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CVE-2021-34557

nvd nist
Published: Jun 10, 2021Modified: Nov 21, 2024

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4.6
Vector
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploitability: 0.9 / Impact: 3.6
Source: NVD

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.

Affected (2)

Xscreensaver Project
1 product
Xscreensaver
Fedoraproject
1 product
Fedora
Configuration A
1 vulnerable
Vulnerable SoftwareAffected Versions
Xscreensaver
Version 5.45
Configuration B
1 vulnerable
Vulnerable SoftwareAffected Versions
Fedora
Version 33

Related CWEs

CWE-120
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow.

References (14)

Source: cve@mitre.org
Mailing ListThird Party Advisory
Source: cve@mitre.org
ExploitMailing ListThird Party Advisory
Source: cve@mitre.org
Issue TrackingThird Party Advisory
Source: cve@mitre.org
ExploitThird Party Advisory
Source: cve@mitre.org
PatchThird Party Advisory
Source: cve@mitre.org
Source: cve@mitre.org
ExploitMailing ListThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing ListThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
ExploitMailing ListThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Issue TrackingThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
ExploitThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
PatchThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Source: af854a3a-2127-422b-91ae-364da2661108
ExploitMailing ListThird Party Advisory

Timeline

No history available yet.