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.
References
Link | Resource |
---|---|
https://bugzilla.redhat.com/show_bug.cgi?id=1933757 | Issue Tracking Third Party Advisory |
History
No history.
MITRE Information
Status: PUBLISHED
Assigner: redhat
Published: 2021-03-15T21:17:52
Updated: 2021-03-18T14:44:25
Reserved: 2021-03-01T00:00:00
Link: CVE-2021-3418
JSON object: View
NVD Information
Status : Analyzed
Published: 2021-03-15T22:15:13.907
Modified: 2021-03-22T16:45:49.147
Link: CVE-2021-3418
JSON object: View
Redhat Information
No data.
CWE