A vulnerability in gnome-shell could allow a local attacker to gain unauthorized access to a targeted system.
The vulnerability exists because the lock screen feature of the affected software does not properly restrict all contextual actions. An attacker with physical access to a targeted, locked workstation could exploit this vulnerability by right clicking on the password text field. A successful exploit could allow the attacker to bypass the lock screen and re-enable certain keyboard shortcuts, which the attacker could use to perform unauthorized actions on the system.
The GNOME project has confirmed the vulnerability and released software updates.
To exploit this vulnerability, an attacker must have physical access to the targeted system. This access requirement may reduce the likelihood of a successful exploit.
Administrators are advised to apply the appropriate updates.
Administrators are advised to implement physical security for production systems.
Administrators are advised to allow only trusted users to access local systems.
Administrators are advised to monitor critical systems.
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Cisco Multivendor Vulnerability Alerts respond to vulnerabilities identified in third-party vendors' products. These alerts contain information compiled from diverse sources and provide comprehensive technical descriptions, objective analytical assessments, workarounds and practical safeguards, and links to vendor advisories and patches.