CISC-ND-001210 The Cisco router must be configured to implement cryptographic mechanisms to protect the confidentiality of remote maintenance sessions.
All changes in this version
Maps to MA-4(6) via CCI-003123
Title
The Cisco router must be configured to implement cryptographic mechanisms to protect the confidentiality of remote maintenance sessions.
Control
Review the Cisco router configuration to verify that it is compliant with this requirement. SSH Example ip ssh version 2 ip ssh server algorithm encryption aes256-ctr aes192-ctr aes128-ctr If the router is not configured to implement cryptographic mechanisms to protect the confidentiality of remote maintenance sessions using a FIPS 140-2 approved algorithm, this is a finding.
Discussion
This requires the use of secure protocols instead of their unsecured counterparts, such as SSH instead of telnet, SCP instead of FTP, and HTTPS instead of HTTP. If unsecured protocols (lacking cryptographic mechanisms) are used for sessions, the contents of those sessions will be susceptible to eavesdropping, potentially putting sensitive data (including administrator passwords) at risk of compromise and potentially allowing hijacking of maintenance sessions.
Related controls
CCI-003123
Fix
Configure the Cisco router to implement cryptographic mechanisms to protect the confidentiality of remote maintenance sessions using a FIPS 140-2 approved algorithm as shown in the examples below. SSH Example R1(config)#ip ssh server algorithm encryption aes256-ctr aes192-ctr aes128-ctr