A libXpm security update has been released for Ubuntu Linux 16.04 ESM.

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Ubuntu Security Notice USN-5807-2
February 21, 2023

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

- Ubuntu 16.04 ESM

Summary:

Several security issues were fixed in libXpm.

Software Description:
- libxpm: X11 pixmap library

Details:

USN-5807-1 fixed vulnerabilities in libXpm. This update provides the
corresponding updates for Ubuntu 16.04 ESM.

Original advisory details:

Martin Ettl discovered that libXpm incorrectly handled certain XPM files.
If a user or automated system were tricked into opening a specially crafted
XPM file, a remote attacker could possibly use this issue to cause libXpm
to stop responding, resulting in a denial of service. (CVE-2022-44617)

Marco Ivaldi discovered that libXpm incorrectly handled certain XPM files.
If a user or automated system were tricked into opening a specially crafted
XPM file, a remote attacker could possibly use this issue to cause libXpm
to stop responding, resulting in a denial of service. (CVE-2022-46285)

Alan Coopersmith discovered that libXpm incorrectly handled calling
external helper binaries. If libXpm was being used by a setuid binary, a
local attacker could possibly use this issue to escalate privileges.
(CVE-2022-4883)

Update instructions:

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

Ubuntu 16.04 ESM:
libxpm4 1:3.5.11-1ubuntu0.16.04.1+esm1
xpmutils 1:3.5.11-1ubuntu0.16.04.1+esm1

After a standard system update you need to restart your session to make all
the necessary changes.

References:
https://ubuntu.com/security/notices/USN-5807-2
https://ubuntu.com/security/notices/USN-5807-1
CVE-2022-44617, CVE-2022-46285, CVE-2022-4883