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Security Advisory

USN-5548-1: libxml2 vulnerability

USN-5548-1: libxml2 vulnerability




Canonical Ubuntu

Versions Affected

  • Canonical Ubuntu 16.04
  • Canonical Ubuntu 18.04


It was discovered that libxml2 incorrectly handled certain XML files. An attacker could possibly use this issue to execute arbitrary code. Update Instructions: Run `sudo ua fix USN-5548-1` to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: libxml2 – 2.9.3+dfsg1-1ubuntu0.7+esm3 libxml2-dev – 2.9.3+dfsg1-1ubuntu0.7+esm3 python-libxml2 – 2.9.3+dfsg1-1ubuntu0.7+esm3 libxml2-doc – 2.9.3+dfsg1-1ubuntu0.7+esm3 libxml2-utils – 2.9.3+dfsg1-1ubuntu0.7+esm3 Available with UA Infra or UA Desktop:

CVEs contained in this USN include: CVE-2016-3709.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

  • Bionic Stemcells
    • 1.x versions prior to 1.97
    • All other stemcells not listed.
  • cflinuxfs3
    • All versions prior to 0.314.0
  • CF Deployment
    • All versions


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

The Cloud Foundry project recommends upgrading the following releases:

  • Bionic Stemcells
    • Upgrade 1.x versions to 1.97 or greater
    • All other stemcells should be upgraded to the latest version available on
  • cflinuxfs3
    • Upgrade all versions to 0.314.0 or greater
  • CF Deployment
    • There are no fixed versions of this product


2022-08-25: Initial vulnerability report published.

Cloud Foundry Foundation Security Team Profile Image

Cloud Foundry Foundation Security Team, AUTHOR