JUNI-RT-000040 - The Juniper router must be configured to use encryption for routing protocol authentication - IS-IS

Information

A rogue router could send a fictitious routing update to convince a site's perimeter router to send traffic to an incorrect or even a rogue destination. This diverted traffic could be analyzed to learn confidential information about the site's network or used to disrupt the network's ability to communicate with other networks. This is known as a 'traffic attraction attack' and is prevented by configuring neighbor router authentication for routing updates. However, using clear-text authentication provides little benefit since an attacker can intercept traffic and view the authentication key. This would allow the attacker to use the authentication key in an attack.

This requirement applies to all IPv4 and IPv6 protocols that are used to exchange routing or packet forwarding information; this includes all Interior Gateway Protocols (such as OSPF, EIGRP, and IS-IS) and Exterior Gateway Protocols (such as BGP), MPLS-related protocols (such as LDP), and multicast-related protocols.

Solution

Configure all routing protocol authentications to encrypt the authentication key.

OSPF Example:

[edit protocols ospf area 0.0.0.0]
set interface ge-0/0/0 authentication md5 1 key xxxxxxxxxxxx
set interface ge-0/1/0 authentication md5 1 key xxxxxxxxxxxx
set interface ge-0/2/0 authentication md5 1 key xxxxxxxxxxxx

IS-IS Example:

[edit security authentication-key-chains]
set key-chain ISIS_KEY key 1 options isis-enhanced
set key-chain ISIS_KEY key 2 options isis-enhanced
set key-chain ISIS_KEY key 3 options isis-enhanced
set key-chain ISIS_KEY key 1 start-time 2018-05-01.12:00 algorithm hmac-sha-1 secret xxxxxxxxxxxxx
set key-chain ISIS_KEY key 2 start-time 2018-09-01.12:00 algorithm hmac-sha-1 secret xxxxxxxxxxxxx
set key-chain ISIS_KEY key 3 start-time 2019-01-01.12:00 algorithm hmac-sha-1 secret xxxxxxxxxxxxx

[edit protocols]
set isis level 1 authentication-key-chain ISIS_KEY
set isis interface ge-0/0/0 level 1 hello-authentication-key-chain ISIS_KEY
set isis interface ge-0/0/0 level 2 hello-authentication-key-chain ISIS_KEY

BGP Example:

[edit security authentication-key-chains]
set key-chain BGP_KEY key 1 start-time 2018-05-01.12:00 secret xxxxxxxxxxxxx
set key-chain BGP_KEY key 2 start-time 2018-09-01.12:00 secret xxxxxxxxxxxxx
set key-chain BGP_KEY key 3 start-time 2019-01-01.12:00 secret xxxxxxxxxxxxx

[edit protocols bgp group AS_5]
set neighbor 11.1.25.5 authentication-algorithm hmac-sha-1-96
set neighbor 11.1.25.5 authentication-key-chain BGP_KEY
set neighbor 11.1.1.1 authentication-algorithm hmac-sha-1-96
set neighbor 11.1.1.1 authentication-key-chain BGP_KEY

Item Details

Audit Name: DISA STIG Juniper Router RTR v3r1

Category: IDENTIFICATION AND AUTHENTICATION

Plugin: Juniper

Control ID: 89b75b173f1b03e6df8d359d2c32f568f204e4a9af8512dde7cf317f5dc8fda1

Detections

Analytics

JUNI-RT-000040 - The Juniper router must be configured to use encryption for routing protocol authentication - IS-IS

Information

Solution

See Also

Item Details