Cloud Foundry Logo
blog single gear
Security Advisory

USN-5569-1: Unbound vulnerabilities

USN-5569-1: Unbound vulnerabilities




Canonical Ubuntu

Versions Affected

  • Canonical Ubuntu 18.04


Xiang Li discovered that Unbound incorrectly handled delegation caching. A remote attacker could use this issue to keep rogue domain names resolvable long after they have been revoked. Update Instructions: Run `sudo ua fix USN-5569-1` to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: libunbound2 – 1.6.7-1ubuntu2.5 unbound – 1.6.7-1ubuntu2.5 python3-unbound – 1.6.7-1ubuntu2.5 python-unbound – 1.6.7-1ubuntu2.5 unbound-anchor – 1.6.7-1ubuntu2.5 unbound-host – 1.6.7-1ubuntu2.5 libunbound-dev – 1.6.7-1ubuntu2.5 No subscription required

CVEs contained in this USN include: CVE-2022-30698, CVE-2022-30699.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

  • cflinuxfs3
    • All versions prior to 0.315.0
  • CF Deployment
    • All versions prior to 21.9.0


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

  • cflinuxfs3
    • Upgrade all versions to 0.315.0 or greater
  • CF Deployment
    • Upgrade all versions to 21.9.0 or greater


2022-09-29: Initial vulnerability report published.

Cloud Foundry Foundation Security Team Profile Image

Cloud Foundry Foundation Security Team, AUTHOR