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Ubuntu Security Notice USN-3410-2
September 05, 2017

libgd2 vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.04 ESM

Summary:

GD library could be made to crash if it opened a specially crafted
file.

Software Description:
- libgd2: GD Graphics Library

Details:

USN-3410-1 fixed a vulnerability in GD Graphics Library.
This update provides the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

A It was discovered that the GD Graphics Library (aka libgd) incorrectly
A handled certain malformed PNG images. A remote attacker could use this
A issue to cause the GD Graphics Library to crash, resulting in a denial
A of service, or possibly execute arbitrary code.

Update instructions:

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

Ubuntu 12.04 ESM:
A  libgd-toolsA A A A A A A A A A A A A A A A A A A A A 2.0.36~rc1~dfsg-6ubuntu2.6
A  libgd2-noxpmA A A A A A A A A A A A A A A A A A A A 2.0.36~rc1~dfsg-6ubuntu2.6
A  libgd2-xpmA A A A A A A A A A A A A A A A A A A A A A 2.0.36~rc1~dfsg-6ubuntu2.6

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

References:
A  https://www.ubuntu.com/usn/usn-3410-2
A  https://www.ubuntu.com/usn/usn-3410-1
A  CVE-2017-6362