Buffer Overflow Affecting xscreensaver package, versions *


Severity

Recommended
low

Based on Debian security rating.

Threat Intelligence

EPSS
0.12% (49th percentile)

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  • Snyk IDSNYK-DEBIAN10-XSCREENSAVER-1303185
  • published11 Jun 2021
  • disclosed10 Jun 2021

Introduced: 10 Jun 2021

CVE-2021-34557  (opens in a new tab)
CWE-120  (opens in a new tab)

How to fix?

There is no fixed version for Debian:10 xscreensaver.

NVD Description

Note: Versions mentioned in the description apply only to the upstream xscreensaver package and not the xscreensaver package as distributed by Debian. See How to fix? for Debian:10 relevant fixed versions and status.

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 Scores

version 3.1