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.
References
Configurations
History
21 Nov 2024, 06:10
| Type | Values Removed | Values Added |
|---|---|---|
| References | () http://www.openwall.com/lists/oss-security/2021/06/11/1 - Mailing List, Third Party Advisory | |
| References | () http://www.openwall.com/lists/oss-security/2021/07/06/2 - Exploit, Mailing List, Third Party Advisory | |
| References | () https://github.com/QubesOS/qubes-issues/issues/6595 - Issue Tracking, Third Party Advisory | |
| References | () https://github.com/QubesOS/qubes-secpack/blob/master/QSBs/qsb-068-2021.txt - Exploit, Third Party Advisory | |
| References | () https://github.com/QubesOS/qubes-xscreensaver/blob/master/0001-Fix-updating-outputs-info.patch - Patch, Third Party Advisory | |
| References | () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TC4QB7TRS4GS7LDXQQ4PC6J3LVFJYISV/ - | |
| References | () https://www.openwall.com/lists/oss-security/2021/06/05/1 - Exploit, Mailing List, Third Party Advisory |
07 Nov 2023, 03:36
| Type | Values Removed | Values Added |
|---|---|---|
| References |
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Information
Published : 2021-06-10 16:15
Updated : 2024-11-21 06:10
NVD link : CVE-2021-34557
Mitre link : CVE-2021-34557
CVE.ORG link : CVE-2021-34557
JSON object : View
Products Affected
fedoraproject
- fedora
xscreensaver_project
- xscreensaver
CWE
CWE-120
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')