USN-3030-1: GD library vulnerabilities

Ubuntu Security Notice USN-3030-1

11th 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 version:

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-xpm 2.0.36~rc1~dfsg-6ubuntu2.2

libgd2-noxpm 2.0.36~rc1~dfsg-6ubuntu2.2

To update your system, please follow these instructions: http://ift.tt/17VXqjU.

In general, a standard system update will make all the necessary changes.

References

CVE-2013-7456, CVE-2016-5116, CVE-2016-5766, CVE-2016-6128, CVE-2016-6161

from Ubuntu Security Notices http://ift.tt/29t1lcy