CVE-2017-8900
UnknownEPSS 0.42%
Last modified
CVE-2017-8900 is a vulnerability of currently unknown severity. LightDM through 1.22.0, when systemd is used in Ubuntu 16.10 and 17.x, allows physically proximate attackers to bypass intended AppArmor restrictions and visit the home directories of arbitrary users by establishing a guest session.. EPSS estimates a 0.42% chance of exploitation in the next 30 days.
Description
LightDM through 1.22.0, when systemd is used in Ubuntu 16.10 and 17.x, allows physically proximate attackers to bypass intended AppArmor restrictions and visit the home directories of arbitrary users by establishing a guest session.
Metrics
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Lightdm Project | Lightdm | <= 1.22.0 |
References
- http://www.securityfocus.com/bid/98554Third Party Advisory, VDB Entry
- https://launchpad.net/bugs/1663157Issue Tracking, Patch, Vendor Advisory
- https://people.canonical.com/~ubuntu-security/cve/2017/CVE-2017-8900.htmlPatch, Vendor Advisory
- https://www.ubuntu.com/usn/usn-3285-1/Patch, Vendor Advisory
- http://www.securityfocus.com/bid/98554Third Party Advisory, VDB Entry
- https://launchpad.net/bugs/1663157Issue Tracking, Patch, Vendor Advisory
- https://people.canonical.com/~ubuntu-security/cve/2017/CVE-2017-8900.htmlPatch, Vendor Advisory
- https://www.ubuntu.com/usn/usn-3285-1/Patch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2017-8900?
LightDM through 1.22.0, when systemd is used in Ubuntu 16.10 and 17.x, allows physically proximate attackers to bypass intended AppArmor restrictions and visit the home directories of arbitrary users by establishing a guest session.
How severe is CVE-2017-8900?
Severity scoring for CVE-2017-8900 is pending analysis. The EPSS model estimates a 0.42% probability of exploitation in the next 30 days.
How do I fix CVE-2017-8900?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2017-8900?
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Scan your code nowSource: NVD / NIST