==========================================================================
Ubuntu Security Notice USN-4316-1
April 02, 2020

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

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

- Ubuntu 19.10
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in GD Graphics Library.

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

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. This issue
only affected Ubuntu 18.04 LTS and Ubuntu 16.04 LTS. (CVE-2019-11038)

Update instructions:

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

Ubuntu 19.10:
  libgd-tools                     2.2.5-5.2ubuntu0.19.10.1
  libgd3                          2.2.5-5.2ubuntu0.19.10.1

Ubuntu 18.04 LTS:
  libgd-tools                     2.2.5-4ubuntu0.4
  libgd3                          2.2.5-4ubuntu0.4

Ubuntu 16.04 LTS:
  libgd-tools                     2.1.1-4ubuntu0.16.04.12
  libgd3                          2.1.1-4ubuntu0.16.04.12

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

References:

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

Package Information:
  https://launchpad.net/ubuntu/+source/libgd2/2.2.5-5.2ubuntu0.19.10.1
<https://launchpad.net/ubuntu/+source/libgd2/2.2.5-5.2ubuntu0.19.10.1>
  https://launchpad.net/ubuntu/+source/libgd2/2.2.5-4ubuntu0.4
<https://launchpad.net/ubuntu/+source/libgd2/2.2.5-4ubuntu0.4>
  https://launchpad.net/ubuntu/+source/libgd2/2.1.1-4ubuntu0.16.04.12
<https://launchpad.net/ubuntu/+source/libgd2/2.1.1-4ubuntu0.16.04.12>