Name: CVE-2021-34557: Buffer Copy without Checking Size of Input
Creator: Rapid7
Published: 2021-06-10T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2021-34557, CWE-120, CVSS 4.6, EPSS 0.00066

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.

CVSS Details

CVSS 3.1 Base Score: 4.6
CVSS 3.1 Vector: (CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Alpine Linux	—	Upgrade xscreensaver	Aug 22, 2024	Jun 10, 2021
Debian	—	Upgrade xscreensaver	Jul 30, 2024	Jun 10, 2021
Suse	—	Upgrade xscreensaver-data-extraUpgrade xscreensaver-dataUpgrade xscreensaver-langUpgrade xscreensaver	Oct 26, 2022	Jun 10, 2021

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CVSS Details

Covered by Rapid7

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