CVE-2020-17489

Publication date 11 August 2020

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

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.)

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
gnome-shell	20.04 LTS focal	Fixed 3.36.4-1ubuntu1~20.04.2
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not in release

Notes

mdeslaur

per upstream bug, appears to have been introduced in 3.34

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
gnome-shell	Upstream: 13137aa

Severity score breakdown

Parameter	Value
Base score	4.3 · Medium
Attack vector	Physical
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Unchanged
Confidentiality	High
Integrity impact	None
Availability impact	None
Vector	CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

References

Related Ubuntu Security Notices (USN)

USN-4464-1
GNOME Shell vulnerability
18 August 2020