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Ubuntu Security Notice USN-6408-2
October 23, 2023

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

- Ubuntu 18.04 LTS (Available with Ubuntu Pro)
- Ubuntu 16.04 LTS (Available with Ubuntu Pro)
- Ubuntu 14.04 LTS (Available with Ubuntu Pro)

Summary:

Several security issues were fixed in libXpm.

Software Description:
- libxpm: X11 pixmap library

Details:

USN-6408-1 fixed several vulnerabilities in libXpm. This update provides
the corresponding update for Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 18.04 LTS.

Original advisory details:

 Yair Mizrahi discovered that libXpm incorrectly handled certain malformed
 XPM image files. If a user were tricked into opening a specially crafted
 XPM image file, a remote attacker could possibly use this issue to consume
 memory, leading to a denial of service. (CVE-2023-43786)

 Yair Mizrahi discovered that libXpm incorrectly handled certain malformed
 XPM image files. If a user were tricked into opening a specially crafted
 XPM image file, a remote attacker could use this issue to cause libXpm to
 crash, leading to a denial of service, or possibly execute arbitrary code.
 (CVE-2023-43787)

 Alan Coopersmith discovered that libXpm incorrectly handled certain
 malformed XPM image files. If a user were tricked into opening a specially
 crafted XPM image file, a remote attacker could possibly use this issue to
 cause libXpm to crash, leading to a denial of service. (CVE-2023-43788,
 CVE-2023-43789)

Update instructions:

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

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
  libxpm4                         1:3.5.12-1ubuntu0.18.04.2+esm1

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
  libxpm4                         1:3.5.11-1ubuntu0.16.04.1+esm2

Ubuntu 14.04 LTS (Available with Ubuntu Pro):
  libxpm4                         1:3.5.10-1ubuntu0.1+esm2

After a standard system update you need to reboot your computer to make all
the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-6408-2
  https://ubuntu.com/security/notices/USN-6408-1
  CVE-2023-43786, CVE-2023-43787, CVE-2023-43788, CVE-2023-43789