# CVE-2006-4018: Memory corruption in n/a

> Remote attackers can execute arbitrary code by sending a crafted UPX packed file to systems using the vulnerable ClamAV library.

- **Severity:** High 7.5 (`AV:N/AC:L/Au:N/C:P/I:P/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 8 Aug 2006
- **Updated:** 7 Aug 2024
- **Also known as:** DEBIAN-CVE-2006-4018, DSA-1153, GHSA-4jgv-gpc4-9rmg

## What is CVE-2006-4018?

CVE-2006-4018 is a high-severity memory corruption vulnerability in Clamav Clamav, published on 8 Aug 2006. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official 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.

Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2006-4018?

It affects 1 product.


Products: Clamav Clamav.

## How do I fix CVE-2006-4018?

Upgrade to a fixed version.

## Is CVE-2006-4018 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2006-4018 exists.

Public exploit code:

- Clam Anti-Virus ClamAV 0.88.x - UPX Compressed PE File Heap Buffer Overflow (exploitdb)

## Other vulnerabilities in Clamav Clamav

- [CVE-2010-0098](https://insights.sbomify.com/CVE-2010-0098/): Security feature bypass in n/a (critical 10.0)
- [CVE-2009-1372](https://insights.sbomify.com/CVE-2009-1372/): Memory corruption in n/a (critical 10.0)
- [CVE-2008-3914](https://insights.sbomify.com/CVE-2008-3914/): Denial of service in n/a (critical 10.0)
- [CVE-2008-0728](https://insights.sbomify.com/CVE-2008-0728/): Memory corruption in n/a (critical 10.0)
- [CVE-2006-1615](https://insights.sbomify.com/CVE-2006-1615/): Other in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2006-4018 and fix it if it is affected.

What it is: CVE-2006-4018 is a high-severity memory corruption vulnerability in Clamav Clamav, published on 8 Aug 2006. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2006-4018 exists.

Affected product: Clamav Clamav. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2006-4018/ (Markdown: https://insights.sbomify.com/CVE-2006-4018/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2006-4018
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2006-4018
- OSV: https://osv.dev/vulnerability/CVE-2006-4018

---
From sbomify Insights: https://insights.sbomify.com/CVE-2006-4018/
Summaries are generated and may contain mistakes; the official description above is the record.