CVE-2015-0241

La función to_char en PostgreSQL versiones anteriores a 9.0.19, versiones 9.1.x anteriores a 9.1.15, versiones 9.2.x anteriores a 9.2.10, versiones 9.3.x anteriores a 9.3.6 y versiones 9.4.x anteriores a 9.4.1, permite a usuarios autenticados remotos causar una negación de servicio (bloqueo) o posiblemente ejecutar código arbitrario por medio de un (1) gran número de dígitos cuando se procesa una plantilla de formato numérico, que desencadena una lectura excesiva del búfer, o una (2) plantilla de formato de marca de tiempo, que desencadena un desbordamiento del búfer.

A buffer overflow flaw was found in the way PostgreSQL handled certain numeric formatting. An authenticated database user could use a specially crafted timestamp formatting template to cause PostgreSQL to crash or, under certain conditions, execute arbitrary code with the permissions of the user running PostgreSQL.

Multiple vulnerabilities has been discovered and corrected in Stephen Frost discovered that PostgreSQL incorrectly displayed certain values in error messages. An authenticated user could gain access to seeing certain values, contrary to expected permissions. Andres Freund, Peter Geoghegan and Noah Misch discovered that PostgreSQL incorrectly handled buffers in to_char functions. An authenticated attacker could possibly use this issue to cause PostgreSQL to crash, resulting in a denial of service, or possibly execute arbitrary code. It was discovered that PostgreSQL incorrectly handled memory in the pgcrypto extension. An authenticated attacker could possibly use this issue to cause PostgreSQL to crash, resulting in a denial of service, or possibly execute arbitrary code. Emil Lenngren discovered that PostgreSQL incorrectly handled extended protocol message reading. An authenticated attacker could possibly use this issue to cause PostgreSQL to crash, resulting in a denial of service, or possibly inject query messages. This advisory provides the latest version of PostgreSQL that is not vulnerable to these issues.