Severity

Medium

Vendor

Canonical Ubuntu

Versions Affected

• Canonical Ubuntu 14.04

Description

Wei Lei discovered that libxml2 incorrecty handled certain parameter entities. An attacker could use this issue with specially constructed XML data to cause libxml2 to consume resources, leading to a denial of service.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

• Cloud Foundry BOSH stemcells are vulnerable, including:
  • 3421.x versions prior to 3421.34
  • 3445.x versions prior to 3445.19
  • 3468.x versions prior to 3468.13
  • All other stemcells not listed.
• All versions of Cloud Foundry cflinuxfs2 prior to 1.173.0

Mitigation

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

• The Cloud Foundry project recommends upgrading the following BOSH stemcells:
  • Upgrade 3421.x versions prior to 3421.34
  • Upgrade 3445.x versions prior to 3445.19
  • Upgrade 3468.x versions prior to 3468.13
  • 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 1.173.0 or later.

References

• USN-3504-1
• CVE-2017-16932