @@ int list_files(__G)    /* return PK-type
  11                  G.crec.compression_method == ENHDEFLATED) {
  12                  methbuf[5] = dtype[(G.crec.general_purpose_bit_flag>>1) & 3];
  13              } else if (methnum >= NUM_METHODS) {
  14 -                sprintf(&methbuf[4], "%03u", G.crec.compression_method);
  15 +                /* 2013-02-26 SMS.
  16 +                 * http://sourceforge.net/p/infozip/bugs/27/  CVE-2014-9913.
  17 +                 * Unexpectedly large compression methods overflow
  18 +                 * &methbuf[].  Use the old, three-digit decimal format
  19 +                 * for values which fit.  Otherwise, sacrifice the
  20 +                 * colon, and use four-digit hexadecimal.
  21 +                 */
  22 +                if (G.crec.compression_method <= 999) {
  23 +                    sprintf( &methbuf[ 4], "%03u", G.crec.compression_method);
  24 +                } else {
  25 +                    sprintf( &methbuf[ 3], "%04X", G.crec.compression_method);
  26 +                }
  27              }
  28
  29  #if 0       /* GRR/Euro:  add this? */