LibTIFF could be made to crash or run programs as your login if it opened a specially crafted file.
It was discovered that LibTIFF incorrectly handled certain malformed images using the PixarLog compression format. If a user or automated system were tricked into opening a specially crafted TIFF image, a remote attacker could crash the application, leading to a denial of service, or possibly execute arbitrary code with user privileges. (CVE-2012-4447)
15 November 2012
A security issue affects these releases of Ubuntu and its derivatives:
LibTIFF could be made to crash or run programs as your login if it opened a specially crafted file.
It was discovered that LibTIFF incorrectly handled certain malformed images using the PixarLog compression format. If a user or automated system were tricked into opening a specially crafted TIFF image, a remote attacker could crash the application, leading to a denial of service, or possibly execute arbitrary code with user privileges. (CVE-2012-4447)
Huzaifa S. Sidhpurwala discovered that the ppm2tiff tool incorrectly handled certain malformed PPM images. If a user or automated system were tricked into opening a specially crafted PPM image, a remote attacker could crash the application, leading to a denial of service, or possibly execute arbitrary code with user privileges. (CVE-2012-4564)
The problem can be corrected by updating your system to the following package versions:
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.
Vulmon