Integer overflow in the xml_utf8_decode function in ext/xml/xml.c in PHP before 5.2.11 makes it easier for remote attackers to bypass cross-site scripting (XSS) and SQL injection protection mechanisms via a crafted string that uses overlong UTF-8 encoding, a different vulnerability than CVE-2010-3870.
http://www.vupen.com/english/advisories/2011/0077
http://www.vupen.com/english/advisories/2011/0021
http://www.vupen.com/english/advisories/2011/0020
http://www.vupen.com/english/advisories/2010/3081
http://www.ubuntu.com/usn/USN-1042-1
http://www.securityfocus.com/bid/44889
http://www.redhat.com/support/errata/RHSA-2011-0195.html
http://www.redhat.com/support/errata/RHSA-2010-0919.html
http://secunia.com/advisories/42812
http://secunia.com/advisories/42410
http://lists.fedoraproject.org/pipermail/package-announce/2011-January/052845.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-January/052836.html