Severity

Medium

Vendor

Canonical Ubuntu

Versions Affected

• Canonical Ubuntu 16.04
• Canonical Ubuntu 18.04
• Canonical Ubuntu 22.04

Description

Daniël Trujillo, Johannes Wikner, and Kaveh Razavi discovered that some AMD processors utilising speculative execution and branch prediction may allow unauthorised memory reads via a speculative side-channel attack. A local attacker could use this to expose sensitive information, including kernel memory. Update Instructions: Run sudo pro fix USN-6319-1 to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: amd64-microcode – 3.20191021.1+really3.20180524.1~ubuntu0.16.04.2+esm2 Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

CVEs contained in this USN include: CVE-2023-20569.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

• Jammy Stemcells
  • 1.x versions prior to 1.222
  • All other stemcells not listed.
• CF Deployment
  • All versions with Jammy Stemcells prior to 1.222

Mitigation

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

The Cloud Foundry project recommends upgrading the following releases:

• Jammy Stemcells
  • Upgrade 1.x versions to 1.222 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 1.222 or greater

References

• USN Notice
• CVE-2023-20569

History

2023-10-05: Initial vulnerability report published.