CVE-2020-27770

Debido a la falta de comprobación para el valor 0 de "replace_extent", es posible que el desplazamiento "p" se desborde en la función SubstituteString(), lo que podría afectar la disponibilidad de la aplicación. Esto podría ser provocado por un archivo de entrada diseñado que es procesado por ImageMagick. Este fallo afecta a ImageMagick versiones anteriores a 7.0.8-68

It was discovered that ImageMagick incorrectly handled certain values when processing XPM image data or large images. If a user or automated system using ImageMagick were tricked into opening a specially crafted image, an attacker could exploit this to cause a denial of service or possibly execute code with the privileges of the user invoking the program. Suhwan Song discovered that ImageMagick incorrectly handled memory when processing PNG,PALM,MIFF image data. If a user or automated system using ImageMagick were tricked into opening a specially crafted image, an attacker could exploit this to cause a denial of service or possibly execute code with the privileges of the user invoking the program.