Severity

Medium

Vendor

Canonical Ubuntu

Versions Affected

• Canonical Ubuntu 16.04
• Canonical Ubuntu 18.04

Description

Joe Vennix discovered that DBus incorrectly handled DBUS_COOKIE_SHA1 authentication. A local attacker could possibly use this issue to bypass authentication and connect to DBus servers with elevated privileges.

CVEs contained in this USN include: CVE-2019-12749

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

• Cloud Foundry BOSH xenial-stemcells are vulnerable, including:
  • 315.x versions prior to 315.41
  • 250.x versions prior to 250.63
  • 170.x versions prior to 170.82
  • 97.x versions prior to 97.113
  • All other stemcells not listed.
• All versions of Cloud Foundry cflinuxfs3 prior to 0.101.0

Mitigation

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

• The Cloud Foundry project recommends upgrading the following BOSH xenial-stemcells:
  • Upgrade 315.x versions to 315.41
  • Upgrade 250.x versions to 250.63
  • Upgrade 170.x versions to 170.82
  • Upgrade 97.x versions to 97.113
  • 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 cflinuxfs3 version 0.101.0 or later.

References

• USN-4015-1
• CVE-2019-12749