Heap-based buffer overflow in CoreFoundation in Mac OS X and OS X Server 10.4 through 10.4.3 allows remote attackers to execute arbitrary code via unknown attack vectors involving "validation of URLs."
https://exchange.xforce.ibmcloud.com/vulnerabilities/23329
http://www.vupen.com/english/advisories/2005/2659
http://www.securityfocus.com/bid/15647
http://securitytracker.com/id?1015285