SB2024100304 - Ubuntu update for gnome-shell

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Main Vulnerability Database SB2024100304

SB2024100304 - Ubuntu update for gnome-shell

Published: October 3, 2024

Security Bulletin ID SB2024100304
Severity
High
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 50% Medium 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Input validation error (CVE-ID: CVE-2017-8288)

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

gnome-shell 3.22 through 3.24.1 mishandles extensions that fail to reload, which can lead to leaving extensions enabled in the lock screen. With these extensions, a bystander could launch applications (but not interact with them), see information from the extensions (e.g., what applications you have opened or what music you were playing), or even execute arbitrary commands. It all depends on what extensions a user has enabled. The problem is caused by lack of exception handling in js/ui/extensionSystem.js.


2) Security restrictions bypass (CVE-ID: CVE-2019-3820)

The vulnerability allows a physical attacker to bypass security restrictions on the system.

The vulnerability exists due to the lock screen feature does not properly restrict all contextual actions. A physical attacker can click on the password text field to bypass the lock screen and re-enable certain keyboard shortcuts, which the attacker can use to perform unauthorized actions on the system.


Remediation

Install update from vendor's website.

References