A GLib security update has been released for Ubuntu Linux 14.04 LTS, 16.04 LTS, and 18.04 LTS to address several security issues.

[USN-6165-2] GLib vulnerabilities

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Ubuntu Security Notice USN-6165-2
October 19, 2023

glib2.0 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 GLib.

Software Description:
- glib2.0: GLib library of C routines

Details:

USN-6165-1 fixed vulnerabilities in GLib. 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 GLib incorrectly handled non-normal GVariants. An
attacker could use this issue to cause GLib to crash, resulting in a
denial of service, or perform other unknown attacks.

Update instructions:

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

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
libglib2.0-0 2.56.4-0ubuntu0.18.04.9+esm3
libglib2.0-bin 2.56.4-0ubuntu0.18.04.9+esm3

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
libglib2.0-0 2.48.2-0ubuntu4.8+esm3
libglib2.0-bin 2.48.2-0ubuntu4.8+esm3

Ubuntu 14.04 LTS (Available with Ubuntu Pro):
libglib2.0-0 2.40.2-0ubuntu1.1+esm6
libglib2.0-bin 2.40.2-0ubuntu1.1+esm6

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

References:
https://ubuntu.com/security/notices/USN-6165-2
https://ubuntu.com/security/notices/USN-6165-1
CVE-2023-29499, CVE-2023-32611, CVE-2023-32636, CVE-2023-32643,
CVE-2023-32665