[USN-4316-2] GD Graphics Library vulnerabilities

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==========================================================================
Ubuntu Security Notice USN-4316-2
April 02, 2020

libgd2 vulnerabilities
==========================================================================

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

- Ubuntu 14.04 ESM

Summary:

Several security issues were fixed in GD Graphics Library.

Software Description:
- libgd2: Open source code library for the dynamic creation of images

Details:

USN-4316-1 fixed a vulnerability in GD Graphics Library. This update provides
the corresponding update for Ubuntu 14.04 ESM.

Original advisory details:

It was discovered that GD Graphics Library incorrectly handled cloning an
image. An attacker could possibly use this issue to cause GD Graphics Library
to crash, resulting in a denial of service. (CVE-2018-14553)

It was discovered that GD Graphics Library incorrectly handled loading images
from X bitmap format files. An attacker could possibly use this issue to cause
GD Graphics Library to crash, resulting in a denial of service, or to disclose
contents of the stack that has been left there by previous code. (CVE-2019-11038)

Update instructions:

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

Ubuntu 14.04 ESM:
  libgd-tools                     2.1.0-3ubuntu0.11+esm1
  libgd3                          2.1.0-3ubuntu0.11+esm1

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

References:
  https://usn.ubuntu.com/4316-2
  https://usn.ubuntu.com/4316-1
  CVE-2018-14553, CVE-2019-11038