---
title: "CVE-2011-4869\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2011-4869?format=md
keywords: index, follow
---

# CVE-2011-4869

Publication date 20 December 2011

Last updated 24 July 2024

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

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## 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.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| unbound | 11.10 oneiric | Fixed 1.4.12-1ubuntu1 |
| 11.04 natty | Fixed 1.4.9-0ubuntu1.2 |
| 10.10 maverick | Fixed 1.4.5-1ubuntu1.2 |
| 10.04 LTS lucid | Fixed 1.4.1-2ubuntu0.2 |
| 8.04 LTS hardy | Not in release |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-4869)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2011-4869)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2011-4869)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2011-4869)

### Other references

* <http://www.kb.cert.org/vuls/id/209659>
* <http://unbound.nlnetlabs.nl/downloads/CVE-2011-4528.txt>
* <https://www.cve.org/CVERecord?id=CVE-2011-4869>