The system is configured to redirect ICMP.

From Windows 2008 Member Server Security Technical Implementation Guide

Part of Disable ICMP Redirect

Associated with: CCI-000366

SV-29364r1_rule The system is configured to redirect ICMP.

Vulnerability discussion

When disabled, forces ICMP to be routed via shortest path first.

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: (EnableICMPRedirect) Allow ICMP redirects to override OSPF generated routes” is not set to “Disabled”, then this is a finding. The policy referenced configures the following registry value: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \System\CurrentControlSet\Services\Tcpip\Parameters\ Value Name: EnableICMPRedirect Value Type: REG_DWORD Value: 0

Fix text

Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> “MSS: (EnableICMPRedirect) Allow ICMP redirects to override OSPF generated routes” to “Disabled”.

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