Ubuntu alert USN-6593-1 (gnutls28)

From:
             
 
Marc Deslauriers <marc.deslauriers@canonical.com>
To:
             
 
"ubuntu-security-announce@lists.ubuntu.com" <ubuntu-security-announce@lists.ubuntu.com>
Subject:
             
 
[USN-6593-1] GnuTLS vulnerabilities
Date:
             
 
Mon, 22 Jan 2024 10:06:30 -0500
Message-ID:
             
 
<19318fd3-ba0b-4897-8d92-7b0a3ec72edd@canonical.com>
==========================================================================
Ubuntu Security Notice USN-6593-1
January 22, 2024

gnutls28 vulnerabilities
==========================================================================

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

- Ubuntu 23.10
- Ubuntu 23.04
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS

Summary:

Several security issues were fixed in GnuTLS.

Software Description:
- gnutls28: GNU TLS library

Details:

It was discovered that GnuTLS had a timing side-channel when processing
malformed ciphertexts in RSA-PSK ClientKeyExchange. A remote attacker could
possibly use this issue to recover sensitive information. (CVE-2024-0553)

It was discovered that GnuTLS incorrectly handled certain certificate
chains with a cross-signing loop. A remote attacker could possibly use this
issue to cause GnuTLS to crash, resulting in a denial of service. This
issue only affected Ubuntu 22.04 LTS, Ubuntu 23.04, and Ubuntu 23.10.
(CVE-2024-0567)

Update instructions:

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

Ubuntu 23.10:
   libgnutls30                     3.8.1-4ubuntu1.2

Ubuntu 23.04:
   libgnutls30                     3.7.8-5ubuntu1.2

Ubuntu 22.04 LTS:
   libgnutls30                     3.7.3-4ubuntu1.4

Ubuntu 20.04 LTS:
   libgnutls30                     3.6.13-2ubuntu1.10

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

References:
   https://ubuntu.com/security/notices/USN-6593-1
   CVE-2024-0553, CVE-2024-0567

Package Information:
   https://launchpad.net/ubuntu/+source/gnutls28/3.8.1-4ubun...
   https://launchpad.net/ubuntu/+source/gnutls28/3.7.8-5ubun...
   https://launchpad.net/ubuntu/+source/gnutls28/3.7.3-4ubun...
   https://launchpad.net/ubuntu/+source/gnutls28/3.6.13-2ubu...