CVE - CVE-2021-34557

CVE-ID
CVE-2021-34557	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
FEDORA:FEDORA-2021-5af4452ffd URL:https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TC4QB7TRS4GS7LDXQQ4PC6J3LVFJYISV/ MISC:https://github.com/QubesOS/qubes-issues/issues/6595 MISC:https://github.com/QubesOS/qubes-secpack/blob/master/QSBs/qsb-068-2021.txt MISC:https://github.com/QubesOS/qubes-xscreensaver/blob/master/0001-Fix-updating-outputs-info.patch MISC:https://www.openwall.com/lists/oss-security/2021/06/05/1 MLIST:[oss-security] 20210611 Re: XScreenSaver 5.45: Disconnecting a video output can cause XScreenSaver to crash and unlock URL:http://www.openwall.com/lists/oss-security/2021/06/11/1 MLIST:[oss-security] 20210706 xscreensaver 5.45 crash URL:http://www.openwall.com/lists/oss-security/2021/07/06/2
Assigning CNA
MITRE Corporation
Date Record Created
20210610	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20210610)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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