CVE-2007-1216

Una vulnerabilidad de Doble Liberación en la biblioteca GSS-API (lib/gssapi/krb5/k5unseal.c), como la utiliza el demonio de administración de Kerberos (kadmind) en MIT krb5 anterior a versión 1.6.1, cuando es usado con el método de autenticación proporcionado por la biblioteca RPC de RPCSEC_GSS, permite a los usuarios autenticados remotamente ejecutar código arbitrario y modificar la base de datos de claves de Kerberos mediante un mensaje con una "an invalid direction encoding".

A vulnerability was found in the username handling of the MIT krb5 telnet daemon. A remote attacker that could access the telnet port of a target machine could login as root without requiring a password. Buffer overflows in the kadmin server daemon were discovered that could be exploited by a remote attacker able to access the KDC. Successful exploitation could allow for the execution of arbitrary code with the privileges of the KDC or kadmin server processes. Finally, a double-free flaw was discovered in the GSSAPI library used by the kadmin server daemon, which could lead to a denial of service condition or the execution of arbitrary code with the privileges of the KDC or kadmin server processes.