Cloud Foundry Logo
blog single gear
Security Advisory

USN-6791-1: Unbound vulnerability

Severity

Low

Vendor

Canonical Ubuntu

Versions Affected

  • Canonical Ubuntu 22.04

Description

It was discovered that Unbound could take part in a denial of service amplification attack known as DNSBomb. This update introduces certain resource limits to make the impact from Unbound significantly lower. Update Instructions: Run `sudo pro fix USN-6791-1` to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: libunbound-dev – 1.9.4-2ubuntu1.6 libunbound8 – 1.9.4-2ubuntu1.6 python-unbound – 1.9.4-2ubuntu1.6 python3-unbound – 1.9.4-2ubuntu1.6 unbound – 1.9.4-2ubuntu1.6 unbound-anchor – 1.9.4-2ubuntu1.6 unbound-host – 1.9.4-2ubuntu1.6 No subscription required

CVEs contained in this USN include: CVE-2024-33655.

Affected Cloud Foundry Products and Versions

Severity is low unless otherwise noted.

  • cflinuxfs4
    • All versions prior to 1.99.0
  • CF Deployment
    • All versions prior to 41.0.0

Mitigation

Users of affected products are strongly encouraged to follow the mitigations below.

The Cloud Foundry project recommends upgrading the following releases:

  • cflinuxfs4
    • Upgrade all versions to 1.99.0 or greater
  • CF Deployment
    • Upgrade all versions to 41.0.0 or greater

History

2024-07-25: Initial vulnerability report published.

Cloud Foundry Foundation Security Team Profile Image

Cloud Foundry Foundation Security Team, AUTHOR

SEE ALL ARTICLES