Heap-based buffer underflow in the xmlParseAttValueComplex function in parser.c in libxml2 2.9.0 and earlier, as used in Google Chrome before 23.0.1271.91 and other products, allows remote attackers to cause a denial of service or possibly execute arbitrary code via crafted entities in an XML document.

References

• https://nvd.nist.gov/vuln/detail/CVE-2012-5134
• https://bugzilla.redhat.com/show_bug.cgi?id=880466
• https://code.google.com/p/chromium/issues/detail?id=158249
• https://exchange.xforce.ibmcloud.com/vulnerabilities/80294
• http://git.gnome.org/browse/libxml2/commit/?id=6a36fbe3b3e001a8a840b5c1fdd81cefc9947f0d
• http://googlechromereleases.blogspot.com/2012/11/stable-channel-update.html
• http://lists.apple.com/archives/security-announce/2013/Oct/msg00009.html
• http://lists.apple.com/archives/security-announce/2013/Sep/msg00006.html
• http://lists.opensuse.org/opensuse-security-announce/2012-12/msg00004.html
• http://lists.opensuse.org/opensuse-security-announce/2013-01/msg00023.html
• http://lists.opensuse.org/opensuse-security-announce/2013-11/msg00002.html
• http://rhn.redhat.com/errata/RHSA-2012-1512.html
• http://rhn.redhat.com/errata/RHSA-2013-0217.html
• http://secunia.com/advisories/51448
• http://secunia.com/advisories/54886
• http://secunia.com/advisories/55568
• http://support.apple.com/kb/HT5934
• http://support.apple.com/kb/HT6001
• http://www.debian.org/security/2012/dsa-2580
• http://www.mandriva.com/security/advisories?name=MDVSA-2013:056
• http://www.securityfocus.com/bid/56684
• http://www.securitytracker.com/id?1027815
• http://www.ubuntu.com/usn/USN-1656-1