USN-3213-1: GD library vulnerabilities

28 February 2017

libgd2 vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 16.10
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS

Summary

The GD library could be made to crash or run programs if it processed a specially crafted image file.

Software Description

  • libgd2 - GD Graphics Library

Details

Stefan Esser discovered that the GD library incorrectly handled memory when processing certain images. If a user or automated system were tricked into processing a specially crafted image, an attacker could cause a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2016-10166)

It was discovered that the GD library incorrectly handled certain malformed images. If a user or automated system were tricked into processing a specially crafted image, an attacker could cause a denial of service. (CVE-2016-10167)

It was discovered that the GD library incorrectly handled certain malformed images. If a user or automated system were tricked into processing a specially crafted image, an attacker could cause a denial of service, or possibly execute arbitrary code. (CVE-2016-10168)

Ibrahim El-Sayed discovered that the GD library incorrectly handled certain malformed TGA images. If a user or automated system were tricked into processing a specially crafted TGA image, an attacker could cause a denial of service. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2016-6906)

Ibrahim El-Sayed discovered that the GD library incorrectly handled certain malformed WebP images. If a user or automated system were tricked into processing a specially crafted WebP image, an attacker could cause a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2016-6912)

It was discovered that the GD library incorrectly handled creating oversized images. If a user or automated system were tricked into creating a specially crafted image, an attacker could cause a denial of service. (CVE-2016-9317)

It was discovered that the GD library incorrectly handled filling certain images. If a user or automated system were tricked into filling an image, an attacker could cause a denial of service. (CVE-2016-9933)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 16.10
libgd3 - 2.2.1-1ubuntu3.3
Ubuntu 16.04 LTS
libgd3 - 2.1.1-4ubuntu0.16.04.6
Ubuntu 14.04 LTS
libgd3 - 2.1.0-3ubuntu0.6
Ubuntu 12.04 LTS
libgd2-noxpm - 2.0.36~rc1~dfsg-6ubuntu2.4
libgd2-xpm - 2.0.36~rc1~dfsg-6ubuntu2.4

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.

References