Title

IPv6 source routing must be configured to highest protection. (Cat III impact)

Discussion

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

Check Content

Analyze the system using the Security Configuration and Analysis snap-in. Expand the Security Configuration and Analysis tree view. Navigate to Local Policies >> Security Options. If the value for "MSS: (DisableIPSourceRouting IPv6) IP source routing protection level (protects against packet spoofing)" is not set to "Highest protection, source routing is completely disabled", this is a finding. The policy referenced configures the following registry value: 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".

Additional Identifiers

Rule ID: SV-25278r2_rule

Vulnerability ID: V-21955

Group Title: IPv6 Source Routing

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.