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Ubuntu Security Notice USN-6658-2
March 11, 2024

libxml2 vulnerability
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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:

libxml2 could be made to crash or run programs if it opened a specially
crafted file.

Software Description:
- libxml2: GNOME XML library

Details:

USN-6658-1 fixed a vulnerability in libxml2. This update
provides the corresponding updates for Ubuntu 14.04 LTS,
Ubuntu 16.04 LTS, and Ubuntu 18.04 LTS.

Original advisory details:

  It was discovered that libxml2 incorrectly handled certain XML 
documents. A
  remote attacker could possibly use this issue to cause libxml2 to crash,
  resulting in a denial of service, or possibly execute arbitrary code.

Update instructions:

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

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
   libxml2                         2.9.4+dfsg1-6.1ubuntu1.9+esm1

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
   libxml2                         2.9.3+dfsg1-1ubuntu0.7+esm6

Ubuntu 14.04 LTS (Available with Ubuntu Pro):
   libxml2                         2.9.1+dfsg1-3ubuntu4.13+esm6

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

References:
   https://ubuntu.com/security/notices/USN-6658-2
   https://ubuntu.com/security/notices/USN-6658-1
   CVE-2024-25062