USN-3030-1: GD library vulnerabilities

Releases

• Ubuntu 16.04 ESM
• Ubuntu 15.10
• Ubuntu 14.04 ESM
• Ubuntu 12.04

Packages

• 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

• libgd3 - 2.1.1-4ubuntu0.16.04.2

Ubuntu 15.10

• libgd3 - 2.1.1-4ubuntu0.15.10.2

Ubuntu 14.04

• libgd3 - 2.1.0-3ubuntu0.2

Ubuntu 12.04

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

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