Each eBGP neighbor must be authenticated with a unique password.

From Perimeter L3 Switch Security Technical Implementation Guide - Cisco

Part of Unique keys are not used for eBGP authentication.

Associated with IA controls: ECSC-1

SV-15300r2_rule Each eBGP neighbor must be authenticated with a unique password.

Vulnerability discussion

If the same passwords 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 password used for the eBGP session. This user would then be able to hijack BGP sessions with other trusted neighbors.

Check content

Review the device configuration to determine if each eBGP peer is authenticated with a unique password. If a unique password is not configured for each eBGP peer, this is a finding.

Fix text

Configure unique password for each eBGP neighbor.

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