USN-3117-1: GD library vulnerabilities

Releases

• Ubuntu 16.10
• Ubuntu 16.04 ESM
• Ubuntu 14.04 ESM
• Ubuntu 12.04

Packages

• libgd2 - GD Graphics Library

Details

Ibrahim El-Sayed discovered that the GD library incorrectly handled certain
malformed Tiff images. If a user or automated system were tricked into
processing a specially crafted Tiff image, an attacker could cause a denial
of service. (CVE-2016-6911)

Ke Liu discovered that the GD library incorrectly handled certain integers
when processing 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
applied to Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 16.10.
(CVE-2016-7568)

Emmanuel Law discovered that the GD library incorrectly handled certain
strings when creating 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-2016-8670)

Update instructions

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

Ubuntu 16.10

• libgd3 - 2.2.1-1ubuntu3.2

Ubuntu 16.04

• libgd3 - 2.1.1-4ubuntu0.16.04.5

Ubuntu 14.04

• libgd3 - 2.1.0-3ubuntu0.5

Ubuntu 12.04

• libgd2-noxpm - 2.0.36~rc1~dfsg-6ubuntu2.3
• libgd2-xpm - 2.0.36~rc1~dfsg-6ubuntu2.3

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

References

• CVE-2016-6911
• CVE-2016-7568
• CVE-2016-8670