Severity

High

Vendor

Canonical Ubuntu

Versions Affected

• Canonical Ubuntu 16.04

Description

Or Cohen discovered that the AF_PACKET implementation in the Linux kernel did not properly perform bounds checking in some situations. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.

CVEs contained in this USN include: CVE-2020-14386.

Affected Cloud Foundry Products and Versions

Severity is high unless otherwise noted.

• Xenial Stemcells
  • 250.x versions prior to 250.206
  • 315.x versions prior to 315.193
  • 456.x versions prior to 456.120
  • 621.x versions prior to 621.84
  • All other stemcells not listed.

Mitigation

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 250.206 or greater
  • Upgrade 315.x versions to 315.193 or greater
  • Upgrade 456.x versions to 456.120 or greater
  • Upgrade 621.x versions to 621.84 or greater
  • All other stemcells should be upgraded to the latest version available on bosh.io.

References

• USN Notice
• CVE-2020-14386

History

2020-09-24: Initial vulnerability report published.