---
title: "CVE-2005-4591\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-2005-4591?format=md
keywords: index, follow
---

# CVE-2005-4591

Publication date 31 December 2005

Last updated 17 July 2025

---

Ubuntu priority

**Medium**

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

Toggle side navigation

## Description

Heap-based buffer overflow in bogofilter 0.96.2, 0.95.2, 0.94.14, 0.94.12,
and other versions from 0.93.5 to 0.96.2, when using Unicode databases,
allows remote attackers to cause a denial of service (crash) and possibly
execute arbitrary code via "invalid input sequences" that lead to heap
corruption when bogofilter or bogolexer converts character sets.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| bogofilter | 7.04 feisty | Fixed 1.0.1-1ubuntu1 |
| 6.10 edgy | Fixed 1.0.1-1ubuntu1 |
| 6.06 LTS dapper | Fixed 1.0.1-1ubuntu1 |

---

* [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-2005-4591)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2005-4591)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2005-4591)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2005-4591)

### Related Ubuntu Security Notices (USN)

+ [USN-240-1](https://usn.ubuntu.com/USN-240-1)
+ bogofilter vulnerability
+ 12 January 2006

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2005-4591>