CVE-2022-31630

En versiones de PHP anteriores a 7.4.33, 8.0.25 y 8.2.12, cuando se usa la función imageloadfont() en la extensión gd, es posible proporcionar un archivo de fuente especialmente manipulado, como si la fuente cargada se usa con imagechar() función, se utilizará la lectura fuera del búfer asignado. Esto puede provocar fallos o divulgación de información confidencial.

An out-of-bounds read flaw was found in PHP due to insufficient input validation in the imageloadfont() function. This flaw allows a remote attacker to pass specially crafted data to the web application, trigger an out-of-bounds read error, and read the contents of memory on the system.

It was discovered that PHP incorrectly handled certain gzip files. An attacker could possibly use this issue to cause a denial of service. It was discovered that PHP incorrectly handled certain cookies. An attacker could possibly use this issue to compromise the data It was discovered that PHP incorrectly handled certain image fonts. An attacker could possibly use this issue to expose sensitive information. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.10, and Ubuntu 22.04 LTS.