USN-3030-1: GD library vulnerabilities

11 July 2016

libgd2 vulnerabilities

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

  • Ubuntu 16.04 LTS
  • Ubuntu 15.10
  • 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

It was discovered that the GD library incorrectly handled memory when using gdImageScaleTwoPass(). A remote attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 14.04 LTS. (CVE-2013-7456)

It was discovered that the GD library incorrectly handled certain malformed XBM images. If a user or automated system were tricked into processing a specially crafted XBM image, an attacker could cause a denial of service. This issue only affected Ubuntu 14.04 LTS, Ubuntu 15.10 and Ubuntu 16.04 LTS. (CVE-2016-5116)

It was discovered that the GD library incorrectly handled memory when using _gd2GetHeader(). A remote attacker could possibly use this issue to cause a denial of service or possibly execute arbitrary code. (CVE-2016-5766)

It was discovered that the GD library incorrectly handled certain color indexes. A remote attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 14.04 LTS, Ubuntu 15.10 and Ubuntu 16.04 LTS. (CVE-2016-6128)

It was discovered that the GD library incorrectly handled memory when encoding a GIF image. A remote attacker could possibly use this issue to cause a denial of service. (CVE-2016-6161)

Update instructions

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

Ubuntu 16.04 LTS
libgd3 - 2.1.1-4ubuntu0.16.04.2
Ubuntu 15.10
libgd3 - 2.1.1-4ubuntu0.15.10.2
Ubuntu 14.04 LTS
libgd3 - 2.1.0-3ubuntu0.2
Ubuntu 12.04 LTS
libgd2-noxpm - 2.0.36~rc1~dfsg-6ubuntu2.2
libgd2-xpm - 2.0.36~rc1~dfsg-6ubuntu2.2

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