CVE-2022-3627

LibTIFF versión 4.4.0, presenta una escritura fuera de límites en _TIFFmemcpy en el archivo libtiff/tif_unix.c:346 cuando se llama desde extractImageSection, tools/tiffcrop.c:6860, permitiendo a atacantes causar una denegación de servicio por medio de un archivo tiff diseñado. Para los usuarios que compilan libtiff desde las fuentes, la corrección está disponible con el commit 236b7191

An out-of-bounds write flaw was found in the _TIFFmemcpy function in libtiff/tif_unix.c in the libtiff package. By persuading a victim to open a specially-crafted TIFF image file, a remote attacker could cause a denial of service condition.

It was discovered that LibTIFF incorrectly handled certain memory operations when using tiffcrop. An attacker could trick a user into processing a specially crafted tiff image file and potentially use this issue to cause a denial of service. This issue only affected Ubuntu 22.10. It was discovered that LibTIFF did not properly perform bounds checking in certain operations when using tiffcrop. An attacker could trick a user into processing a specially crafted tiff image file and potentially use this issue to allow for information disclosure or to cause the application to crash. This issue only affected to Ubuntu 18.04 LTS, Ubuntu 20.04 LTS and Ubuntu 22.04 LTS.