Severity

medium

Vendor

VMware Tanzu

Versions Affected

• Canonical Ubuntu 22.04

Elias Heftrig, Haya Schulmann, Niklas Vogel, and Michael Waidner discovered that Unbound incorrectly handled validating DNSSEC messages. A remote attacker could possibly use this issue to cause Unbound to consume resources, leading to a denial of service. (CVE-2023-50387) It was discovered that Unbound incorrectly handled preparing an NSEC3 closest encloser proof. A remote attacker could possibly use this issue to cause Unbound to consume resources, leading to a denial of service. (CVE-2023-50868) Update Instructions: Run `sudo pro fix USN-6665-1` to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: unbound - 1.9.4-2ubuntu1.5 python3-unbound - 1.9.4-2ubuntu1.5 libunbound8 - 1.9.4-2ubuntu1.5 python-unbound - 1.9.4-2ubuntu1.5 unbound-anchor - 1.9.4-2ubuntu1.5 unbound-host - 1.9.4-2ubuntu1.5 libunbound-dev - 1.9.4-2ubuntu1.5 No subscription required.

Fixed and Unaffected VMware Products and Versions

• Cflinixfs4
• 1.70.0 or greater
• CF Deployment
• 39.3.0 or greater
• Isolation Segment
• 4.0.19+LTS-T or greater
• 5.0.9 or greater
• 6.0.x unaffected
• VMware Tanzu Applications Service for VMs
• 4.0.19+LTS-T or greater
• 5.0.9 or greater
• 6.0.x unaffected

References

https://ubuntu.com/security/notices/USN-6665-1

https://www.cloudfoundry.org/blog/usn-6665-1

https://cve.mitre.org/cgi-bin/cvename.cgi?name=usn-6665-1

https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/24836

History

2024-02-28: Initial vulnerability report published.