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.

CVSS v3.0 6.8 MEDIUM
CVSS v2.0 4.6 MEDIUM

6.8^/10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 0.9 / Impact : 5.9

Attack Vector PHYSICAL

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

4.6^/10

CVSS v2.0 : MEDIUM

V2 Legend

Vector : AV:L/AC:L/Au:N/C:P/I:P/A:P

Exploitability : 3.9 / Impact : 6.4

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/1900314	Third Party Advisory
https://gitlab.gnome.org/GNOME/gdm/-/issues/642	Exploit Vendor Advisory
https://securitylab.github.com/advisories/GHSL-2020-202-gdm3-LPE-unresponsive-accounts-daemon	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:gnome:gnome_display_manager::::::::
	cpe:2.3:a:gnome:gnome_display_manager::::::::

Information

Published : 2020-11-09 21:15

Updated : 2020-11-24 10:12

NVD link : CVE-2020-16125

Mitre link : CVE-2020-16125

JSON object : View

CWE

CWE-754

Improper Check for Unusual or Exceptional Conditions

Products Affected

gnome

gnome_display_manager

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6.8 /10