DEBIAN-CVE-2021-34557

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Source
https://security-tracker.debian.org/tracker/CVE-2021-34557
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-34557.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2021-34557
Upstream
Published
2021-06-10T16:15:08Z
Modified
2025-09-30T03:54:27Z
Severity
  • 4.6 (Medium) CVSS_V3 - CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

XScreenSaver 5.45 can be bypassed if the machine has more than ten disconnectable video outputs. A buffer overflow in updatescreenlayout() allows an attacker to bypass the standard screen lock authentication mechanism by crashing XScreenSaver. The attacker must physically disconnect many video outputs.

References

Affected packages

Debian:11 / xscreensaver

Package

Name
xscreensaver
Purl
pkg:deb/debian/xscreensaver?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.45+dfsg1-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:12 / xscreensaver

Package

Name
xscreensaver
Purl
pkg:deb/debian/xscreensaver?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.45+dfsg1-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / xscreensaver

Package

Name
xscreensaver
Purl
pkg:deb/debian/xscreensaver?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.45+dfsg1-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:14 / xscreensaver

Package

Name
xscreensaver
Purl
pkg:deb/debian/xscreensaver?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.45+dfsg1-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}