Insufficient input validation in MdeModulePkg in EDKII may allow an unauthenticated user to potentially enable escalation of privilege, denial of service and/or information disclosure via physical access.
https://edk2-docs.gitbook.io/security-advisory/bootguard-toctou-vulnerability
Source: MITRE
Published: 2021-07-14
Updated: 2021-07-20
Type: CWE-20
Base Score: 4.6
Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P
Impact Score: 6.4
Exploitability Score: 3.9
Severity: MEDIUM
Base Score: 6.8
Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 0.9
Severity: MEDIUM