CVE-2019-3825

gdm: lock screen bypass when timed login is enabled

Severity Score

6.4

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Se ha descubierto una vulnerabilidad en gdm en versiones anteriores a la 3.31.4. Cuando el inicio de sesión temporal está habilitado en la configuración, un atacante podría omitir la pantalla de bloqueo, seleccionando el usuario de inicio de sesión temporal y esperando a que se agote el tiempo. En ese momento, obtendría acceso a la sesión del usuario que ha iniciado sesión.

A vulnerability was discovered in gdm 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.

*Credits: N/A

CVSS Scores

Attack Vector

Physical

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Physical

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Medium

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-01-03 CVE Reserved
2019-02-06 CVE Published
2023-03-08 EPSS Updated
2024-08-04 CVE Updated
2024-08-04 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-287: Improper Authentication

CAPEC

References (4)

URL	Tag	Source

URL	Date	SRC
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3825	2024-08-04

URL	Date	SRC

URL	Date	SRC
https://usn.ubuntu.com/3892-1	2019-10-09
https://access.redhat.com/security/cve/CVE-2019-3825	2020-04-28
https://bugzilla.redhat.com/show_bug.cgi?id=1672825	2020-04-28

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Gnome Search vendor "Gnome"		Gnome Display Manager Search vendor "Gnome" for product "Gnome Display Manager"				< 3.31.4 Search vendor "Gnome" for product "Gnome Display Manager" and version " < 3.31.4"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				18.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "18.04"		lts		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				18.10 Search vendor "Canonical" for product "Ubuntu Linux" and version "18.10"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				7.0 Search vendor "Redhat" for product "Enterprise Linux" and version "7.0"		-		Affected