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IPv6 source routing must be configured to the highest protection level.


Overview

Finding ID Version Rule ID IA Controls Severity
V-225479 WN12-SO-000037 SV-225479r569185_rule Low
Description
Configuring the system to disable IPv6 source routing protects against spoofing.
STIG Date
Microsoft Windows Server 2012/2012 R2 Member Server Security Technical Implementation Guide 2022-03-01

Details

Check Text ( C-27178r471779_chk )
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\Services\Tcpip6\Parameters\

Value Name: DisableIPSourceRouting

Type: REG_DWORD
Value: 2
Fix Text (F-27166r471780_fix)
Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> "MSS: (DisableIPSourceRouting IPv6) IP source routing protection level (protects against packet spoofing)" to "Highest protection, source routing is completely disabled".

(See "Updating the Windows Security Options File" in the STIG Overview document if MSS settings are not visible in the system's policy tools.)