STIGQter: STIG Summary: Microsoft Windows Server 2016 Security Technical Implementation Guide Version: 2 Release: 2 Benchmark Date: 04 May 2021:

The Impersonate a client after authentication user right must only be assigned to Administrators, Service, Local Service, and Network Service.

DISA Rule

SV-225082r569186_rule

Vulnerability Number

V-225082

Group Title

SRG-OS-000324-GPOS-00125

Rule Version

WN16-UR-000220

Severity

CAT II

CCI(s)

• CCI-002235 - The information system prevents non-privileged users from executing privileged functions to include disabling, circumventing, or altering implemented security safeguards/countermeasures.

Weight

10

Fix Recommendation

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Impersonate a client after authentication" to include only the following accounts or groups:

- Administrators
- Service
- Local Service
- Network Service

Check Contents

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 "Impersonate a client after authentication" user right, this is a finding.

- Administrators
- Service
- Local Service
- Network Service

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 "SeImpersonatePrivilege" user right, this is a finding.

S-1-5-32-544 (Administrators)
S-1-5-6 (Service)
S-1-5-19 (Local Service)
S-1-5-20 (Network Service)

If an application requires this user right, this would not be a finding.

Vendor documentation must support the requirement for having the user right.

The requirement must be documented with the ISSO.

The application account must meet requirements for application account passwords, such as length (WN16-00-000060) and required frequency of changes (WN16-00-000070).

Vulnerability Number

V-225082

Documentable

False

Rule Version

WN16-UR-000220

Severity Override Guidance

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 "Impersonate a client after authentication" user right, this is a finding.

- Administrators
- Service
- Local Service
- Network Service

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 "SeImpersonatePrivilege" user right, this is a finding.

S-1-5-32-544 (Administrators)
S-1-5-6 (Service)
S-1-5-19 (Local Service)
S-1-5-20 (Network Service)

If an application requires this user right, this would not be a finding.

Vendor documentation must support the requirement for having the user right.

The requirement must be documented with the ISSO.

The application account must meet requirements for application account passwords, such as length (WN16-00-000060) and required frequency of changes (WN16-00-000070).

Check Content Reference

M

Target Key

4205

Comments