USN-5901-1: GnuTLS vulnerability

Severity

Medium

Vendor

Canonical Ubuntu

Description

Hubert Kario discovered that GnuTLS had a timing side-channel when handling certain RSA messages. A remote attacker could possibly use this issue to recover sensitive information. Update Instructions: Run `sudo pro fix USN-5901-1` to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: gnutls-doc – 3.6.13-2ubuntu1.8 libgnutls28-dev – 3.6.13-2ubuntu1.8 libgnutls-openssl27 – 3.6.13-2ubuntu1.8 libgnutls30 – 3.6.13-2ubuntu1.8 libgnutls-dane0 – 3.6.13-2ubuntu1.8 gnutls-bin – 3.6.13-2ubuntu1.8 guile-gnutls – 3.6.13-2ubuntu1.8 libgnutlsxx28 – 3.6.13-2ubuntu1.8 No subscription required

CVEs contained in this USN include: CVE-2023-0361.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

• cflinuxfs4
  • All versions prior to 0.67.0
• Jammy Stemcells
  • 1.x versions prior to 1.93
  • All other stemcells not listed.
• CF Deployment
  • All versions with Jammy Stemcells prior to 1.93

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 0.67.0 or greater
• Jammy Stemcells
  • Upgrade 1.x versions to 1.93 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 1.93 or greater

History

2023-03-23: Initial vulnerability report published.