The system will be configured to prevent ICMP redirects from overriding OSPF generated routes.

From Windows Server 2008 R2 Member Server Security Technical Implementation Guide

Associated with: CCI-000366

SV-32355r1_rule The system will be configured to prevent ICMP redirects from overriding OSPF generated routes.

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”.

Pro Tips

Lavender hyperlinks in small type off to the right (of CSS class id, if you view the page source) point to globally unique URIs for each document and item. Copy the link location and paste anywhere you need to talk unambiguously about these things.

You can obtain data about documents and items in other formats. Simply provide an HTTP header Accept: text/turtle or Accept: application/rdf+xml.