The IIS 10.0 website must produce log records containing sufficient information to establish the identity of any user/subject or process associated with an event.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-218742	IIST-SI-000210	SV-218742r558649_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. Determining user accounts, processes running on behalf of the user, and running process identifiers also enable a better understanding of the overall event. User tool identification is also helpful to determine if events are related to overall user access or specific client tools. Log record content that may be necessary to satisfy the requirement of this control includes: time stamps, source and destination addresses, user/process identifiers, event descriptions, success/fail indications, file names involved, and 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. Determining user accounts, processes running on behalf of the user, and running process identifiers also enable a better understanding of the overall event. User tool identification is also helpful to determine if events are related to overall user access or specific client tools. Log record content that may be necessary to satisfy the requirement of this control includes: time stamps, source and destination addresses, user/process identifiers, event descriptions, success/fail indications, file names involved, and access control or flow control rules invoked.

STIG	Date
Microsoft IIS 10.0 Site Security Technical Implementation Guide	2021-12-28

Details

Check Text ( C-20215r311124_chk )
Follow the procedures below for each site hosted on the IIS 10.0 web server: Access the IIS 10.0 web server IIS 10.0 Manager. Under "IIS", double-click the "Logging" icon. Verify the "Format:" under "Log File" is configured to "W3C". Select "Fields". Under "Standard Fields", verify "User Agent", "User Name", and "Referrer" are selected. Under "Custom Fields", verify the following fields have been configured: Request Header >> Authorization Response Header >> Content-Type If any of the above fields are not selected, this is a finding.

Check Text ( C-20215r311124_chk )

Follow the procedures below for each site hosted on the IIS 10.0 web server:

Access the IIS 10.0 web server IIS 10.0 Manager.

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

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

Select "Fields".

Under "Standard Fields", verify "User Agent", "User Name", and "Referrer" are selected.

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

Request Header >> Authorization

Response Header >> Content-Type

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

Fix Text (F-20213r311125_fix)
Follow the procedures below for each site hosted on the IIS 10.0 web server: Access the IIS 10.0 web server IIS 10.0 Manager. Select the website being reviewed. Under "IIS", double-click the "Logging" icon. Configure the "Format:" under "Log File" to "W3C". Select "Fields". Under "Standard Fields", select "User Agent", "User Name", and "Referrer". Under "Custom Fields", select the following fields: Request Header >> Authorization Response Header >> Content-Type Click "OK". Select "Apply" from the "Actions" pane.

Fix Text (F-20213r311125_fix)

Follow the procedures below for each site hosted on the IIS 10.0 web server:

Access the IIS 10.0 web server IIS 10.0 Manager.

Select the website being reviewed.

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

Configure the "Format:" under "Log File" to "W3C".

Select "Fields".

Under "Standard Fields", select "User Agent", "User Name", and "Referrer".

Under "Custom Fields", select the following fields:

Request Header >> Authorization

Response Header >> Content-Type

Click "OK".

Select "Apply" from the "Actions" pane.