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Windows Server 2019 Modify firmware environment values user right must only be assigned to the Administrators group.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-93079 | WN19-UR-000180 | SV-103167r1_rule | Medium |
| Description |
|---|
| 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. |
| STIG | Date |
|---|---|
| Windows Server 2019 Security Technical Implementation Guide | 2019-12-12 |
Details
| Check Text ( C-92397r1_chk ) |
|---|
| 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) |
| Fix Text (F-99325r1_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 |