Check: O365-CO-000024
Microsoft Office 365 ProPlus STIG:
O365-CO-000024
(in versions v2 r11 through v1 r1)
Title
File Download Restriction must be enabled in all Office programs. (Cat II impact)
Discussion
Disabling this setting allows websites to present file download prompts via code without the user specifically initiating the download. User preferences may also allow the download to occur without prompting or interaction with the user. Even if Internet Explorer prompts the user to accept the download, some websites abuse this functionality. Malicious websites may continually prompt users to download a file or present confusing dialog boxes to trick users into downloading or running a file. If the download occurs and it contains malicious code, the code could become active on user computers or the network.
Check Content
Verify the policy value for Computer Configuration >> Administrative Templates >> Microsoft Office 2016 (Machine) >> Security Settings >> IE Security >> Restrict File Download 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_restrict_filedownload 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 >> Restrict File Download to "Enabled" and select the check boxes for all installed Office programs.
Additional Identifiers
Rule ID: SV-223306r879573_rule
Vulnerability ID: V-223306
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 |