cups is vulnerable to remote code execution (RCE). The attack exists because of LZW decompressor in the LWZReadByte function in giftoppm.c in the David Koblas GIF decoder in PBMPLUS, as used in the gif_read_lzw function in filter/image-gif.c in CUPS.
cups.org/str.php?L3867
git.gnome.org/browse/gimp/commit/?id=376ad788c1a1c31d40f18494889c383f6909ebfc
lists.fedoraproject.org/pipermail/package-announce/2011-August/064600.html
lists.fedoraproject.org/pipermail/package-announce/2011-August/064873.html
lists.fedoraproject.org/pipermail/package-announce/2011-September/065527.html
lists.fedoraproject.org/pipermail/package-announce/2011-September/065539.html
lists.fedoraproject.org/pipermail/package-announce/2011-September/065550.html
lists.fedoraproject.org/pipermail/package-announce/2011-September/065651.html
rhn.redhat.com/errata/RHSA-2012-1180.html
rhn.redhat.com/errata/RHSA-2012-1181.html
secunia.com/advisories/45621
secunia.com/advisories/45900
secunia.com/advisories/45945
secunia.com/advisories/45948
secunia.com/advisories/46024
secunia.com/advisories/48236
secunia.com/advisories/48308
secunia.com/advisories/50737
security.gentoo.org/glsa/glsa-201209-23.xml
www.debian.org/security/2011/dsa-2354
www.debian.org/security/2012/dsa-2426
www.mandriva.com/security/advisories?name=MDVSA-2011:146
www.mandriva.com/security/advisories?name=MDVSA-2011:167
www.openwall.com/lists/oss-security/2011/08/10/10
www.redhat.com/support/errata/RHSA-2011-1635.html
www.securityfocus.com/bid/49148
www.securitytracker.com/id?1025929
www.swi-prolog.org/bugzilla/show_bug.cgi?id=7#c4
www.ubuntu.com/usn/USN-1207-1
www.ubuntu.com/usn/USN-1214-1
access.redhat.com/errata/RHSA-2011:1635
access.redhat.com/security/updates/classification/#low
bugzilla.redhat.com/show_bug.cgi?id=727800
bugzilla.redhat.com/show_bug.cgi?id=730338