Severity

Medium

Vendor

Canonical Ubuntu

Versions Affected

• Canonical Ubuntu 14.04
• Canonical Ubuntu 16.04

Description

Daniel J. Bernstein, Joachim Breitner, Daniel Genkin, Leon Groot Bruinderink, Nadia Heninger, Tanja Lange, Christine van Vredendaal, and Yuval Yarom discovered that GnuPG is vulnerable to a cache side-channel attack. A local attacker could use this attack to recover RSA private keys.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

• Cloud Foundry BOSH trusty-stemcells are vulnerable, including:
  • 3363.x versions prior to 3363.71
  • 3421.x versions prior to 3421.79
  • 3445.x versions prior to 3445.64
  • 3468.x versions prior to 3468.63
  • 3541.x versions prior to 3541.44
  • 3586.x versions prior to 3586.36
  • All other stemcells not listed.
• Cloud Foundry BOSH xenial-stemcells are vulnerable, including:
  • 97.x versions prior to 97.5
  • All other stemcells not listed.
• All versions of Cloud Foundry cflinuxfs2 prior to 1.228.0

Mitigation

OSS users are strongly encouraged to follow one of the mitigations below:

• The Cloud Foundry project recommends upgrading the following BOSH trusty-stemcells:
  • Upgrade 3363.x versions to 3363.71
  • Upgrade 3421.x versions to 3421.79
  • Upgrade 3445.x versions to 3445.64
  • Upgrade 3468.x versions to 3468.63
  • Upgrade 3541.x versions to 3541.44
  • Upgrade 3586.x versions to 3586.36
  • All other stemcells should be upgraded to the latest version available on bosh.io.
• The Cloud Foundry project recommends upgrading the following BOSH xenial-stemcells:
  • Upgrade 97.x versions to 97.5
  • All other stemcells should be upgraded to the latest version available on bosh.io.
• The Cloud Foundry project recommends that Cloud Foundry deployments run with cflinuxfs2 version 1.228.0 or later.

References

• USN-3733-1
• CVE-2017-7526