USN-4969-1: DHCP vulnerability | Cloud Foundry

Severity

Medium

Vendor

Canonical Ubuntu

Versions Affected

• Canonical Ubuntu 18.04

Description

Jon Franklin and Pawel Wieczorkiewicz discovered that DHCP incorrectly handled lease file parsing. A remote attacker could possibly use this issue to cause DHCP to crash, resulting in a denial of service.

CVEs contained in this USN include: CVE-2021-25217.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

• Bionic Stemcells
  • 1.x versions prior to 1.10
  • All other stemcells not listed.
• cflinuxfs3
  • All versions prior to 0.241.0
• CF Deployment
  • All versions prior to 16.15.0

Mitigation

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

• Bionic Stemcells
  • Upgrade 1.x versions to 1.10 or greater
  • All other stemcells should be upgraded to the latest version available on bosh.io.
• cflinuxfs3
  • Upgrade all versions to 0.241.0 or greater
• CF Deployment
  • Upgrade all versions to 16.15.0 or greater

References

• USN Notice
• CVE-2021-25217

History

2021-06-11: Initial vulnerability report published.