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

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-96147	CISC-ND-001210	SV-105285r1_rule		High

Description
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.

Description

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.

STIG	Date
Cisco IOS Router NDM Security Technical Implementation Guide	2020-06-04

Details

Check Text ( C-94979r1_chk )
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 aes128-cbc aes128-ctr aes192-cbc aes192-ctr HTTPS Example ip http secure-server ip http secure-ciphersuite aes-128-cbc-sha ip http secure-client-auth ip http secure-trustpoint CA_XXX 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.

Check Text ( C-94979r1_chk )

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 aes128-cbc aes128-ctr aes192-cbc aes192-ctr

HTTPS Example

ip http secure-server
ip http secure-ciphersuite aes-128-cbc-sha
ip http secure-client-auth
ip http secure-trustpoint CA_XXX

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 (F-101823r1_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 aes128-cbc aes128-ctr aes192-cbc aes192-ctr HTTPS Example R2(config)#ip http secure-ciphersuite aes-128-cbc-sha