Severity

Medium

Vendor

Canonical Ubuntu

Versions Affected

• Canonical Ubuntu 22.04

Description

It was discovered that GnuTLS had a timing side-channel when handling certain RSA-PSK key exchanges. A remote attacker could possibly use this issue to recover sensitive information. Update Instructions: Run sudo pro fix USN-6499-1 to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: libgnutls30 – 3.6.13-2ubuntu1.9 libgnutls28-dev – 3.6.13-2ubuntu1.9 libgnutlsxx28 – 3.6.13-2ubuntu1.9 gnutls-doc – 3.6.13-2ubuntu1.9 libgnutls-dane0 – 3.6.13-2ubuntu1.9 gnutls-bin – 3.6.13-2ubuntu1.9 guile-gnutls – 3.6.13-2ubuntu1.9 libgnutls-openssl27 – 3.6.13-2ubuntu1.9 No subscription required

CVEs contained in this USN include: CVE-2023-5981.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

• cflinuxfs4
  • All versions prior to 1.52.0
• Jammy Stemcells
  • 1.x versions prior to 1.309
  • All other stemcells not listed.
• CF Deployment
  • All versions with Jammy Stemcells prior to 1.309

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 1.52.0 or greater
• Jammy Stemcells
  • Upgrade 1.x versions to 1.309 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 1.309 or greater

References

• USN Notice
• CVE-2023-5981

History

2024-03-18: Initial vulnerability report published.