XScreenSaver 5.45 can be bypassed if the machine has more than ten disconnectable video outputs. A buffer overflow in update_screen_layout() allows an attacker to bypass the standard screen lock authentication mechanism by crashing XScreenSaver. The attacker must physically disconnect many video outputs.
Advisories
Source ID Title
EUVD EUVD EUVD-2021-21207 XScreenSaver 5.45 can be bypassed if the machine has more than ten disconnectable video outputs. A buffer overflow in update_screen_layout() allows an attacker to bypass the standard screen lock authentication mechanism by crashing XScreenSaver. The attacker must physically disconnect many video outputs.
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-04T00:12:50.416Z

Reserved: 2021-06-10T00:00:00

Link: CVE-2021-34557

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2021-06-10T16:15:08.227

Modified: 2024-11-21T06:10:40.827

Link: CVE-2021-34557

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.