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Internet Explorer Processes for Restrict File Download must be enforced (Explorer).


Overview

Finding ID Version Rule ID IA Controls Severity
V-46779 DTBI635-IE11 SV-59645r1_rule ECSC-1 Medium
Description
In certain circumstances, websites can initiate file download prompts without interaction from users. This technique can allow websites to put unauthorized files on users' hard drives if they click the wrong button and accept the download. If you configure the Restrict File Download\Internet Explorer Processes policy setting to "Enabled", file download prompts that are not user-initiated are blocked for Internet Explorer processes. If you configure this policy setting as "Disabled", prompting will occur for file downloads that are not user-initiated for Internet Explorer processes. Note: This setting is configured as "Enabled" in all environments specified in this guide to help prevent attackers from placing arbitrary code on users' computers.
STIG Date
Microsoft Internet Explorer 11 Security Technical Implementation Guide 2018-06-08

Details

Check Text ( C-49877r2_chk )
The policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Internet Explorer -> Security Features -> Restrict File Download -> 'Internet Explorer Processes' must be 'Enabled'. Procedure: Use the Windows Registry Editor to navigate to the following key: HKLM\Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_RESTRICT_FILEDOWNLOAD Criteria: If the value "explorer.exe" is REG_SZ = 1, this is not a finding.
Fix Text (F-50529r1_fix)
Set the policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Internet Explorer -> Security Features -> Restrict File Download -> 'Internet Explorer Processes' to 'Enabled'.