USN-6733-1: GnuTLS vulnerabilities

Severity

Medium

Vendor

Canonical Ubuntu

Description

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: Run `sudo pro fix USN-6733-1` to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: gnutls-bin – 3.6.13-2ubuntu1.11 gnutls-doc – 3.6.13-2ubuntu1.11 guile-gnutls – 3.6.13-2ubuntu1.11 libgnutls-dane0 – 3.6.13-2ubuntu1.11 libgnutls-openssl27 – 3.6.13-2ubuntu1.11 libgnutls28-dev – 3.6.13-2ubuntu1.11 libgnutls30 – 3.6.13-2ubuntu1.11 libgnutlsxx28 – 3.6.13-2ubuntu1.11 No subscription required

CVEs contained in this USN include: CVE-2024-28834, CVE-2024-28835.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

• cflinuxfs4
  • All versions prior to 1.90.0
• Jammy Stemcells
  • 1.x versions prior to 1.439
  • All other stemcells not listed.
• CF Deployment
  • All versions with Jammy Stemcells prior to 1.439

Mitigation

Users of affected products are strongly encouraged to follow the mitigations below.

The Cloud Foundry project recommends upgrading the following releases:

• cflinuxfs4
  • Upgrade all versions to 1.90.0 or greater
• Jammy Stemcells
  • Upgrade 1.x versions to 1.439 or greater
  • All other stemcells should be upgraded to the latest version available on bosh.io.
• CF Deployment
  • For all versions, upgrade Jammy Stemcells to 1.439 or greater

History

2024-05-23: Initial vulnerability report published.