AirPort Utility before 5.5.1 for Apple AirPort Base Station does not properly distribute MAC address ACLs to network extenders, which allows remote attackers to bypass intended access restrictions via an 802.11 authentication frame.
https://exchange.xforce.ibmcloud.com/vulnerabilities/57434
http://www.vupen.com/english/advisories/2010/0778
http://www.securityfocus.com/bid/39134
http://support.apple.com/kb/HT3958
http://securitytracker.com/id?1023801
http://secunia.com/advisories/39160
http://lists.apple.com/archives/security-announce/2010//Mar/msg00004.html