Severity

Medium

Vendor

Canonical Ubuntu

Versions Affected

• Canonical Ubuntu 16.04
• Canonical Ubuntu 18.04

Description

Kevin Backhouse discovered that DBus incorrectly handled file descriptors. A local attacker could possibly use this issue to cause DBus to crash, resulting in a denial of service.

CVEs contained in this USN include: CVE-2020-12049.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

• cflinuxfs3
  • All versions prior to 0.195.0
• Xenial Stemcells
  • 170.x versions prior to 170.222
  • 250.x versions prior to 250.201
  • 315.x versions prior to 315.188
  • 456.x versions prior to 456.115
  • 621.x versions prior to 621.77
  • All other stemcells not listed.
• CF Deployment
  • All versions prior to v13.5.0

Mitigation

Users of affected products are strongly encouraged to follow the mitigations below. The Cloud Foundry project recommends upgrading the following releases:

• cflinuxfs3
  • Upgrade All versions to 0.195.0 or greater
• Xenial Stemcells
  • Upgrade 170.x versions to 170.222 or greater
  • Upgrade 250.x versions to 250.201 or greater
  • Upgrade 315.x versions to 315.188 or greater
  • Upgrade 456.x versions to 456.115 or greater
  • Upgrade 621.x versions to 621.77 or greater
  • All other stemcells should be upgraded to the latest version available on bosh.io.
• CF Deployment
  • Upgrade All versions to v13.5.0 or greater

References

• USN Notice
• CVE-2020-12049

History

2020-06-16: Initial vulnerability report published.