The Cisco router must be configured to have all non-essential capabilities disabled.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-216741	CISC-RT-000070	SV-216741r531087_rule		Low

Description
A compromised router introduces risk to the entire network infrastructure, as well as data resources that are accessible via the network. The perimeter defense has no oversight or control of attacks by malicious users within the network. Preventing network breaches from within is dependent on implementing a comprehensive defense-in-depth strategy, including securing each device connected to the network. This is accomplished by following and implementing all security guidance applicable for each node type. A fundamental step in securing each router is to enable only the capabilities required for operation.

Description

A compromised router introduces risk to the entire network infrastructure, as well as data resources that are accessible via the network. The perimeter defense has no oversight or control of attacks by malicious users within the network. Preventing network breaches from within is dependent on implementing a comprehensive defense-in-depth strategy, including securing each device connected to the network. This is accomplished by following and implementing all security guidance applicable for each node type. A fundamental step in securing each router is to enable only the capabilities required for operation.

STIG	Date
Cisco IOS XR Router RTR Security Technical Implementation Guide	2020-09-23

Details

Check Text ( C-17973r288615_chk )
Review the router configuration to verify that the router does not have any unnecessary or non-secure services enabled. For example, the following commands should not be in the configuration: service ipv4 tcp-small-servers max-servers 10 service ipv4 udp-small-servers max-servers 10 http client vrf xxxxx telnet vrf default ipv4 server max-servers 1 If any unnecessary services are enabled, this is a finding.

Check Text ( C-17973r288615_chk )

Review the router configuration to verify that the router does not have any unnecessary or non-secure services enabled. For example, the following commands should not be in the configuration:

service ipv4 tcp-small-servers max-servers 10
service ipv4 udp-small-servers max-servers 10
http client vrf xxxxx
telnet vrf default ipv4 server max-servers 1

If any unnecessary services are enabled, this is a finding.

Fix Text (F-17971r288616_fix)
Disable the following services if enabled as shown in the example below. RP/0/0/CPU0:R3(config)#no service ipv4 tcp-small-servers RP/0/0/CPU0:R3(config)#no service ipv4 udp-small-servers RP/0/0/CPU0:R3(config)#no http client vrf xxxxx RP/0/0/CPU0:R3(config)#no telnet ipv4 server