Severity

Medium

Vendor

Canonical Ubuntu

Versions Affected

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

Description

Erik C. Bjorge discovered that some Intel® Atom and Intel Xeon Scalable Processors did not properly implement access controls for out-of-band management. This may allow a privileged network-adjacent user to potentially escalate privileges. (CVE-2022-21216) Cfir Cohen, Erdem Aktas, Felix Wilhelm, James Forshaw, Josh Eads, Nagaraju Kodalapura Nagabhushana Rao, Przemyslaw Duda, Liron Shacham and Ron Anderson discovered that some Intel® Xeon® Processors used incorrect default permissions in some memory controller configurations when using Intel® Software Guard Extensions. This may allow a privileged local user to potentially escalate privileges. (CVE-2022-33196) It was discovered that some 3rd Generation Intel® Xeon® Scalable Processors did not properly calculate microkey keying. This may allow a privileged local user to potentially disclose information. (CVE-2022-33972) Joseph Nuzman discovered that some Intel® Processors when using Intel® Software Guard Extensions did not properly isolate shared resources. This may allow a privileged local user to potentially disclose information. (CVE-2022-38090) Update Instructions: Run sudo pro fix USN-5886-1 to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: intel-microcode – 3.20230214.0ubuntu0.16.04.1+esm1 Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

CVEs contained in this USN include: CVE-2022-21216, CVE-2022-33196, CVE-2022-33972, CVE-2022-38090.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

• Bionic Stemcells
  • 1.x versions prior to 1.181
  • All other stemcells not listed.
• Jammy Stemcells
  • v1.x versions prior to 1.93
  • All other stemcells not listed.
• CF Deployment
  • All versions with Jammy Stemcells prior to 1.93, Bionic Stemcells prior to 1.181, or Xenial Stemcells prior to 621.448

Mitigation

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

The Cloud Foundry project recommends upgrading the following releases:

• Bionic Stemcells
  • Upgrade 1.x versions to 1.181 or greater
  • All other stemcells should be upgraded to the latest version available on bosh.io.
• Jammy Stemcells
  • Upgrade v1.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, upgrade Bionic Stemcells to 1.181 or greater, and upgrade Xenial Stemcells to 621.448 or greater

References

• USN Notice
• CVE-2022-21216
• CVE-2022-33196
• CVE-2022-33972
• CVE-2022-38090

History

2023-04-20: Initial vulnerability report published.