The NSX-T Tier-0 Gateway must be configured to use a unique key for each autonomous system (AS) with which it peers.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-251752	T0RT-3X-000055	SV-251752r856693_rule		Medium

Description
If the same keys are used between eBGP neighbors, the chance of a hacker compromising any of the BGP sessions increases. It is possible that a malicious user exists in one autonomous system who would know the key used for the eBGP session. This user would then be able to hijack BGP sessions with other trusted neighbors.

STIG	Date
VMware NSX-T Tier-0 Gateway RTR Security Technical Implementation Guide	2022-09-01

Details

Check Text ( C-55189r810138_chk )
If the Tier-0 Gateway is not using BGP, this is Not Applicable. Since the NSX-T Tier-0 Gateway does not reveal the current password, interview the router administrator to determine if unique keys are being used. If unique keys are not being used for each AS, this is a finding.

Fix Text (F-55143r810139_fix)
To set authentication for BGP neighbors do the following: From the NSX-T Manager web interface, go to Networking >> Tier-0 Gateways, and expand the target Tier-0 gateway. Expand BGP. Next to BGP Neighbors, click on the number present to open the dialog, and then select "Edit" on the target BGP Neighbor. Under Timers & Password, enter a password up to 20 characters that is different from other autonomous systems, and then click "Save".

Fix Text (F-55143r810139_fix)

To set authentication for BGP neighbors do the following:

From the NSX-T Manager web interface, go to Networking >> Tier-0 Gateways, and expand the target Tier-0 gateway.

Expand BGP. Next to BGP Neighbors, click on the number present to open the dialog, and then select "Edit" on the target BGP Neighbor.

Under Timers & Password, enter a password up to 20 characters that is different from other autonomous systems, and then click "Save".