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WN22-UR-000180 Windows Server 2022 modify firmware environment values user right must only be assigned to the Administrators group.

DISA STIG library V2R11
All changes in this version
first version loaded CAT II

Maps to AC-6(10) via CCI-002235

Title

Windows Server 2022 modify firmware environment values user right must only be assigned to the Administrators group.

Control

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 accounts or groups other than the following are granted the "Modify firmware environment values" user right, this is a finding: - Administrators For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If any SIDs other than the following are granted the "SeSystemEnvironmentPrivilege" user right, this is a finding: S-1-5-32-544 (Administrators)

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 denial of service.

Related controls

CCI-002235

Fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> Modify firmware environment values to include only the following accounts or groups: - Administrators