CVE-2011-3349

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-11-19 · updated 2026-06-16
Weakness: CWE-269

Description

lightdm before 0.9.6 writes in .dmrc and Xauthority files using root permissions while the files are in user controlled folders. A local user can overwrite root-owned files via a symlink, which can allow possible privilege escalation.

Affected products

lightdm: before 0.9.6 — fixed in 0.9.6

How to fix

Upgrade to a fixed version: lightdm 0.9.6. Check the vendor advisory for mitigations.

References

https://access.redhat.com/security/cve/cve-2011-3349
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=639151
https://bugs.launchpad.net/debian/+source/lightdm/+bug/834079
https://seclists.org/oss-sec/2011/q3/393
https://security-tracker.debian.org/tracker/CVE-2011-3349
https://www.securityfocus.com/bid/50506
https://access.redhat.com/security/cve/cve-2011-3349
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=639151
https://bugs.launchpad.net/debian/+source/lightdm/+bug/834079
https://seclists.org/oss-sec/2011/q3/393
https://security-tracker.debian.org/tracker/CVE-2011-3349
https://www.securityfocus.com/bid/50506

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