CVE-2015-9253

Se ha descubierto un problema en PHP en versiones 7.3.x anteriores a la 7.3.0alpha3, versiones 7.2.x anteriores a la 7.2.8 y anteriores a la 7.1.20. El proceso maestro php-fpm reinicia un proceso hijo en un bucle infinito cuando se utilizan funciones de ejecución de programas (por ejemplo, passthru, exec, shell_exec o system) con un flujo non-blocking-STDIN y consumir el espacio del disco con un gran volumen de logs de error, tal y como queda demostrado con un ataque a un cliente de una instalación de alojamiento compartido.

USN-4279-1 fixed vulnerabilities in PHP. The updated packages caused a regression. This update fixes the problem. It was discovered that PHP incorrectly handled certain scripts. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 12.04 ESM, Ubuntu 14.04 ESM and Ubuntu 16.04 LTS. It was discovered that PHP incorrectly handled certain inputs. An attacker could possibly use this issue to expose sensitive information. It was discovered that PHP incorrectly handled certain inputs. An attacker could possibly use this issue to execute arbitrary code. This issue only affected Ubuntu 14.04 ESM, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS and Ubuntu 19.10. Various other issues were also addressed.