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The BGP Cisco ACI must be configured to use a unique key for each autonomous system (AS) it peers with.

Overview

Finding IDVersionRule IDIA ControlsSeverity
V-272083CACI-RT-000023SV-272083r1114278_ruleCCI-001184medium
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.
STIGDate
Cisco ACI Router Security Technical Implementation Guide2025-06-18

Related Frameworks

1 mapping across 4 frameworks
SCF0 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (1) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

NET-09Session Integrity
1.00
NIST 800-530 mappings

No source states a mapping between these directly.

Also reachable in 2 hops (30) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

AC-17(2)Protection of Confidentiality and Integrity Using Encryption
1.00
AU-10(1)Association of Identities
1.00
AU-10(2)Validate Binding of Information Producer Identity
1.00
AU-9(3)Cryptographic Protection
1.00
CM-14Signed Components
1.00
CM-5(3)Signed Components
1.00
CM-6Configuration Settings
1.00
CM-7Least Functionality
1.00
IA-2(1)Multi-factor Authentication to Privileged Accounts
1.00
IA-2(12)Acceptance of PIV Credentials
1.00

+20 more (top 10 by confidence shown)

NIST 800-1710 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (1) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

3.13.15
1.00
CCI1 mapping
CCI-001184
1.00

Details

Check Text (C-272083r1114278_chk)

Review the configuration. Verify the neighbor authentication keys on ACI border leaf switches use a different authentication key for each AS peer. Route maps can also show this view. ip tcp authentication key chain AS100 key 1 send-id 10 recv-id 10 key 2 send-id 20 recv-id 20 ip tcp authentication key chain AS200 key 1 send-id 30 recv-id 30 key 2 send-id 40 recv-id 40 router bgp 100 neighbor 10.0.0.1 ao AS100 router bgp 200 neighbor 10.0.1.1 ao AS200 If unique keys are not being used, this is a finding.

Fix Text (F-76040r1114277_fix)

Configure unique keys for each AS peered by a Cisco ACI device using TCP-AO by creating separate key chains for each AS, ensuring each key chain contains unique "send-id" and "recv-id" values for the keys within it, and then associating the appropriate key chain with the BGP neighbor configuration for that specific AS. The following is an example: 1. Create key chain for AS100. apic1(config)# ip tcp authentication key chain AS100 apic1(config)# key 1 send-id 10 recv-id 10 apic1(config)# key 2 send-id 20 recv-id 20 2. Create key chain for AS 200. apic1(config)#ip tcp authentication key chain AS200 apic1(config)# key 1 send-id 30 recv-id 30 apic1(config)# key 2 send-id 40 recv-id 40 3. Configure BGP neighbor with AS100 using key chain AS100. apic1(config)# router bgp 100 apic1(config-router)# neighbor 10.0.0.1 ao AS100 4. Configure BGP neighbor with AS 200 using key chain AS200. apic1(config)# router bgp 200 apic1(config-router)# neighbor 10.0.1.1 ao AS200