gnu/packages/patches/unzip-CVE-2014-8140.patch

   1 From: sms
   2 Subject: Fix CVE-2014-8140: out-of-bounds write issue in test_compr_eb()
   3 Bug-Debian: http://bugs.debian.org/773722
   4
   5 --- a/extract.c
   6 +++ b/extract.c
   7 @@ -2234,10 +2234,17 @@
   8      if (compr_offset < 4)                /* field is not compressed: */
   9          return PK_OK;                    /* do nothing and signal OK */
  10
  11 +    /* Return no/bad-data error status if any problem is found:
  12 +     *    1. eb_size is too small to hold the uncompressed size
  13 +     *       (eb_ucsize).  (Else extract eb_ucsize.)
  14 +     *    2. eb_ucsize is zero (invalid).  2014-12-04 SMS.
  15 +     *    3. eb_ucsize is positive, but eb_size is too small to hold
  16 +     *       the compressed data header.
  17 +     */
  18      if ((eb_size < (EB_UCSIZE_P + 4)) ||
  19 -        ((eb_ucsize = makelong(eb+(EB_HEADSIZE+EB_UCSIZE_P))) > 0L &&
  20 -         eb_size <= (compr_offset + EB_CMPRHEADLEN)))
  21 -        return IZ_EF_TRUNC;               /* no compressed data! */
  22 +     ((eb_ucsize = makelong( eb+ (EB_HEADSIZE+ EB_UCSIZE_P))) == 0L) ||
  23 +     ((eb_ucsize > 0L) && (eb_size <= (compr_offset + EB_CMPRHEADLEN))))
  24 +        return IZ_EF_TRUNC;             /* no/bad compressed data! */
  25
  26      if (
  27  #ifdef INT_16BIT