---
title: "CVE-2011-4461\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-2011-4461?format=md
keywords: index, follow
---

# CVE-2011-4461

Publication date 29 December 2011

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**5.3 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2011-4461?format=md#impact-score)

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## Description

Jetty 8.1.0.RC2 and earlier computes hash values for form parameters
without restricting the ability to trigger hash collisions predictably,
which allows remote attackers to cause a denial of service (CPU
consumption) by sending many crafted parameters.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2011-4461?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| jetty | 14.04 LTS trusty | Not affected |
| 13.10 saucy | Ignored end of life |
| 13.04 raring | Ignored end of life |
| 12.10 quantal | Ignored end of life |
| 12.04 LTS precise | Fixed 6.1.24-6ubuntu0.12.04.1 |
| 11.10 oneiric | Ignored end of life |
| 11.04 natty | Fixed 6.1.24-6ubuntu0.11.04.1 |
| 10.10 maverick | Ignored end of life |
| 10.04 LTS lucid | Fixed 6.1.22-1ubuntu1.1 |
| 8.04 LTS hardy | Not affected |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)
* [Patch details](https://ubuntu.com/security/CVE-2011-4461?format=md#patch-details)

## Notes

---

### [mdeslaur](https://launchpad.net/~mdeslaur)

in main in lucid, maverick, natty only

### Patch details

For informational purposes only. We recommend not to cherry-pick updates. [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)

| Package | Patch details |
| --- | --- |
| jetty | * Upstream:   [085c79d](https://github.com/eclipse/jetty.project/commit/085c79d7d6cfbccc02821ffdb64968593df3e0bf) |

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

5.3 · Medium

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Network |
  | Attack complexity | Low |
  | Privileges required | None |
  | User interaction | None |
  | Scope | Unchanged |
  | Confidentiality impact | None |
  | Integrity impact | None |
  | Availability impact | Low |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 5.3 · Medium |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-4461)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2011-4461)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2011-4461)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2011-4461)

### Related Ubuntu Security Notices (USN)

+ [USN-1429-1](https://usn.ubuntu.com/USN-1429-1)
+ Jetty vulnerability
+ 26 April 2012

### Other references

* <http://www.kb.cert.org/vuls/id/903934>
* <http://www.ocert.org/advisories/ocert-2011-003.html>
* <http://www.nruns.com/_downloads/advisory28122011.pdf>
* <http://dev.eclipse.org/mhonarc/lists/jetty-users/msg01818.html>
* <https://www.cve.org/CVERecord?id=CVE-2011-4461>