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User control of proxy settings must be disabled.


Overview

Finding ID Version Rule ID IA Controls Severity
V-235719 EDGE-00-000001 SV-235719r836355_rule Medium
Description
This action configures the proxy settings for Microsoft Edge. If this policy is enabled, Microsoft Edge ignores all proxy-related options specified from the command line. If this policy is not configured, users can choose their own proxy settings. This policy overrides the following individual policies: - ProxyMode - ProxyPacUrl - ProxyServer - ProxyBypassList Setting the ProxySettings policy accepts the following fields: - ProxyMode, which allows for the proxy server used by Microsoft Edge to be specified and prevents users from changing proxy settings - ProxyPacUrl, a URL to a proxy .pac file - ProxyServer, a URL for the proxy server - ProxyBypassList, a list of proxy hosts that Microsoft Edge bypasses For ProxyMode, the following values have the noted impact: - direct, a proxy is never used and all other fields are ignored. - system, the system's proxy is used and all other fields are ignored. - auto_detect, all other fields are ignored. - fixed_server, the ProxyServer and ProxyBypassList fields are used. - pac_script, the ProxyPacUrl and ProxyBypassList fields are used.
STIG Date
Microsoft Edge Security Technical Implementation Guide 2022-06-17

Details

Check Text ( C-38938r832301_chk )
The policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Proxy server/Proxy Settings" must be set to one of the following options: "ProxyMode", "ProxyPacUrl", "ProxyServer", or "ProxyBypassList".

If "ProxyMode" is used, one of the following must be set: "direct", "system", "auto_detect", "fixed_server", "pac_script"

Use the Windows Registry Editor to navigate to the following key:
HKLM\SOFTWARE\Policies\Microsoft\Edge

If the REG_SZ value for "ProxySettings" is not set to one of the above selections, this is a finding.
Fix Text (F-38901r836354_fix)
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Proxy server/Proxy Settings" to "ProxyMode", "ProxyPacUrl", "ProxyServer", or "ProxyBypassList".

If "ProxyMode" is selected, one of the following must also be set: "direct", "system", "auto_detect", "fixed_server", "pac_script".