Use-after-free vulnerability in Libinfo in Apple Mac OS X 10.3.9 through 10.4.9 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via unspecified vectors involving crafted web pages that trigger certain error conditions that are not properly reported in certain circumstances, resulting in accessing deallocated memory.
http://www.vupen.com/english/advisories/2007/1470
http://www.us-cert.gov/cas/techalerts/TA07-109A.html
http://www.securitytracker.com/id?1017942
http://www.securityfocus.com/bid/23569
http://secunia.com/advisories/24966
http://lists.apple.com/archives/Security-announce/2007/Apr/msg00001.html