USN-6733-1: GnuTLS vulnerabilities

Releases

• Ubuntu 23.10
• Ubuntu 22.04 LTS
• Ubuntu 20.04 LTS

Packages

• gnutls28 - GNU TLS library

Details

It was discovered that GnuTLS had a timing side-channel when performing
certain ECDSA operations. A remote attacker could possibly use this issue
to recover sensitive information. (CVE-2024-28834)

It was discovered that GnuTLS incorrectly handled verifying certain PEM
bundles. 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 and Ubuntu 23.10. (CVE-2024-28835)

Update instructions

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

Ubuntu 23.10

• libgnutls30 - 3.8.1-4ubuntu1.3

Ubuntu 22.04

• libgnutls30 - 3.7.3-4ubuntu1.5

Ubuntu 20.04

• libgnutls30 - 3.6.13-2ubuntu1.11

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

References

• CVE-2024-28835
• CVE-2024-28834

Related notices

• USN-6733-2: libgnutls28-dev, libgnutls30t64, libgnutls-dane0t64, gnutls28, gnutls-bin, gnutls-doc, libgnutls-openssl27t64