CVE-2014-0061

Las funciones de validación para los lenguajes procedurales (PLs) en PostgreSQL anterior a 8.4.20, 9.0.x anterior a 9.0.16, 9.1.x anterior a 9.1.12, 9.2.x anterior a 9.2.7 y 9.3.x anterior a 9.3.3 permiten a usuarios remotos autenticados ganar privilegios a través de una función que (1) está definida en otro lenguaje o (2) no está permitida su llamada directa por el usuario debido a permisos.

Multiple vulnerabilities has been discovered and corrected in postgresql. Granting a role without ADMIN OPTION is supposed to prevent the grantee from adding or removing members from the granted role, but this restriction was easily bypassed by doing SET ROLE first. The security impact is mostly that a role member can revoke the access of others, contrary to the wishes of his grantor. Unapproved role member additions are a lesser concern, since an uncooperative role member could provide most of his rights to others anyway by creating views or SECURITY DEFINER functions. The primary role of PL validator functions is to be called implicitly during CREATE FUNCTION, but they are also normal SQL functions that a user can call explicitly. Calling a validator on a function actually written in some other language was not checked for and could be exploited for privilege-escalation purposes. Various other issues have also been addressed.