CVE-2020-27837

CVSS V2 Medium 4.4 CVSS V3 Medium 6.4

Description

A flaw was found in GDM in versions prior to 3.38.2.1. A race condition in the handling of session shutdown makes it possible to bypass the lock screen for a user that has autologin enabled, accessing their session without authentication. This is similar to CVE-2017-12164, but requires more difficult conditions to exploit.

Overview

CVE ID
CVE-2020-27837

Assigner
secalert@redhat.com

Vulnerability Status
Analyzed

Published Version
2020-12-28T19:15:13

Last Modified Date
2020-12-30T15:26:54

Weakness Enumerations

CWE	URL
CWE-362	http://cwe.mitre.org/data/definitions/362.html

CPE Configuration (Product)

CPE	Vulnerable	Operator	Version Start	Version End
cpe:2.3:a:gnome:gnome_display_manager::::::::	1	OR		3.38.2.1

CVSS Version 2

Version
2.0

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

Access Vector
LOCAL

Access Compatibility
MEDIUM

Authentication
NONE

Confidentiality Impact
PARTIAL

Integrity Impact
PARTIAL

Availability Impact
PARTIAL

Base Score
4.4

Severity
MEDIUM

Exploitability Score
3.4

Impact Score
6.4

CVSS Version 3

Version
3.1

Vector String
CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
PHYSICAL

Attack Compatibility
HIGH

Privileges Required
NONE

User Interaction
NONE

Scope
UNCHANGED

Confidentiality Impact
HIGH

Availability Impact
HIGH

Base Score
6.4

Base Severity
MEDIUM

Exploitability Score
0.5

Impact Score
5.9

References

Reference URL	Reference Tags
https://bugzilla.redhat.com/show_bug.cgi?id=1906812	Issue Tracking Patch Third Party Advisory

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2020-27837
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27837

History

Created	Old Value	New Value	Data Type	Notes
2022-05-10 07:29:10				Added to TrackCVE
2022-12-05 18:54:55	2020-12-28T19:15Z	2020-12-28T19:15:13	CVE Published Date	updated
2022-12-05 18:54:55		2020-12-30T15:26:54	CVE Modified Date	updated
2022-12-05 18:54:55		Analyzed	Vulnerability Status	updated