CVE-2011-4869
7.8 · HIGHOverview
CVE-2011-4869 is a high-severity vulnerability affecting unbound unbound. It was published on December 20, 2011 and has a CVSS 2.0 base score of 7.8 (HIGH).
This vulnerability has a CVSS 2.0 base score of 7.8, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
validator/val_nsec3.c in Unbound before 1.4.13p2 does not properly perform proof processing for NSEC3-signed zones, which allows remote DNS servers to cause a denial of service (daemon crash) via a malformed response that lacks expected NSEC3 records, a different vulnerability than CVE-2011-4528.
Remediation
Check the references section for vendor advisories and patches from unbound. Update unbound to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| unbound | unbound | 0 | Affected |
References
Frequently Asked Questions
What is CVE-2011-4869?
CVE-2011-4869 is a high-severity vulnerability affecting unbound unbound. It was published on December 20, 2011 and has a CVSS 2.0 base score of 7.8 (HIGH).
How severe is CVE-2011-4869?
This vulnerability has a CVSS 2.0 base score of 7.8, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2011-4869?
Check the references section for vendor advisories and patches from unbound. Update unbound to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2011-4869?
CyberStrike's AI-powered security agents can automatically detect CVE-2011-4869 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
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