Mandriva Linux Security Advisory 2011-056 - chain.c in back-ldap in OpenLDAP 2.4.x before 2.4.24, when a master-slave configuration with a chain overlay and ppolicy_forward_updates is used, allows remote authenticated users to bypass external-program authentication by sending an invalid password to a slave server. bind.cpp in back-ndb in OpenLDAP 2.4.x before 2.4.24 does not require authentication for the root Distinguished Name, which allows remote attackers to bypass intended access restrictions via an arbitrary password. modrdn.c in slapd in OpenLDAP 2.4.x before 2.4.24 allows remote attackers to cause a denial of service via a relative Distinguished Name that contains an empty value for the OldDN field. The updated packages have been patched to correct these issues.
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