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V-220556

CAT I (High)

The Cisco switch must be configured to implement cryptographic mechanisms to protect the confidentiality of remote maintenance sessions.

Rule ID

SV-220556r961557_rule

STIG

Cisco IOS XE Switch NDM Security Technical Implementation Guide

Version

V3R6

CCIs

CCI-003123

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.

Check Content

Review the Cisco switch configuration to verify that it is compliant with this requirement.

ip ssh version 2
ip ssh server algorithm encryption aes256-ctr aes192-ctr aes128-ctr 

If the switch 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.

Fix Text

Configure the Cisco switch to implement cryptographic mechanisms to protect the confidentiality of remote maintenance sessions using a FIPS 140-2 approved algorithm as shown in the example below:

SW1(config)#iip ssh server algorithm encryption aes256-ctr aes192-ctr aes128-ctr