Vulnerability in GNOME Gdm3
CVE-2020-16125
gdm3 versions before 3.36.2 or 3.38.2 would start gnome-initial-setup if gdm3 can't contact the accountservice service via dbus in a timely manner; on Ubuntu (and potentially derivatives) this could be be chained with an additional issue that could allow a local user to create a new privileged account.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:P/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.011 (64.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 64.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000
Affected products
- GNOME Gdm3 — versions 3.36, 3.38
- GNOME Display Manager
Weakness classification (CWE)
Public proof-of-concept exploits
References
- gitlab.gnome.org/GNOME/gdm/-/issues/642 (Exploit, Vendor Advisory)
- bugs.launchpad.net/ubuntu/+source/gdm3/+bug/1900314 (Third Party Advisory)
- securitylab.github.com/advisories/GHSL-2020-202-gdm3-LPE-unresponsive-accounts-… (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-16125?
- CVE-2020-16125 is a high-severity vulnerability in GNOME Gdm3, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 7.2/10. Published 2020-11-10.
- How severe is CVE-2020-16125?
- High severity. CVSS v3 base score is 7.2 out of 10.
- Is CVE-2020-16125 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.