---
title: "CVE-2009-0033\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-2009-0033?format=md
keywords: index, follow
---

# CVE-2009-0033

Publication date 5 June 2009

Last updated 24 July 2024

---

Ubuntu priority

**Medium**

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

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## Description

Apache Tomcat 4.1.0 through 4.1.39, 5.5.0 through 5.5.27, and 6.0.0 through
6.0.18, when the Java AJP connector and mod\_jk load balancing are used,
allows remote attackers to cause a denial of service (application outage)
via a crafted request with invalid headers, related to temporary blocking
of connectors that have encountered errors, as demonstrated by an error
involving a malformed HTTP Host header.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2009-0033?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| tomcat5 | 11.10 oneiric | Not in release |
| 11.04 natty | Not in release |
| 10.10 maverick | Not in release |
| 10.04 LTS lucid | Not in release |
| 9.10 karmic | Not in release |
| 9.04 jaunty | Not in release |
| 8.10 intrepid | Not in release |
| 8.04 LTS hardy | Not in release |
| 6.06 LTS dapper | Ignored end of life |
| tomcat5.5 | 11.10 oneiric | Not in release |
| 11.04 natty | Not in release |
| 10.10 maverick | Not in release |
| 10.04 LTS lucid | Not in release |
| 9.10 karmic | Not in release |
| 9.04 jaunty | Ignored end of life |
| 8.10 intrepid | Ignored end of life, was needed |
| 8.04 LTS hardy | Ignored end of life |
| 6.06 LTS dapper | Not in release |
| tomcat6 | 11.10 oneiric | Not affected |
| 11.04 natty | Not affected |
| 10.10 maverick | Not affected |
| 10.04 LTS lucid | Not affected |
| 9.10 karmic | Not affected |
| 9.04 jaunty | Fixed 6.0.18-0ubuntu6.1 |
| 8.10 intrepid | Fixed 6.0.18-0ubuntu3.2 |
| 8.04 LTS hardy | Not in release |
| 6.06 LTS dapper | 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-2009-0033?format=md#patch-details)

## Notes

---

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

PoC: http://seclists.org/bugtraq/2009/Jun/0045.html

### 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 |
| --- | --- |
| tomcat5.5 | * Upstream:   <http://svn.apache.org/viewvc?view=rev&revision=781362> |
| tomcat6 | * Upstream:   <http://svn.apache.org/viewvc?view=rev&revision=742915> |

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0033)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2009-0033)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2009-0033)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2009-0033)

### Related Ubuntu Security Notices (USN)

+ [USN-788-1](https://usn.ubuntu.com/USN-788-1)
+ Tomcat vulnerabilities
+ 15 June 2009

### Other references

* <http://www.vupen.com/english/advisories/2009/1496>
* <https://www.cve.org/CVERecord?id=CVE-2009-0033>