The Cisco router must not be configured to have any zero-touch deployment feature enabled when connected to an operational network.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-96519	CISC-RT-000090	SV-105657r1_rule		Medium

Description
Network devices that are configured via a zero-touch deployment or auto-loading feature can have their startup configuration or image pushed to the device for installation via TFTP or Remote Copy (rcp). Loading an image or configuration file from the network is taking a security risk because the file could be intercepted by an attacker who could corrupt the file, resulting in a denial of service.

STIG	Date
Cisco IOS Router RTR Security Technical Implementation Guide	2019-07-25

Details

Check Text ( C-95355r1_chk )

Review the device configuration to determine if auto-configuration or zero-touch deployment via Cisco Networking Services (CNS) is enabled. Auto-configuration example version 15.0 service config … … … boot-start-marker boot network tftp://x.x.x.x/R5-config boot-end-marker CNS Zero-Touch Example cns trusted-server config x.x.x.x cns trusted-server image x.x.x.x cns config initial x.x.x.x 80 cns exec 80 cns image If a configuration auto-loading feature or zero-touch deployment feature is enabled, this is a finding. Note: Auto-configuration or zero-touch deployment features can be enabled when the router is offline for the purpose of image loading or building out the configuration. In addition, this would not be applicable to the provisioning of virtual routers via a software-defined network (SDN) orchestration system.

Fix Text (F-102195r1_fix)
Disable configuration auto-loading if enabled using the following commands. R8(config)#no boot network R8(config)#no service config Disable CNS zero-touch deployment if enabled as shown in the example below. R2(config)#no cns config initial R2(config)#no cns exec R2(config)#no cns image R2(config)#no cns trusted-server config x.x.x.x R2(config)#no cns trusted-server image x.x.x.x