V-217052

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 ISSM and router administrator to determine if unique keys are being used. 

protocols {
    bgp {
        group AS44 {
            type external;
            peer-as 44;
            neighbor x.x.x.x {
                authentication-key "$8$tBga0ORx7VsYoIEgJ"; ## SECRET-DATA
            }
        }
        group AS66 {
            type external;
            peer-as 66;
            neighbor x.x.x.x {
                authentication-key "$8$Q4953nCrlMLX-9A7V"; ## SECRET-DATA
            }
        }
    }

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