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Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2021-3418

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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 20.4%
CVSS Severity
CVSS v3 Score 6.4
CVSS v2 Score 4.4
Products affected by CVE-2021-3418
  • Gnu » Grub2 » Version: N/A
    cpe:2.3:a:gnu:grub2:-
  • Gnu » Grub2 » Version: 1.98
    cpe:2.3:a:gnu:grub2:1.98
  • Gnu » Grub2 » Version: 1.99
    cpe:2.3:a:gnu:grub2:1.99
  • Gnu » Grub2 » Version: 2.00
    cpe:2.3:a:gnu:grub2:2.00
  • Gnu » Grub2 » Version: 2.01
    cpe:2.3:a:gnu:grub2:2.01
  • Gnu » Grub2 » Version: 2.02
    cpe:2.3:a:gnu:grub2:2.02
  • Gnu » Grub2 » Version: 2.04
    cpe:2.3:a:gnu:grub2:2.04


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