Edge must be configured to allow only TLS.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-235759	EDGE-00-000046	SV-235759r626523_rule		High

Description
Sets the minimum supported version of SSL. If this policy is not configured, Microsoft Edge uses a default minimum version, TLS 1.0. If this policy is enabled, the minimum version can be set to one of the following values: "TLSv1", "TLSv1.1" or "TLSv1.2". When set, Microsoft Edge will not use any version of SSL/TLS lower than the specified version. Any unrecognized value is ignored. Policy options mapping: - TLSv1 (tls1) = TLS 1.0 - TLSv1.1 (tls1.1) = TLS 1.1 - TLSv1.2 (tls1.2) = TLS 1.2 NIST SP 800-52 specifies the preferred configurations for government systems.

Description

Sets the minimum supported version of SSL. If this policy is not configured, Microsoft Edge uses a default minimum version, TLS 1.0. If this policy is enabled, the minimum version can be set to one of the following values: "TLSv1", "TLSv1.1" or "TLSv1.2". When set, Microsoft Edge will not use any version of SSL/TLS lower than the specified version. Any unrecognized value is ignored. Policy options mapping: - TLSv1 (tls1) = TLS 1.0 - TLSv1.1 (tls1.1) = TLS 1.1 - TLSv1.2 (tls1.2) = TLS 1.2 NIST SP 800-52 specifies the preferred configurations for government systems.

STIG	Date
Microsoft Edge Security Technical Implementation Guide	2021-02-16

Details

Check Text ( C-38978r626473_chk )
The policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Minimum TLS version enabled" must be set to "TLS 1.2". Use the Windows Registry Editor to navigate to the following key: HKLM\SOFTWARE\Policies\Microsoft\Edge If the value for SSLVersionMin is not set to "REG_SZ = tls1.2", this is a finding.

Fix Text (F-38941r626474_fix)
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Minimum TLS version enabled" to "TLS 1.2".