Improper privilege management in lightdm
Priority LOW 34CWE-269Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Privilege escalation
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-269.
Summary
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.
Why it matters now
EPSS 0.00363 30th percentileScored 2026-11-07
Fix Fixed lightdm (lightdm): 0.9.6
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| lightdm | lightdm | before 0.9.6 | 0.9.6 | Patch available | CNA |
- lightdm Vendorlightdm Affected before 0.9.6 Fixed in 0.9.6 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:lightdm_project:lightdm:*:*:*:*:*:*:*:* | before 0.9.6 | Vulnerable | Lightdm Project |
- cpe:2.3:a:lightdm_project:lightdm:*:*:*:*:*:*:*:* Versions before 0.9.6 Vulnerable ·Lightdm Project
Remediation
- Fix · CNA lightdm (lightdm) Fixed in 0.9.6
Timeline
- 2026-10-02 Threatist record created from CVE-2011-3349
- 2026-10-03 Alias added: GHSA-m2g2-7fc9-g232
References
More Lightdm Project Lightdm vulnerabilities
- TI-2017-05013 In LightDM through 1.22.0, a directory traversal issue in debian/guest-account.sh allows… CVSS 3.0HIGH 7.3
- TI-2015-06845 Array index error in LightDM (aka Light Display Manager) 1.14.3, 1.16.x before 1.16.6… CVSS 3.0MEDIUM 5.9
- TI-2017-06397 LightDM through 1.22.0, when systemd is used in Ubuntu 16.10 and 17.x, allows physically… CVSS 3.0MEDIUM 4.6
Sources
- CVE-2011-3349 · CVE Program
- CVE-2011-3349 · NVD
- FIRST EPSS
- GHSA-m2g2-7fc9-g232 · GitHub Advisory Database · CC BY 4.0
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