UCF STIG Viewer Logo

Cookies exchanged between the IIS 10.0 website and the client must have cookie properties set to prohibit client-side scripts from reading the cookie data.


Overview

Finding ID Version Rule ID IA Controls Severity
V-218770 IIST-SI-000246 SV-218770r558649_rule Medium
Description
A cookie can be read by client-side scripts easily if cookie properties are not set properly. By allowing cookies to be read by the client-side scripts, information such as session identifiers could be compromised and used by an attacker who intercepts the cookie. Setting cookie properties (i.e., HttpOnly property) to disallow client-side scripts from reading cookies better protects the information inside the cookie. Satisfies: SRG-APP-000439-WSR-000154, SRG-APP-000439-SSR-000155, SRG-APP-000439-WSR-000153
STIG Date
Microsoft IIS 10.0 Site Security Technical Implementation Guide 2022-06-23

Details

Check Text ( C-20243r311208_chk )
Note: If the server being reviewed is a public IIS 10.0 web server, this is Not Applicable.
Note: If SSL is installed on load balancer/proxy server through which traffic is routed to the IIS 10.0 server, and the IIS 10.0 server receives traffic from the load balancer/proxy server, the SSL requirement must be met on the load balancer/proxy server.

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

Access the IIS 10.0 Manager.
Under the "Management" section, double-click the "Configuration Editor" icon.
From the "Section:" drop-down list, select "system.web/httpCookies".
Verify the "require SSL" is set to "True".

From the "Section:" drop-down list, select "system.web/sessionState".
Verify the "compressionEnabled" is set to "False".

If both the "system.web/httpCookies:require SSL" is set to "True" and the "system.web/sessionState:compressionEnabled" is set to "False", this is not a finding.
Fix Text (F-20241r311209_fix)
Note: If the server being reviewed is a public IIS 10.0 web server, this is Not Applicable.

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

Access the IIS 10.0 Manager.
Under "Management" section, double-click the "Configuration Editor" icon.
From the "Section:" drop-down list, select "system.web/httpCookies".
Set the "require SSL" to "True".

From the "Section:" drop-down list, select "system.web/sessionState".
Set the "compressionEnabled" to "False".

Select "Apply" from the "Actions" pane.