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V-101597

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

Finding ID
CISC-RT-000090
Rule ID
SV-110701r1_rule
Severity
Cat II
CCE
(None)
Group Title
SRG-NET-000362-RTR-000109
CCI
CCI-002385
Target Key
(None)
Documentable
No
Discussion

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.

Fix Text

Disable configuration auto-loading if enabled using the following commands: SW1(config)#no boot network SW1(config)#no service config Disable CNS zero-touch deployment if enabled as shown in the example below: SW2(config)#no cns config initial SW2(config)#no cns exec SW2(config)#no cns image SW2(config)#no cns trusted-server config x.x.x.x SW2(config)#no cns trusted-server image x.x.x.x

Check Content

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 switch 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 switches via a software-defined network (SDN) orchestration system.