Off-by-one error in libxml in Apple Safari before 5.0.6 allows remote attackers to execute arbitrary code or cause a denial of service (heap-based buffer overflow and application crash) via a crafted web site.
http://www.redhat.com/support/errata/RHSA-2011-1749.html
http://www.mandriva.com/security/advisories?name=MDVSA-2011:188
http://www.debian.org/security/2012/dsa-2394
http://support.apple.com/kb/HT5001
http://support.apple.com/kb/HT4999
http://support.apple.com/kb/HT4808
http://rhn.redhat.com/errata/RHSA-2013-0217.html
http://lists.apple.com/archives/security-announce/2011//Jul/msg00002.html
http://lists.apple.com/archives/Security-announce/2011//Oct/msg00002.html
http://lists.apple.com/archives/Security-announce/2011//Oct/msg00001.html