CVE-2013-0255

PostgreSQL v9.2.x anteriores a v9.2.3, v9.1.x anteriores a v9.1.8, v9.0.x anteriores a v9.0.12, v8.4.x anteriores a v8.4.16, y v8.3.x anteriores a v8.3.23 no declaran correctamente la función enum_recv en backend/utils/adt/enum.c, lo cual provoca que se invoque con argumentos incorrectos y permitiendo que usuarios remotos autenticados causen una denegación de servicio (caída del servidor)o la lectura de procesos de memoria a través de un comando SQL manipulado que provoca un error de indexación del array y lectura fuera de rango.

PostgreSQL is an advanced object-relational database management system. An array index error, leading to a heap-based out-of-bounds buffer read flaw, was found in the way PostgreSQL performed certain error processing using enumeration types. An unprivileged database user could issue a specially crafted SQL query that, when processed by the server component of the PostgreSQL service, would lead to a denial of service or disclosure of certain portions of server memory. A flaw was found in the way the pgcrypto contrib module of PostgreSQL initialized its internal random number generator. This could lead to random numbers with less bits of entropy being used by certain pgcrypto functions, possibly allowing an attacker to conduct other attacks.