src/patches/bzip2-1.0.3-bzgrep_security-1.patch

   1 Submitted By: Ken Moffat <ken@kenmoffat.uklinux.net>
   2 Date: 2005-08-09
   3 Initial Package Version: 1.0.3
   4 Upstream Status: Unknown.
   5 Origin: Jyri Ryska (RedHat) for fedora3
   6 Description: Fixes filename sanitisation in bzgrep.
   7  This fixes CAN-2005-0758 (if a user can be tricked into running
   8 bzgrep in an untrusted directory containing files with carefully
   9 crafted filenames, arbitrary commands could be executed as the user
  10 running bzgrep).  Risk is reported as low.  I've modified it to force
  11 the interpreter to be bash, some of the other shells in use won't
  12 like the bash syntax.
  13
  14 diff -Naur bzip2-1.0.3/bzgrep bzip2-1.0.3-new/bzgrep
  15 --- bzip2-1.0.3/bzgrep  2004-10-09 12:29:32.000000000 +0100
  16 +++ bzip2-1.0.3-new/bzgrep      2005-08-09 21:36:37.000000000 +0100
  17 @@ -1,4 +1,4 @@
  18 -#!/bin/sh
  19 +#!/bin/bash
  20
  21  # Bzgrep wrapped for bzip2,
  22  # adapted from zgrep by Philippe Troin <phil@fifi.org> for Debian GNU/Linux.
  23 @@ -63,7 +63,11 @@
  24      bzip2 -cdfq "$i" | $grep $opt "$pat"
  25      r=$?
  26    else
  27 -    bzip2 -cdfq "$i" | $grep $opt "$pat" | sed "s|^|${i}:|"
  28 +    j=${i//\\/\\\\}
  29 +    j=${j//|/\\|}
  30 +    j=${j//&/\\&}
  31 +    j=`printf "%s" "$j" | tr '\n' ' '`
  32 +    bzip2 -cdfq "$i" | $grep $opt "$pat" | sed "s|^|${j}:|"
  33      r=$?
  34    fi
  35    test "$r" -ne 0 && res="$r"