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
Link | Resource |
---|---|
http://www.openwall.com/lists/oss-security/2021/06/11/1 | Mailing List Third Party Advisory |
http://www.openwall.com/lists/oss-security/2021/07/06/2 | Exploit Mailing List Third Party Advisory |
https://github.com/QubesOS/qubes-issues/issues/6595 | Issue Tracking Third Party Advisory |
https://github.com/QubesOS/qubes-secpack/blob/master/QSBs/qsb-068-2021.txt | Exploit Third Party Advisory |
https://github.com/QubesOS/qubes-xscreensaver/blob/master/0001-Fix-updating-outputs-info.patch | Patch Third Party Advisory |
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TC4QB7TRS4GS7LDXQQ4PC6J3LVFJYISV/ | |
https://www.openwall.com/lists/oss-security/2021/06/05/1 | Exploit Mailing List Third Party Advisory |
History
No history.
MITRE Information
Status: PUBLISHED
Assigner: mitre
Published: 2021-06-10T15:54:35
Updated: 2021-08-19T02:06:17
Reserved: 2021-06-10T00:00:00
Link: CVE-2021-34557
JSON object: View
NVD Information
Status : Modified
Published: 2021-06-10T16:15:08.227
Modified: 2023-11-07T03:36:01.347
Link: CVE-2021-34557
JSON object: View
Redhat Information
No data.
CWE