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Security Advisory

USN-4221-1: libpcap vulnerability

USN-4221-1: libpcap vulnerability




Canonical Ubuntu

Versions Affected

  • Canonical Ubuntu 16.04
  • Canonical Ubuntu 18.04


It was discovered that libpcap did not properly validate PHB headers in some situations. An attacker could use this to cause a denial of service (memory exhaustion).

CVEs contained in this USN include: CVE-2019-15165

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

  • Cloud Foundry BOSH xenial-stemcells are vulnerable, including:
    • 621.x versions prior to 621.41
    • 456.x versions prior to 456.84
    • 315.x versions prior to 315.154
    • 250.x versions prior to 250.170
    • 170.x versions prior to 170.189
    • 97.x versions prior to 97.217
    • All other stemcells not listed.
  • All versions of Cloud Foundry cflinuxfs3 prior to 0.151.0


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 621.x versions to 621.41
    • Upgrade 456.x versions to 456.84
    • Upgrade 315.x versions to 315.154
    • Upgrade 250.x versions to 250.170
    • Upgrade 170.x versions to 170.189
    • Upgrade 97.x versions to 97.217
    • 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 0.151.0 or later.


Cloud Foundry Foundation Security Team Profile Image

Cloud Foundry Foundation Security Team, AUTHOR