Auth bypass in GNOME Display Manager
CVE-2019-3825
A vulnerability was discovered in gdm before 3.31.4. When timed login is enabled in configuration, an attacker could bypass the lock screen by selecting the timed login user and waiting for the timer to expire, at which time they would gain access to the logged-in user's session.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.0/AV:P/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (40.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 40.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- GNOME Display Manager
- The GNOME Projectr Gdm — versions 3.31.4
- Canonical Ubuntu Linux — versions 18.04, 18.10
- Red Hat Enterprise Linux — versions 7.0
Weakness classification (CWE)
References
- usn.ubuntu.com/3892-1/ (vendor-advisory, Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (Exploit, Third Party Advisory, Mitigation, Issue Tracking)
Frequently asked questions
- What is CVE-2019-3825?
- CVE-2019-3825 is a medium-severity vulnerability in GNOME Display Manager, classified under Improper Authentication. CVSS score: 6.3/10. Published 2019-02-06.
- How severe is CVE-2019-3825?
- Medium severity. CVSS v3 base score is 6.3 out of 10.