Title

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. (Cat II impact)

Discussion

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.

Check Content

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

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.

Additional Identifiers

Rule ID: SV-218742r879568_rule

Vulnerability ID: V-218742

Group Title: SRG-APP-000100-WSR-000064

Expert Comments

CCIs tied to check.

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