Vulnerability Details : CVE-2020-16125
Potential exploit
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.
Products affected by CVE-2020-16125
- cpe:2.3:a:gnome:gnome_display_manager:*:*:*:*:*:*:*:*
- cpe:2.3:a:gnome:gnome_display_manager:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-16125
17.56%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 95 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-16125
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
4.6
|
MEDIUM | AV:L/AC:L/Au:N/C:P/I:P/A:P |
3.9
|
6.4
|
NIST | |
6.8
|
MEDIUM | CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
0.9
|
5.9
|
NIST | |
7.2
|
HIGH | CVSS:3.1/AV:P/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H |
0.5
|
6.0
|
Canonical Ltd. |
CWE ids for CVE-2020-16125
-
The product does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the product.Assigned by:
- nvd@nist.gov (Primary)
- security@ubuntu.com (Secondary)
References for CVE-2020-16125
-
https://gitlab.gnome.org/GNOME/gdm/-/issues/642
gdm3 privilege escalation due to unresponsive accounts-daemon (GHSL-2020-202) (#642) · Issues · GNOME / gdm · GitLabExploit;Vendor Advisory
-
https://securitylab.github.com/advisories/GHSL-2020-202-gdm3-LPE-unresponsive-accounts-daemon
GHSL-2020-202: Local Privilege Escalation (LPE) in Ubuntu gdm3 - CVE-2020-16125 - GitHub Security LabExploit;Third Party Advisory
-
https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/1900314
Bug #1900314 “Privilege escalation using vulnerabilities in gdm3...” : Bugs : gdm3 package : UbuntuThird Party Advisory
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