← Voltar para CVEs

CVE-2021-34557

MEDIUM

4.6

Descricao

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.

Detalhes CVE

Pontuacao CVSS v3.14.6

SeveridadeMEDIUM

Vetor CVSSCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Vetor de ataquePHYSICAL

ComplexidadeLOW

Privilegios necessariosNONE

Interacao do usuarioNONE

Publicado6/10/2021

Ultima modificacao11/21/2024

Fontenvd

Avistamentos honeypot0

Produtos afetados

fedoraproject:fedoraxscreensaver_project:xscreensaver

Fraquezas (CWE)

CWE-120

Referencias

http://www.openwall.com/lists/oss-security/2021/06/11/1(cve@mitre.org)

http://www.openwall.com/lists/oss-security/2021/07/06/2(cve@mitre.org)

https://github.com/QubesOS/qubes-issues/issues/6595(cve@mitre.org)

https://github.com/QubesOS/qubes-secpack/blob/master/QSBs/qsb-068-2021.txt(cve@mitre.org)

https://github.com/QubesOS/qubes-xscreensaver/blob/master/0001-Fix-updating-outputs-info.patch(cve@mitre.org)

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TC4QB7TRS4GS7LDXQQ4PC6J3LVFJYISV/(cve@mitre.org)

https://www.openwall.com/lists/oss-security/2021/06/05/1(cve@mitre.org)

http://www.openwall.com/lists/oss-security/2021/06/11/1(af854a3a-2127-422b-91ae-364da2661108)

http://www.openwall.com/lists/oss-security/2021/07/06/2(af854a3a-2127-422b-91ae-364da2661108)

https://github.com/QubesOS/qubes-issues/issues/6595(af854a3a-2127-422b-91ae-364da2661108)

https://github.com/QubesOS/qubes-secpack/blob/master/QSBs/qsb-068-2021.txt(af854a3a-2127-422b-91ae-364da2661108)

https://github.com/QubesOS/qubes-xscreensaver/blob/master/0001-Fix-updating-outputs-info.patch(af854a3a-2127-422b-91ae-364da2661108)

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TC4QB7TRS4GS7LDXQQ4PC6J3LVFJYISV/(af854a3a-2127-422b-91ae-364da2661108)

https://www.openwall.com/lists/oss-security/2021/06/05/1(af854a3a-2127-422b-91ae-364da2661108)

Correlacoes IOC

Sem correlacoes registradas

This product uses data from the NVD API but is not endorsed or certified by the NVD.