CVE-2021-3418

State: Published
Severity: Not scored
Published: Mar 15, 2021
Updated: Aug 3, 2024
Reserved: Mar 1, 2021

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.

Scores

The record has no CVSS score.

Weaknesses

CWE-281

Affected Products

Product	Versions
grub2n/a	Fixed in 2.06Affected

References

https://bugzilla.redhat.com/show_bug.cgi?id=1933757

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