==========================================================================
Ubuntu Security Notice USN-3030-1
July 11, 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 versions:

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-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:
http://www.ubuntu.com/usn/usn-3030-1
CVE-2013-7456, CVE-2016-5116, CVE-2016-5766, CVE-2016-6128,
CVE-2016-6161

Package Information:
https://launchpad.net/ubuntu/+source/libgd2/2.1.1-4ubuntu0.16.04.2
https://launchpad.net/ubuntu/+source/libgd2/2.1.1-4ubuntu0.15.10.2
https://launchpad.net/ubuntu/+source/libgd2/2.1.0-3ubuntu0.2
https://launchpad.net/ubuntu/+source/libgd2/2.0.36~rc1~dfsg-6ubuntu2.2

—–BEGIN PGP SIGNATURE—–
Version: GnuPG v2
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=V3qa
—–END PGP SIGNATURE—–
—