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CVE-2021-34557

Published: 10 June 2021

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.

Priority

Medium

CVSS 3 base score: 4.6

Status

Package Release Status
xscreensaver
Launchpad, Ubuntu, Debian
bionic Needs triage

focal Needs triage

groovy Ignored
(reached end-of-life)
hirsute Ignored
(reached end-of-life)
impish Needs triage

jammy Needs triage

trusty Does not exist

upstream
Released (5.45+dfsg1-2)
xenial Ignored
(out of standard support)