CVE-2020-17489

gnome-shell: Password from logged-out user may be shown on login screen

Severity Score

4.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An issue was discovered in certain configurations of GNOME gnome-shell through 3.36.4. When logging out of an account, the password box from the login dialog reappears with the password still visible. If the user had decided to have the password shown in cleartext at login time, it is then visible for a brief moment upon a logout. (If the password were never shown in cleartext, only the password length is revealed.)

Se detectó un problema en determinadas configuraciones de GNOME gnome-shell versiones hasta 3.36.4. Cuando se cierra la sesión de una cuenta, el cuadro de contraseña a partir del cuadro de diálogo de inicio de sesión vuelve a aparecer con la contraseña aún visible. Si el usuario ha decidido que la contraseña se muestre en texto sin cifrar en el momento del inicio de sesión, estará visible durante un breve momento al cerrar la sesión. (Si la contraseña nunca se mostró en texto sin cifrar, solo la longitud de la contraseña es revelada)

*Credits: N/A

Attack Vector

Physical

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Local

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-08-11 CVE Reserved
2020-08-11 CVE Published
2023-04-27 EPSS Updated
2024-08-04 CVE Updated
2024-08-04 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
CWE-522: Insufficiently Protected Credentials

CAPEC

References (7)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2020/09/msg00014.html	Mailing List

URL	Date	SRC
https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/2997	2024-08-04

URL	Date	SRC

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00028.html	2021-03-26
https://security.gentoo.org/glsa/202009-08	2021-03-26
https://usn.ubuntu.com/4464-1	2021-03-26
https://access.redhat.com/security/cve/CVE-2020-17489	2022-05-10
https://bugzilla.redhat.com/show_bug.cgi?id=1868418	2022-05-10

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-shell Search vendor "Gnome" for product "Gnome-shell"				<= 3.36.4 Search vendor "Gnome" for product "Gnome-shell" and version " <= 3.36.4"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				20.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "20.04"		lts		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		Affected
Opensuse Search vendor "Opensuse"		Leap Search vendor "Opensuse" for product "Leap"				15.2 Search vendor "Opensuse" for product "Leap" and version "15.2"		-		Affected