The HP FlexFabric Switch must not redistribute static routes to alternate gateway service provider into an Exterior Gateway Protocol or Interior Gateway Protocol to the NIPRNet or to other Autonomous System.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-66099	HFFS-RT-000002	SV-80589r1_rule		Medium

Description
If the static routes to the alternate gateway are being redistributed into an Exterior Gateway Protocol or Interior Gateway Protocol to a NIPRNet gateway, this could make traffic on NIPRNet flow to that particular router and not to the Internet Access Point routers. This could not only wreak havoc with traffic flows on NIPRNet, but it could overwhelm the connection from the router to the NIPRNet gateway(s) and also cause traffic destined for outside of NIPRNet to bypass the defenses of the Internet Access Points.

Description

If the static routes to the alternate gateway are being redistributed into an Exterior Gateway Protocol or Interior Gateway Protocol to a NIPRNet gateway, this could make traffic on NIPRNet flow to that particular router and not to the Internet Access Point routers. This could not only wreak havoc with traffic flows on NIPRNet, but it could overwhelm the connection from the router to the NIPRNet gateway(s) and also cause traffic destined for outside of NIPRNet to bypass the defenses of the Internet Access Points.

STIG	Date
HP FlexFabric Switch RTR Security Technical Implementation Guide	2020-06-03

Details

Check Text ( C-66745r1_chk )
Review the External/internal gateway protocol database on the HP FlexFabric Switch to ensure no static routes are being redistributed via these protocols. If there are static routes being re-distributed, this is a finding. [HP] display ospf lsdb OSPF Process 1 with HP FlexFabric Switch ID 5.9.2.0 Link State Database Area: 0.0.0.1 Type LinkState ID AdvHP FlexFabric Switch Age Len Sequence Metric HP FlexFabric Switch 1.1.1.1 1.1.1.1 1644 48 80000155 0 HP FlexFabric Switch 5.9.2.0 5.9.2.0 233 48 8000013E 0 HP FlexFabric Switch 2.2.2.2 2.2.2.2 294 72 8000014F 0 AS External Database Type LinkState ID AdvHP FlexFabric Switch Age Len Sequence Metric External 16.0.0.0 5.9.2.0 233 36 80000001 1 External 15.252.0.0 5.9.2.0 233 36 80000001 1 Note: In the example above we see two external entries with the advertising HP FlexFabric Switch as the HP FlexFabric Switch. This exists when the HP FlexFabric Switch is configured to redistribute static route.

Check Text ( C-66745r1_chk )

Review the External/internal gateway protocol database on the HP FlexFabric Switch to ensure no static routes are being redistributed via these protocols.

If there are static routes being re-distributed, this is a finding.

[HP] display ospf lsdb

OSPF Process 1 with HP FlexFabric Switch ID 5.9.2.0
Link State Database

Area: 0.0.0.1
Type LinkState ID AdvHP FlexFabric Switch Age Len Sequence Metric
HP FlexFabric Switch 1.1.1.1 1.1.1.1 1644 48 80000155 0
HP FlexFabric Switch 5.9.2.0 5.9.2.0 233 48 8000013E 0
HP FlexFabric Switch 2.2.2.2 2.2.2.2 294 72 8000014F 0

AS External Database
Type LinkState ID AdvHP FlexFabric Switch Age Len Sequence Metric
External 16.0.0.0 5.9.2.0 233 36 80000001 1
External 15.252.0.0 5.9.2.0 233 36 80000001 1

Note: In the example above we see two external entries with the advertising HP FlexFabric Switch as the HP FlexFabric Switch. This exists when the HP FlexFabric Switch is configured to redistribute static route.

Fix Text (F-72175r1_fix)
By default the HP FlexFabric switches do not redistribute static routes via External/Internak gateway protocols. If Static routes redistribution has been configure, use the command bellow to disable it. [HP] ospf 1 [HP-ospf-1] undo import-route static