CVE-2022-31625

En PHP versiones 7.4.x anteriores a 7.4.30, 8.0.x anteriores a 8.0.20 y 8.1.x anteriores a 8.1.7, cuando es usada la extensión de la base de datos Postgres, el suministro de parámetros no válidos a la consulta parametrizada puede conllevar que PHP intente liberar memoria usando datos no inicializados como punteros. Esto podría conllevar a una vulnerabilidad RCE o una denegación de servicio

A vulnerability was found in PHP due to an uninitialized array in pg_query_params() function. When using the Postgres database extension, supplying invalid parameters to the parameterized query may lead to PHP attempting to free memory, using uninitialized data as pointers. This flaw allows a remote attacker with the ability to control query parameters to execute arbitrary code on the system or may cause a denial of service.

USN-5479-1 fixed vulnerabilities in PHP. Unfortunately that update for CVE-2022-31625 was incomplete for Ubuntu 18.04 LTS. This update fixes the problem. Charles Fol discovered that PHP incorrectly handled initializing certain arrays when handling the pg_query_params function. A remote attacker could use this issue to cause PHP to crash, resulting in a denial of service, or possibly execute arbitrary code. Charles Fol discovered that PHP incorrectly handled passwords in mysqlnd. A remote attacker could use this issue to cause PHP to crash, resulting in a denial of service, or possibly execute arbitrary code.