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Security Advisory

USN-4457-1: Software Properties vulnerability

USN-4457-1: Software Properties vulnerability




Canonical Ubuntu

Versions Affected

  • Canonical Ubuntu 16.04


Jason A. Donenfeld discovered that Software Properties incorrectly filtered certain escape sequences when displaying PPA descriptions. If a user were tricked into adding an arbitrary PPA, a remote attacker could possibly manipulate the screen.

CVEs contained in this USN include: CVE-2020-15709.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

  • Xenial Stemcells
    • 250.x versions prior to 250.204
    • 315.x versions prior to 315.191
    • 456.x versions prior to 456.118
    • 621.x versions prior to 621.81
    • All other stemcells not listed.


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

  • Xenial Stemcells
    • Upgrade 250.x versions to 250.204 or greater
    • Upgrade 315.x versions to 315.191 or greater
    • Upgrade 456.x versions to 456.118 or greater
    • Upgrade 621.x versions to 621.81 or greater
    • All other stemcells should be upgraded to the latest version available on


2020-09-24: Initial vulnerability report published.

Cloud Foundry Foundation Security Team Profile Image

Cloud Foundry Foundation Security Team, AUTHOR