Check: WN11-UR-000140
Microsoft Windows 11 STIG:
WN11-UR-000140
(in versions v1 r6 through v1 r1)
Title
The "Modify firmware environment values" user right must only be assigned to the Administrators group. (Cat II impact)
Discussion
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. Accounts with the "Modify firmware environment values" user right can change hardware configuration environment variables. This could result in hardware failures or a DoS.
Check Content
Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If any groups or accounts other than the following are granted the "Modify firmware environment values" user right, this is a finding: Administrators
Fix Text
Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Modify firmware environment values" to only include the following groups or accounts: Administrators
Additional Identifiers
Rule ID: SV-253502r877392_rule
Vulnerability ID: V-253502
Group Title: SRG-OS-000324-GPOS-00125
Expert Comments
CCIs
| Number | Definition |
|---|---|
| CCI-002205 |
The information system uniquely identifies and authenticates source by organization, system, application, and/or individual for information transfer. |
| CCI-002235 |
The information system prevents non-privileged users from executing privileged functions to include disabling, circumventing, or altering implemented security safeguards/countermeasures. |