CVE-2018-20184

En GraphicsMagick 1.4 snapshot-20181209 Q8, hay un desbordamiento de búfer basado en memoria dinámica (heap) en la función WriteTGAImage de tga.c, lo que permite que los atacantes provoquen una denegación de servicio (DoS) mediante un archivo de imagen manipulado. Esto se debe a que el número de filas o columnas puede sobrepasar las restricciones de dimensiones de pixel de la especificación TGA.

It was discovered that GraphicsMagick was not properly performing bounds checks when processing TGA image files, which could lead to a heap buffer overflow. If a user or automated system were tricked into processing a specially crafted TGA image file, an attacker could possibly use this issue to cause a denial of service or execute arbitrary code. This issue only affected Ubuntu 14.04 ESM and Ubuntu 16.04 ESM. It was discovered that GraphicsMagick was not properly validating bits per pixel data when processing DIB image files. If a user or automated system were tricked into processing a specially crafted DIB image file, an attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.