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:
https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.