USN-3117-1: GD library vulnerabilities
Ubuntu Security Notice USN-3117-1
1st November, 2016
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
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 version:
- Ubuntu 16.10:
-
libgd3
2.2.1-1ubuntu3.2
- Ubuntu 16.04 LTS:
-
libgd3
2.1.1-4ubuntu0.16.04.5
- Ubuntu 14.04 LTS:
-
libgd3
2.1.0-3ubuntu0.5
- Ubuntu 12.04 LTS:
-
libgd2-xpm
2.0.36~rc1~dfsg-6ubuntu2.3
-
libgd2-noxpm
2.0.36~rc1~dfsg-6ubuntu2.3
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.
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