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V-273622

CAT II (Medium)

The RUCKUS ICX BGP router must be configured to use a unique key for each autonomous system (AS) that it peers with.

Rule ID

SV-273622r1110931_rule

STIG

RUCKUS ICX Router Security Technical Implementation Guide

Version

V1R1

CCIs

CCI-001184

Discussion

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.

Check Content

Review the BGP configuration to determine if it is peering with multiple autonomous systems. Interview the information security systems manager (ISSM) and router administrator to determine if unique keys are being used. 

keychain AS-xxxx tcp
 key-id 1
  password 2 $Uyt9R3NVfURuXH1a
  authentication-algorithm aes-128-cmac
  send-lifetime start 03-05-2024 00:00:00 end 09-01-2024 00:00:00
  no accept-ao-mismatch
  send-id 1
  recv-id 1

keychain AS-yyyy tcp
 key-id 1
  password 2 $Uyt9R3123URuXH1a
  authentication-algorithm aes-128-cmac
  send-lifetime start 03-05-2024 00:00:00 end 09-01-2024 00:00:00
  no accept-ao-mismatch
  send-id 2
  recv-id 2

router bgp
 local-as xxxx
 neighbor x.0.0.1 remote-as 10
 neighbor x.0.0.1 ao AS-xxxx
 neighbor y.0.0.1 remote-as 11
 neighbor y.0.0.1 as AS-yyyy

If unique keys are not being used, this is a finding.

Fix Text

Configure the router to use unique keys for each AS it peers with as shown in the example below:

ICX(config)# keychain AS-xxxx
ICX(config-keychain-tcp-AS-xxxx)# key 1
ICX(config-keychain-tcp-AS-xxxx-key-1)# authentication-algorithm aes-128-cmac
ICX(config-keychain-tcp-AS-xxxx-key-1)# password pw_for_AS-xxxx
ICX(config-keychain-tcp-AS-xxxx-key-1)# no accept-ao-mismatch
ICX(config-keychain-tcp-AS-xxxx-key-1)# include-tcp-options
ICX(config-keychain-tcp-AS-xxxx-key-1)# send-id 1
ICX(config-keychain-tcp-AS-xxxx-key-1)# recv-id 1
ICX(config-keychain-tcp-AS-xxxx-key-1)# accept-lifetime start 03-05-24 10:10:10 end 15552000
ICX(config-keychain-tcp-AS-xxxx-key-1)# send-lifetime start 03-05-24 10:10:10 end 09-01-24 10:10:10
ICX(config)# keychain AS-yyyy
ICX(config-keychain-tcp-AS-yyyy)# key 1
ICX(config-keychain-tcp-AS-yyyy-key-1)# authentication-algorithm aes-128-cmac
ICX(config-keychain-tcp-AS-yyyy-key-1)# password pw_for_AS-yyyy
ICX(config-keychain-tcp-AS-yyyy-key-1)# no accept-ao-mismatch
ICX(config-keychain-tcp-AS-yyyy-key-1)# include-tcp-options
ICX(config-keychain-tcp-AS-yyyy-key-1)# send-id 2
ICX(config-keychain-tcp-AS-yyyy-key-1)# recv-id 2
ICX(config-keychain-tcp-AS-yyyy-key-1)# accept-lifetime start 03-05-24 10:10:10 end 15552000
ICX(config-keychain-tcp-AS-yyyy-key-1)# send-lifetime start 03-05-24 10:10:10 end 09-01-24 10:10:10

ICX(config)# router bgp
ICX(config-bgp-router)# local-as 1001
ICX(config-bgp-router)# neighbor x.0.0.1 remote-as 10
ICX(config-bgp-router)#neighbor x.0.0.1 ao AS-xxxx
ICX(config-bgp-router)# neighbor y.0.0.1 remote-as 10
ICX(config-bgp-router)#neighbor y.0.0.1 ao AS-yyyy