{"id":"CVE-2011-4029","url":"https://www.cyber-defence.io/tools/cve/CVE-2011-4029","generatedAt":"2026-10-28T03:21:31.925Z","title":"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…","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.","published":"2012-07-03T19:55:02.000Z","lastModified":"2026-06-16T23:34:19.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"2.0","score":1.9,"severity":"LOW","vector":"AV:L/AC:M/Au:N/C:P/I:N/A:N"},"cwe":["CWE-362"],"affected":["x.org/x server"],"epss":{"score":0.00605,"percentile":0.4865,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":1,"verified":false,"firstPublished":"2011-10-28","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":18040,"kind":"exploit","title":"X.Org xorg 1.4 < 1.11.2 - File Permission Change","url":"https://www.exploit-db.com/exploits/18040","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/linux/local/18040.c","file":"exploits/linux/local/18040.c","published":"2011-10-28","added":"2011-10-28","updated":"2018-01-25","author":"vladz","type":"local","platform":"linux","port":null,"verified":false,"codes":["CVE-2011-4613","OSVDB-84058","CVE-2011-4029","OSVDB-76669"],"tags":null,"aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":null}]},"verdict":{"level":"high","text":"A public exploit is published in Exploit-DB, so the technical barrier is gone even though the severity is low and EPSS is 0.6%. Treat it as high on anything reachable from the internet."},"changes":[],"references":[{"url":"http://cgit.freedesktop.org/xorg/xserver/commit/?id=b67581cf825940fdf52bf2e0af4330e695d724a4","tags":["Patch"],"source":"cve@mitre.org"},{"url":"http://lists.freedesktop.org/archives/xorg/2011-October/053680.html","source":"cve@mitre.org"},{"url":"http://rhn.redhat.com/errata/RHSA-2012-0939.html","source":"cve@mitre.org"},{"url":"http://secunia.com/advisories/46460","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://secunia.com/advisories/49579","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://cgit.freedesktop.org/xorg/xserver/commit/?id=b67581cf825940fdf52bf2e0af4330e695d724a4","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.freedesktop.org/archives/xorg/2011-October/053680.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://rhn.redhat.com/errata/RHSA-2012-0939.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/46460","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/49579","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2011-4029","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}