The Juniper BGP router must be configured to use a unique key for each autonomous system (AS) that it peers with.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-254026 | JUEX-RT-000540 | SV-254026r844111_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 |
|---|---|
| Juniper EX Series Switches Router Security Technical Implementation Guide | 2023-03-23 |
Details
| Check Text ( C-57478r844109_chk ) |
|---|
| Interview the ISSM and router administrator to determine if unique keys are being used. [edit security ipsec] security-association manual { direction bidirectional { protocol esp; spi authentication { algorithm hmac-sha-256-128; key ascii-text "$8$aes256-gcm$hmac-sha2-256$100$SpJ/ERRFEsc$y1Wqf1zM3d3xI+ZVB9WzTw$lgM06LJZN3FcVbTaSkDz4g$bZVi57MkUWg"; ## SECRET-DATA } } } } [edit protocols bgp] group type external; local-as neighbor authentication-key "$8$aes256-gcm$hmac-sha2-256$100$cFQ99Gy83Og$SCMVXvnfna7/cZqH9fCECQ$bCVokm+es94xFJONmbKFNA$4561Uc/r"; ## SECRET-DATA } neighbor ipsec-sa } } Note: Juniper BGP routers support either an MD5 key, rotating MD5 keys, or an IPsec security association (SA). Verify the PSK for each MD5 and SA is different between all neighbors. If unique keys are not being used, this is a finding. |
| Fix Text (F-57429r844110_fix) |
|---|
| Configure all eBGP routers with unique keys for each eBGP neighbor that it peers with. set security ipsec security-association set security ipsec security-association set security ipsec security-association set security ipsec security-association set protocols bgp group set protocols bgp group set protocols bgp group set protocols bgp group |