The IIS 8.5 web server must produce log records that contain sufficient information to establish the outcome (success or failure) of IIS 8.5 web server events.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-76687	IISW-SV-000110	SV-91383r2_rule		Medium

Description
Web server logging capability is critical for accurate forensic analysis. Without sufficient and accurate information, a correct replay of the events cannot be determined. Ascertaining the success or failure of an event is important during forensic analysis. Correctly determining the outcome will add information to the overall reconstruction of the logable event. By determining the success or failure of the event correctly, analysis of the enterprise can be undertaken to determine if events tied to the event occurred in other areas within the enterprise. Without sufficient information establishing the success or failure of the logged event, investigation into the cause of event is severely hindered. The success or failure also provides a means to measure the impact of an event and help authorized personnel to determine the appropriate response. Log record content that may be necessary to satisfy the requirement of this control includes, but is not limited to, time stamps, source and destination IP addresses, user/process identifiers, event descriptions, application-specific events, success/fail indications, file names involved, access control, or flow control rules invoked.

Description

Web server logging capability is critical for accurate forensic analysis. Without sufficient and accurate information, a correct replay of the events cannot be determined. Ascertaining the success or failure of an event is important during forensic analysis. Correctly determining the outcome will add information to the overall reconstruction of the logable event. By determining the success or failure of the event correctly, analysis of the enterprise can be undertaken to determine if events tied to the event occurred in other areas within the enterprise. Without sufficient information establishing the success or failure of the logged event, investigation into the cause of event is severely hindered. The success or failure also provides a means to measure the impact of an event and help authorized personnel to determine the appropriate response. Log record content that may be necessary to satisfy the requirement of this control includes, but is not limited to, time stamps, source and destination IP addresses, user/process identifiers, event descriptions, application-specific events, success/fail indications, file names involved, access control, or flow control rules invoked.

STIG	Date
IIS 8.5 Server Security Technical Implementation Guide	2018-04-05

Details

Check Text ( C-76343r2_chk )
Access the IIS 8.5 web server IIS Manager. Click the IIS 8.5 web server name. Under "IIS", double-click the "Logging" icon. Verify the "Format:" under "Log File" is configured to "W3C". Select the "Fields" button. Under "Custom Fields", verify the following fields have been configured: Request Header >> Connection Request Header >> Warning If any of the above fields are not selected, this is a finding.

Check Text ( C-76343r2_chk )

Access the IIS 8.5 web server IIS Manager.

Click the IIS 8.5 web server name.

Under "IIS", double-click the "Logging" icon.

Verify the "Format:" under "Log File" is configured to "W3C".

Select the "Fields" button.

Under "Custom Fields", verify the following fields have been configured:

Request Header >> Connection

Request Header >> Warning

If any of the above fields are not selected, this is a finding.

Fix Text (F-83383r2_fix)
Access the IIS 8.5 web server IIS Manager. Click the IIS 8.5 web server name. Under "IIS", double-click the "Logging" icon. Verify the "Format:" under "Log File" is configured to "W3C". Select the "Fields" button. Under "Custom Fields", click the "Add Field..." button. For each field being added, give a name unique to what the field is capturing. Click on the "Source Type" drop-down list and select "Request Header". Click on the "Source" drop-down list and select "Connection". Click “OK” to add. Click on the "Source Type" drop-down list and select "Request Header". Click on the "Source" drop-down list and select "Warning". Click “OK” to add. Click on the "Source Type" drop-down list and select "Server Variable". Click “OK” to add. Click "OK". Click "Apply" under the "Actions" pane.

Fix Text (F-83383r2_fix)

Access the IIS 8.5 web server IIS Manager.

Click the IIS 8.5 web server name.

Under "IIS", double-click the "Logging" icon.

Verify the "Format:" under "Log File" is configured to "W3C".

Select the "Fields" button.

Under "Custom Fields", click the "Add Field..." button.

For each field being added, give a name unique to what the field is capturing.

Click on the "Source Type" drop-down list and select "Request Header".
Click on the "Source" drop-down list and select "Connection".
Click “OK” to add.

Click on the "Source Type" drop-down list and select "Request Header".
Click on the "Source" drop-down list and select "Warning".
Click “OK” to add.

Click on the "Source Type" drop-down list and select "Server Variable".
Click “OK” to add.

Click "OK".

Click "Apply" under the "Actions" pane.