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-220979r877392_rule

Vulnerability ID: V-220979

Group Title: SRG-OS-000324-GPOS-00125

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.