CVE-2021-3418
Published Mar 15, 2021
Last updated 4 years ago
Overview
- 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.
- Source
- secalert@redhat.com
- NVD status
- Analyzed
Social media
- Hype score
- Not currently trending
Risk scores
CVSS 3.1
- Type
- Primary
- Base score
- 6.4
- Impact score
- 5.9
- Exploitability score
- 0.5
- Vector string
- CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
- Severity
- MEDIUM
CVSS 2.0
- Type
- Primary
- Base score
- 4.4
- Impact score
- 6.4
- Exploitability score
- 3.4
- Vector string
- AV:L/AC:M/Au:N/C:P/I:P/A:P
Weaknesses
- secalert@redhat.com
- CWE-281
Configurations
[
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:gnu:grub2:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "01F8D62F-70BB-4718-A095-D68540C17EEA",
"versionEndExcluding": "2.06"
}
],
"operator": "OR"
}
]
}
]