---
title: "CVE-2006-4018\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-2006-4018?format=md
keywords: index, follow
---

# CVE-2006-4018

Publication date 8 August 2006

Last updated 17 July 2025

---

Ubuntu priority

**Medium**

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

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## Description

Heap-based buffer overflow in the pefromupx function in libclamav/upx.c in
Clam AntiVirus (ClamAV) 0.81 through 0.88.3 allows remote attackers to
execute arbitrary code via a crafted UPX packed file containing sections
with large rsize values.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| clamav | 7.10 gutsy | Fixed 0.91.2-3ubuntu1 |
| 7.04 feisty | Fixed 0.90.2-0ubuntu1.3 |
| 6.10 edgy | Ignored end of life, was needed |
| 6.06 LTS dapper | Fixed 0.88.2-1ubuntu1.3 |

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* [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-2006-4018)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2006-4018)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2006-4018)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2006-4018)

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2006-4018>