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.

CVE Details

CVSS v3.1 Score6.4

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Attack VectorLOCAL

ComplexityHIGH

Privileges RequiredHIGH

User InteractionNONE

Published3/15/2021

Last Modified11/21/2024

Sourcenvd

Honeypot Sightings0

Affected Products

gnu:grub2

Weaknesses (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)

IOC Correlations

No correlations recorded

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