[USN-7281-1] GnuTLS vulnerability

[Marc Deslauriers]

==========================================================================
Ubuntu Security Notice USN-7281-1
February 20, 2025

gnutls28 vulnerability
==========================================================================

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

- Ubuntu 24.10
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS

Summary:

GnuTLS could be made to consume resources if it decoded specially crafted
certificates.

Software Description:
- gnutls28: GNU TLS library

Details:

Bing Shi discovered that GnuTLS incorrectly handled decoding certain
DER-encoded certificates. A remote attacker could possibly use this issue
to cause GnuTLS to consume resources, leading to a denial of service.

Update instructions:

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

Ubuntu 24.10
   libgnutls30t64                  3.8.6-2ubuntu1.1

Ubuntu 24.04 LTS
   libgnutls30t64                  3.8.3-1.1ubuntu3.3

Ubuntu 22.04 LTS
   libgnutls30                     3.7.3-4ubuntu1.6

Ubuntu 20.04 LTS
   libgnutls30                     3.6.13-2ubuntu1.12

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

References:
   https://ubuntu.com/security/notices/USN-7281-1
   CVE-2024-12243

Package Information:
   https://launchpad.net/ubuntu/+source/gnutls28/3.8.6-2ubuntu1.1
   https://launchpad.net/ubuntu/+source/gnutls28/3.8.3-1.1ubuntu3.3
   https://launchpad.net/ubuntu/+source/gnutls28/3.7.3-4ubuntu1.6
   https://launchpad.net/ubuntu/+source/gnutls28/3.6.13-2ubuntu1.12

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