---
title: "CVE-2012-2733\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-2012-2733?format=md
keywords: index, follow
---

# CVE-2012-2733

Publication date 16 November 2012

Last updated 24 July 2024

---

Ubuntu priority

**Medium**

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

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## Description

java/org/apache/coyote/http11/InternalNioInputBuffer.java in the HTTP NIO
connector in Apache Tomcat 6.x before 6.0.36 and 7.x before 7.0.28 does not
properly restrict the request-header size, which allows remote attackers to
cause a denial of service (memory consumption) via a large amount of header
data.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| tomcat6 | 13.04 raring | Not affected |
| 12.10 quantal | Fixed 6.0.35-5ubuntu0.1 |
| 12.04 LTS precise | Fixed 6.0.35-1ubuntu3.1 |
| 11.10 oneiric | Fixed 6.0.32-5ubuntu1.3 |
| 10.04 LTS lucid | Fixed 6.0.24-2ubuntu1.11 |
| 8.04 LTS hardy | Not in release |
| tomcat7 | 13.04 raring | Not affected |
| 12.10 quantal | Not affected |
| 12.04 LTS precise | Fixed 7.0.26-1ubuntu1.2 |
| 11.10 oneiric | Fixed 7.0.21-1ubuntu0.1 |
| 10.04 LTS lucid | Not in release |
| 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)
* [Patch details](https://ubuntu.com/security/CVE-2012-2733?format=md#patch-details)

### 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 |
| --- | --- |
| tomcat6 | * Upstream:   <http://svn.apache.org/viewvc?view=revision&revision=1356208> |
| tomcat7 | * Upstream:   <http://svn.apache.org/viewvc?view=revision&revision=1350301> |

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-2733)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2012-2733)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2012-2733)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2012-2733)

### Related Ubuntu Security Notices (USN)

+ [USN-1637-1](https://usn.ubuntu.com/USN-1637-1)
+ Tomcat vulnerabilities
+ 21 November 2012

### Other references

* <http://tomcat.apache.org/security-7.html>
* <http://tomcat.apache.org/security-6.html>
* <https://www.cve.org/CVERecord?id=CVE-2012-2733>