Title

Accessing data sources across domains must be disallowed (Restricted Sites zone). (Cat II impact)

Discussion

The ability to access data zones across domains could cause the user to unknowingly access content hosted on an unauthorized server. This policy setting allows you to manage whether Internet Explorer can access data from another security zone using the Microsoft XML Parser (MSXML) or ActiveX Data Objects (ADO).

Check Content

The policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Internet Explorer -> Internet Control Panel -> Security Page -> Restricted Sites Zone -> 'Access data sources across domains' must be 'Enabled', and 'Disable' selected from the drop-down box. Procedure: Use the Windows Registry Editor to navigate to the following key: HKLM\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\4 Criteria: If the value "1406" is REG_DWORD = 3, this is not a finding.

Fix Text

Set the policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Internet Explorer -> Internet Control Panel -> Security Page -> Restricted Sites Zone -> 'Access data sources across domains' to 'Enabled', and select 'Disable' from the drop-down box.

Additional Identifiers

Rule ID: SV-223062r879534_rule

Vulnerability ID: V-223062

Group Title: SRG-APP-000039

Expert Comments

CCIs tied to check.

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