Windows Server 2016 must be configured to use FIPS-compliant algorithms for encryption, hashing, and signing.

From Windows Server 2016 Security Technical Implementation Guide

SV-88365r1_rule Windows Server 2016 must be configured to use FIPS-compliant algorithms for encryption, hashing, and signing.

Vulnerability discussion

This setting ensures the system uses algorithms that are FIPS-compliant for encryption, hashing, and signing. FIPS-compliant algorithms meet specific standards established by the U.S. Government and must be the algorithms used for all OS encryption functions.Satisfies: SRG-OS-000033-GPOS-00014, SRG-OS-000478-GPOS-00223

Check content

If the following registry value does not exist or is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Control\Lsa\FIPSAlgorithmPolicy\ Value Name: Enabled Value Type: REG_DWORD Value: 0x00000001 (1) Clients with this setting enabled will not be able to communicate via digitally encrypted or signed protocols with servers that do not support these algorithms. Both the browser and web server must be configured to use TLS; otherwise. the browser will not be able to connect to a secure site.

Fix text

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "System cryptography: Use FIPS compliant algorithms for encryption, hashing, and signing" to "Enabled".

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