CVE-2021-3418

MEDIUM

6.4

Description

If certificates that signed grub are installed into db, grub can be booted directly. It will then boot any kernel without signature validation. The booted kernel will think it was booted in secureboot mode and will implement lockdown, yet it could have been tampered. This flaw is a reintroduction of CVE-2020-15705 and only affects grub2 versions prior to 2.06 and upstream and distributions using the shim_lock mechanism.

Details CVE

Score CVSS v3.16.4

SeveriteMEDIUM

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

Vecteur d'attaqueLOCAL

ComplexiteHIGH

Privileges requisHIGH

Interaction utilisateurNONE

Publie3/15/2021

Derniere modification11/21/2024

Sourcenvd

Observations honeypot0

Produits affectes

gnu:grub2

Faiblesses (CWE)

CWE-281

References

https://bugzilla.redhat.com/show_bug.cgi?id=1933757(secalert@redhat.com)

https://bugzilla.redhat.com/show_bug.cgi?id=1933757(af854a3a-2127-422b-91ae-364da2661108)

Correlations IOC

Aucune correlation enregistree

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