CVE-2014-5353

La función krb5_ldap_get_password_policy_from_dn en plugins/kdb/ldap/libkdb_ldap/ldap_pwd_policy.c en MIT Kerberos 5 (también conocido como krb5) anterior a 1.13.1, cuando el KDC utiliza LDAP, permite a usuarios remotos autenticados causar una denegación de servicio (caída del demonio) a través de una consulta LDAP con éxito pero sin resultados, tal y como fue demostrado mediante el uso de un tipo de objeto incorrecto para una política de contraseñas.

If kadmind were used with an LDAP back end for the KDC database, a remote, authenticated attacker who has the permissions to set the password policy could crash kadmind by attempting to use a named ticket policy object as a password policy for a principal.

A NULL pointer dereference flaw was found in the MIT Kerberos SPNEGO acceptor for continuation tokens. A remote, unauthenticated attacker could use this flaw to crash a GSSAPI-enabled server application. A buffer overflow was found in the KADM5 administration server when it was used with an LDAP back end for the KDC database. A remote, authenticated attacker could potentially use this flaw to execute arbitrary code on the system running kadmind. A use-after-free flaw was found in the way the MIT Kerberos libgssapi_krb5 library processed valid context deletion tokens. An attacker able to make an application using the GSS-API library call the gss_process_context_token() function could use this flaw to crash that application.