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Security Advisory

USN-4593-1: FreeType vulnerability




Canonical Ubuntu

Versions Affected

  • Canonical Ubuntu 16.04
  • Canonical Ubuntu 18.04


Sergei Glazunov discovered that FreeType did not correctly handle certain malformed font files. If a user were tricked into using a specially crafted font file, a remote attacker could cause FreeType to crash or possibly execute arbitrary code with user privileges.

CVEs contained in this USN include: CVE-2020-15999.

Affected Cloud Foundry Products and Versions

Severity is high unless otherwise noted.

  • cflinuxfs3
    • All versions prior to 0.210.0
  • Xenial Stemcells
    • 315.x versions prior to 315.199
    • 456.x versions prior to 456.126
    • 621.x versions prior to 621.90
    • All other stemcells not listed.
  • CF Deployment
    • All versions prior to 14.0.0


Users of affected products are strongly encouraged to follow the mitigations below. The Cloud Foundry project recommends upgrading the following releases:

  • cflinuxfs3
    • Upgrade All versions to 0.210.0 or greater
  • Xenial Stemcells
    • Upgrade 315.x versions to 315.199 or greater
    • Upgrade 456.x versions to 456.126 or greater
    • Upgrade 621.x versions to 621.90 or greater
    • All other stemcells should be upgraded to the latest version available on
  • CF Deployment
    • Upgrade All versions to 14.0.0 or greater


2020-11-20: Initial vulnerability report published.

Cloud Foundry Foundation Security Team Profile Image

Cloud Foundry Foundation Security Team, AUTHOR