The system must be configured to disable the Internet Router Discovery Protocol (IRDP).

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-4112	WN08-SO-000044	SV-48544r1_rule		Low

Description
The Internet Router Discovery Protocol (IRDP) is used to detect and configure default gateway addresses on the computer. If a router is impersonated on a network, traffic could be routed through the compromised system.

STIG	Date
Windows 8/8.1 Security Technical Implementation Guide	2017-02-27

Details

Check Text ( C-44850r1_chk )
Analyze the system using the Security Configuration and Analysis snap-in. (See "Performing Analysis with the Security Configuration and Analysis Snap-in" in the STIG Overview document.) Expand the Security Configuration and Analysis tree view. Navigate to Local Policies -> Security Options. (See "Updating the Windows Security Options File" in the STIG Overview document if MSS settings are not visible in the system's policy tools.) If the value for "MSS: (PerformRouterDiscovery) Allow IRDP to detect and configure Default Gateway addresses (could lead to DoS)" is not set to "Disabled", this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Subkey: \System\CurrentControlSet\Services\Tcpip\Parameters\ Value Name: PerformRouterDiscovery Value Type: REG_DWORD Value: 0

Check Text ( C-44850r1_chk )

Analyze the system using the Security Configuration and Analysis snap-in. (See "Performing Analysis with the Security Configuration and Analysis Snap-in" in the STIG Overview document.)
Expand the Security Configuration and Analysis tree view.
Navigate to Local Policies -> Security Options.

(See "Updating the Windows Security Options File" in the STIG Overview document if MSS settings are not visible in the system's policy tools.)

If the value for "MSS: (PerformRouterDiscovery) Allow IRDP to detect and configure Default Gateway addresses (could lead to DoS)" is not set to "Disabled", this is a finding.

Registry Hive: HKEY_LOCAL_MACHINE
Subkey: \System\CurrentControlSet\Services\Tcpip\Parameters\

Value Name: PerformRouterDiscovery

Value Type: REG_DWORD
Value: 0

Fix Text (F-41261r1_fix)
Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> "MSS: (PerformRouterDiscovery) Allow IRDP to detect and configure Default Gateway addresses (could lead to DoS)" to "Disabled".