Severity

Medium

Vendor

Canonical Ubuntu

Versions Affected

• Canonical Ubuntu 14.04

Description

Jayachandran Palanisamy discovered that the Bind resolver incorrectly handled fetch cleanup sequencing. A remote attacker could possibly use this issue to cause Bind to crash, resulting in a denial of service.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

• Cloud Foundry BOSH stemcells are vulnerable, including:
  • 3312.x versions prior to 3312.51
  • 3363.x versions prior to 3363.48
  • 3421.x versions prior to 3421.38
  • 3445.x versions prior to 3445.24
  • 3468.x versions prior to 3468.19
  • All other stemcells not listed.
• All versions of Cloud Foundry cflinuxfs2 prior to 1.181.0

Mitigation

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

• The Cloud Foundry project recommends upgrading the following BOSH stemcells:
  • Upgrade 3312.x versions to 3312.51
  • Upgrade 3363.x versions to 3363.48
  • Upgrade 3421.x versions to 3421.38
  • Upgrade 3445.x versions to 3445.24
  • Upgrade 3468.x versions to 3468.19
  • 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 1.181.0 or later.

References

• USN-3535-1
• CVE-2017-3145