USN-6593-1: GnuTLS vulnerabilities | Cloud Foundry

Severity

Medium

Vendor

Canonical Ubuntu

Versions Affected

• Canonical Ubuntu 22.04

Description

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: Run sudo pro fix USN-6593-1 to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: libgnutls30 – 3.6.13-2ubuntu1.10 libgnutls28-dev – 3.6.13-2ubuntu1.10 libgnutlsxx28 – 3.6.13-2ubuntu1.10 gnutls-doc – 3.6.13-2ubuntu1.10 libgnutls-dane0 – 3.6.13-2ubuntu1.10 gnutls-bin – 3.6.13-2ubuntu1.10 guile-gnutls – 3.6.13-2ubuntu1.10 libgnutls-openssl27 – 3.6.13-2ubuntu1.10 No subscription required

CVEs contained in this USN include: CVE-2024-0553, CVE-2024-0567.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

• cflinuxfs4
  • All versions prior to 1.67.0
• Jammy Stemcells
  • 1.x versions prior to 1.351
  • All other stemcells not listed.
• CF Deployment
  • All versions with Jammy Stemcells prior to 1.351

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 1.67.0 or greater
• Jammy Stemcells
  • Upgrade 1.x versions to 1.351 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 1.351 or greater

References

• USN Notice
• CVE-2024-0553
• CVE-2024-0567

History

2024-02-29: Initial vulnerability report published.