Description
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.
Published: 2021-06-10
Score: 4.6 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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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.
History

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Subscriptions

Fedoraproject Fedora
Xscreensaver Project Xscreensaver
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

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

Reserved: 2021-06-10T00:00:00.000Z

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.

Weaknesses