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Security Advisory

USN-4132-1: Expat vulnerability

USN-4132-1: Expat vulnerability




Canonical Ubuntu

Versions Affected

  • Canonical Ubuntu 16.04
  • Canonical Ubuntu 18.04


It was discovered that Expat incorrectly handled certain XML files. An attacker could possibly use this issue to expose sensitive information.

CVEs contained in this USN include: CVE-2019-15903

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

  • Cloud Foundry BOSH xenial-stemcells are vulnerable, including:
    • 456.x versions prior to 456.25
    • 315.x versions prior to 315.97
    • 250.x versions prior to 250.110
    • 170.x versions prior to 170.133
    • 97.x versions prior to 97.159
    • All other stemcells not listed.
  • All versions of Cloud Foundry cflinuxfs3 prior to 0.127.0


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 456.x versions to 456.25
    • Upgrade 315.x versions to 315.97
    • Upgrade 250.x versions to 250.110
    • Upgrade 170.x versions to 170.133
    • Upgrade 97.x versions to 97.159
    • All other stemcells should be upgraded to the latest version available on
  • The Cloud Foundry project recommends that Cloud Foundry deployments run with cflinuxfs3 version 0.127.0 or later.


Cloud Foundry Foundation Security Team Profile Image

Cloud Foundry Foundation Security Team, AUTHOR