CVE-2012-4202

Un desbordamiento de búfer basado en memoria dinámica ('heap') en la función image::RasterImage::DrawFrameTo en Mozilla Firefox antes de v17.0, Firefox ESR v10.x antes de v10.0.11, Thunderbird antes de v17.0, Thunderbird ESR v10.x antes de v10.0.11, y SeaMonkey antes de v2.14 permite a atacantes remotos ejecutar código de su elección a través de una imagen GIF modificada.

USN-1638-1 fixed vulnerabilities in Firefox. This update provides an updated ubufox package for use with the latest Firefox. Gary Kwong, Jesse Ruderman, Christian Holler, Bob Clary, Kyle Huey, Ed Morley, Chris Lord, Boris Zbarsky, Julian Seward, Bill McCloskey, and Andrew McCreight discovered multiple memory safety issues affecting Firefox. If the user were tricked into opening a specially crafted page, an attacker could possibly exploit these to cause a denial of service via application crash, or potentially execute code with the privileges of the user invoking Firefox. Atte Kettunen discovered a buffer overflow while rendering GIF format images. An attacker could exploit this to possibly execute arbitrary code as the user invoking Firefox. Various other issues were also addressed.