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Security Advisory

USN-4236-2: Libgcrypt vulnerability

USN-4236-2: Libgcrypt vulnerability




Canonical Ubuntu

Versions Affected

  • Canonical Ubuntu 16.04


USN-4236-1 fixed a vulnerability in Libgcrypt. This update provides the corresponding fix for Ubuntu 16.04 LTS.

Original advisory details:

It was discovered that Libgcrypt was susceptible to a ECDSA timing attack. An attacker could possibly use this attack to recover sensitive information.

CVEs contained in this USN include: CVE-2019-13627.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

  • Xenial Stemcells
    • 621.x versions prior to 621.50
    • 456.x versions prior to 456.93
    • 315.x versions prior to 315.163
    • 250.x versions prior to 250.178
    • 170.x versions prior to 170.198
    • 97.x versions prior to 97.226
    • 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 621.x versions to 621.50 or greater
    • Upgrade 456.x versions to 456.93 or greater
    • Upgrade 315.x versions to 315.163 or greater
    • Upgrade 250.x versions to 250.178 or greater
    • Upgrade 170.x versions to 170.198 or greater
    • Upgrade 97.x versions to 97.226 or greater
    • All other stemcells should be upgraded to the latest version available on


2020-01-14: Initial vulnerability report published.

Cloud Foundry Foundation Security Team Profile Image

Cloud Foundry Foundation Security Team, AUTHOR