Microsoft Windows Server 2022

Windows Server 2022 must be configured to prevent Internet Control Message Protocol (ICMP) redirects from overriding Open Shortest Path First (OSPF)-generated routes

STIG ID: WN22-CC-000050 | SRG: SRG-OS-000480-GPOS-00227 | Severity: Low | CCI: CCI-000366 | Vulnerability ID: V-254337

Description

Allowing ICMP redirect of routes can lead to traffic not being routed properly. When disabled, this forces ICMP to be routed via the shortest path first.

Check

C-254337r991589_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\Tcpip\Parameters\Value Name: EnableICMPRedirectValue Type: REG_DWORDValue: 0x00000000 (0)

Fix

F-57773r848826_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> MSS (Legacy) >> MSS: (EnableICMPRedirect) Allow ICMP redirects to override OSPF generated routes to "Disabled".This policy setting requires the installation of the MSS-Legacy custom templates included with the STIG package. "MSS-Legacy.admx" and "MSS-Legacy.adml" must be copied to the \Windows\PolicyDefinitions and \Windows\PolicyDefinitions\en-US directories respectively.