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V-220504

CAT I (High)

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

Rule ID

SV-220504r1026075_rule

STIG

Cisco NX OS 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 router configuration to verify it is compliant with this requirement.

SSH Example

ssh ciphers aes128-ctr aes256-ctr

NOTE: Using "fips mode enable" to enable all FIPS protocols disables TACACS+ and RADIUS, which is required for authentication server requirements. It is recommended to enable FIPS-validated protocols manually and keep FIPS mode disabled.

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.

Fix Text

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)#ssh ciphers aes128-ctr aes256-ctr