---
title: "CVE-2012-5533\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-2012-5533?format=md
keywords: index, follow
---

# CVE-2012-5533

Publication date 24 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

The http\_request\_split\_value function in request.c in lighttpd before
1.4.32 allows remote attackers to cause a denial of service (infinite loop)
via a request with a header containing an empty token, as demonstrated
using the "Connection: TE,,Keep-Alive" header.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| lighttpd | 12.10 quantal | Not affected |
| 12.04 LTS precise | Not affected |
| 11.10 oneiric | Not affected |
| 10.04 LTS lucid | Not affected |
| 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-2012-5533?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 |
| --- | --- |
| lighttpd | * Upstream:   <http://download.lighttpd.net/lighttpd/security/lighttpd-1.4.31_fix_connection_header_dos.patch> |

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-5533)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2012-5533)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2012-5533)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2012-5533)

### Other references

* <http://www.securitytracker.com/id?1027802>
* <http://www.openwall.com/lists/oss-security/2012/11/21/1>
* <http://www.exploit-db.com/exploits/22902>
* <http://secunia.com/advisories/51298>
* <http://secunia.com/advisories/51268>
* <http://osvdb.org/87623>
* <http://lists.opensuse.org/opensuse-updates/2012-11/msg00044.html>
* <http://download.lighttpd.net/lighttpd/security/lighttpd_sa_2012_01.txt>
* <http://download.lighttpd.net/lighttpd/security/lighttpd-1.4.31_fix_connection_header_dos.patch>
* <https://www.cve.org/CVERecord?id=CVE-2012-5533>