Race condition in AFP Server in Apple Mac OS X 10.5.6 allows local users to cause a denial of service (infinite loop) via unspecified vectors related to "file enumeration logic."
http://www.vupen.com/english/advisories/2009/0422
http://www.securityfocus.com/bid/33812
http://www.securityfocus.com/bid/33759
http://support.apple.com/kb/HT3438
http://secunia.com/advisories/33937
http://lists.apple.com/archives/security-announce/2009/Feb/msg00000.html