Check: O365-CO-000026
Microsoft Office 365 ProPlus STIG:
O365-CO-000026
(in versions v2 r12 through v1 r2)
Title
Scripted Windows Security restrictions must be enabled in all Office programs. (Cat II impact)
Discussion
Malicious websites often try to confuse or trick users into giving a site permission to perform an action allowing the site to take control of the users' computers in some manner. Disabling or not configuring this setting allows unknown websites to: - Create browser windows appearing to be from the local operating system. - Draw active windows displaying outside of the viewable areas of the screen capturing keyboard input. - Overlay parent windows with their own browser windows to hide important system information, choices, or prompts.
Check Content
Verify the policy value for Computer Configuration >> Administrative Templates >> Microsoft Office 2016 (Machine) >> Security Settings >> IE Security >> Scripted Window Security Restrictions is set to "Enabled" and the check box is selected for every installed Office program. Use the Windows Registry Editor to navigate to the following key: HKLM\Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_WINDOW_RESTRICTIONS If the value for all installed programs is REG_DWORD = 1, this is not a finding.
Fix Text
Set the policy value for Computer Configuration >> Administrative Templates >> Microsoft Office 2016 (Machine) >> Security Settings >> IE Security >>Scripted Window Security Restrictions to "Enabled" and select the check boxes for all installed Office programs.
Additional Identifiers
Rule ID: SV-223308r879573_rule
Vulnerability ID: V-223308
Group Title: SRG-APP-000112
Expert Comments
CCIs
Number | Definition |
---|---|
CCI-001695 |
The information system prevents the execution of organization-defined unacceptable mobile code. |
Controls
Number | Title |
---|---|
SC-18 (3) |
Prevent Downloading / Execution |