The LDAP login feature in bos.rte.security 6.1.6.4 in IBM AIX 6.1, when ldap_auth is enabled in ldap.cfg, allows remote attackers to bypass authentication via a login attempt with an arbitrary password.
http://www.vupen.com/english/advisories/2011/0836
http://www-01.ibm.com/support/docview.wss?uid=isg1IZ97416
http://securitytracker.com/id?1025273
http://secunia.com/advisories/43968
http://aix.software.ibm.com/aix/efixes/security/ldapauth_advisory.asc