CVE-2011-4029
Description
The LockServer function in os/utils.c in X.Org xserver before 1.11.2 allows local users to change the permissions of arbitrary files to 444, read those files, and possibly cause a denial of service (removed execution permission) via a symlink attack on a temporary lock file.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
Exploits
Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.
Exploit-DB
X.Org xorg 1.4 < 1.11.2 - File Permission Change
OS impact
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 2:1.11.1.901-2 |
| sid | Fixed | 2:1.11.1.901-2 |
| forky | Fixed | 2:1.11.1.901-2 |
| bullseye | Fixed | 2:1.11.1.901-2 |
| bookworm | Fixed | 2:1.11.1.901-2 |
References
- http://cgit.freedesktop.org/xorg/xserver/commit/?id=b67581cf825940fdf52bf2e0af4330e695d724a4
- http://lists.freedesktop.org/archives/xorg/2011-October/053680.html
- http://rhn.redhat.com/errata/RHSA-2012-0939.html
- http://secunia.com/advisories/46460
- http://secunia.com/advisories/49579
- https://security-tracker.debian.org/tracker/CVE-2011-4029
CWEs
CWE-362
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.