STIGQter: STIG Summary: Microsoft IIS 10.0 Server Security Technical Implementation Guide Version: 2 Release: 2 Benchmark Date: 23 Apr 2021:

Unspecified file extensions on a production IIS 10.0 web server must be removed.

DISA Rule

SV-218824r561041_rule

Vulnerability Number

V-218824

Group Title

SRG-APP-000516-WSR-000174

Rule Version

IIST-SV-000158

Severity

CAT II

CCI(s)

• CCI-000366 - The organization implements the security configuration settings.

Weight

10

Fix Recommendation

Open the IIS 10.0 Manager.

Click the IIS 10.0 web server name.

Double-click the "ISAPI and CGI restrictions" icon.

Click "Edit Feature Settings".

Remove the check from the "Allow unspecified CGI modules" and the "Allow unspecified ISAPI modules" check boxes.

Click "OK".

Check Contents

Open the IIS 10.0 Manager.

Click the IIS 10.0 web server name.

Double-click the "ISAPI and CGI restrictions" icon.

Click “Edit Feature Settings".

Verify the "Allow unspecified CGI modules" and the "Allow unspecified ISAPI modules" check boxes are NOT checked.

If either or both of the "Allow unspecified CGI modules" and the "Allow unspecified ISAPI modules" check boxes are checked, this is a finding.

Vulnerability Number

V-218824

Documentable

False

Rule Version

IIST-SV-000158

Severity Override Guidance

Open the IIS 10.0 Manager.

Click the IIS 10.0 web server name.

Double-click the "ISAPI and CGI restrictions" icon.

Click “Edit Feature Settings".

Verify the "Allow unspecified CGI modules" and the "Allow unspecified ISAPI modules" check boxes are NOT checked.

If either or both of the "Allow unspecified CGI modules" and the "Allow unspecified ISAPI modules" check boxes are checked, this is a finding.

Check Content Reference

M

Target Key

4052

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