--- title: "CVE-2011-4029\n | Ubuntu" description: Ubuntu is an open source software operating system that runs from the desktop, to the cloud, to all your internet connected things. url: https://ubuntu.com/security/CVE-2011-4029?format=md keywords: index, follow --- # CVE-2011-4029 Publication date 18 October 2011 Last updated 24 July 2024 --- Ubuntu priority **High** [Why this priority?](https://ubuntu.com/security/cves/about#priority ) Toggle side navigation ## 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. ## Status Show unmaintained releases | Package | Ubuntu Release | Status | | --- | --- | --- | | xorg-server | 11.10 oneiric | Fixed 2:1.10.4-1ubuntu4.1 | | 11.04 natty | Fixed 2:1.10.1-1ubuntu1.3 | | 10.10 maverick | Fixed 2:1.9.0-0ubuntu7.5 | | 10.04 LTS lucid | Fixed 2:1.7.6-2ubuntu7.8 | | 8.04 LTS hardy | Ignored end of life | --- * [How can I get the fixes?](https://ubuntu.com/security/cves/about#security) * [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses) ## References * [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-4029) * [NVD](https://nvd.nist.gov/vuln/detail/CVE-2011-4029) * [Launchpad](https://launchpad.net/bugs/cve/CVE-2011-4029) * [Debian](https://security-tracker.debian.org/tracker/CVE-2011-4029) ### Related Ubuntu Security Notices (USN) + [USN-1232-1](https://usn.ubuntu.com/USN-1232-1) + X.Org X server vulnerabilities + 18 October 2011 ### Other references *