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

From Windows Server 2012/2012 R2 Member Server Security Technical Implementation Guide

Part of IPv6 Source Routing

Associated with: CCI-000366

SV-53180r2_rule IPv6 source routing must be configured to the highest protection level.

Vulnerability discussion

Configuring the system to disable IPv6 source routing protects against spoofing.

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\Services\Tcpip6\Parameters\ Value Name: DisableIPSourceRouting Type: REG_DWORD Value: 2

Fix text

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.)

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