Cisco IOS XE Release 3 RTR Security Technical Implementation Guide

Overview

Version	Date	Finding Count (23)			Downloads
1	2018-12-20 2017-06-28 2017-06-28 2018-02-20 2018-02-20	CAT I (High): 1	CAT II (Med): 22	CAT III (Low): 0	Excel	JSON	XML

STIG Description
This Security Technical Implementation Guide is published as a tool to improve the security of Department of Defense (DoD) information systems. The requirements are derived from the National Institute of Standards and Technology (NIST) 800-53 and related documents. Comments or proposed revisions to this document should be sent via email to the following address: disa.stig_spt@mail.mil.

Available Profiles

Classified	Public	Sensitive
I - Mission Critical Classified	I - Mission Critical Public	I - Mission Critical Sensitive	II - Mission Support Classified	II - Mission Support Public	II - Mission Support Sensitive	III - Administrative Classified	III - Administrative Public	III - Administrative Sensitive

Findings (MAC I - Mission Critical Public)

Finding ID	Severity	Title	Description
V-74107	High	The Cisco IOS XE router must protect an enclave connected to an Alternate Gateway by using an inbound filter that only permits packets with destination addresses within the sites address space.	Enclaves with Alternate Gateway connections must take additional steps to ensure there is no compromise on the enclave network or NIPRNet. Without verifying the destination address of traffic...
V-74103	Medium	The Cisco IOS XE router must establish boundaries for IPv6 Admin-Local, IPv6 Site-Local, IPv6 Organization-Local scope, and IPv4 Local-Scope multicast traffic.	If multicast traffic is forwarded beyond the intended boundary, it is possible that it can be intercepted by unauthorized or unintended personnel. Administrative scoped multicast addresses are...
V-74105	Medium	The Cisco IOS XE router must be configured so inactive interfaces are disabled.	An inactive interface is rarely monitored or controlled and may expose a network to an undetected attack on that interface. Unauthorized personnel with access to the communication facility could...
V-74123	Medium	The Cisco IOS XE router must be configured to restrict it from accepting outbound IP packets that contain an illegitimate address in the source address field via egress filter or by enabling Unicast Reverse Path Forwarding.	A compromised host in an enclave can be used by a malicious actor as a platform to launch cyber attacks on third parties. This is a common practice in "botnets", which are a collection of...
V-74121	Medium	The Cisco IOS XE router must be configured so that any key used for authenticating Interior Gateway Protocol peers does not have a duration exceeding 180 days.	If the keys used for routing protocol authentication are guessed, the malicious user could create havoc within the network by advertising incorrect routes and redirecting traffic. Some routing...
V-74119	Medium	The Cisco IOS XE router must enable neighbor router authentication for control plane protocols.	A rogue router could send a fictitious routing update to convince a site's perimeter router to send traffic to an incorrect or even a rogue destination. This diverted traffic could be analyzed to...
V-74125	Medium	The Cisco IOS XE router must be configured to disable non-essential capabilities.	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...
V-74141	Medium	The Cisco IOS XE router must only allow incoming communications from authorized sources to be routed to authorized destinations.	Unrestricted traffic may contain malicious traffic that poses a threat to an enclave or to other connected networks. Additionally, unrestricted traffic may transit a network, which uses bandwidth...
V-74127	Medium	The Cisco IOS XE router must encrypt all methods of configured authentication for routing protocols.	A rogue router could send a fictitious routing update to convince a site's perimeter router to send traffic to an incorrect or even a rogue destination. This diverted traffic could be analyzed to...
V-74113	Medium	The Cisco IOS XE router must enforce that Interior Gateway Protocol instances configured on the out-of-band management gateway router only peer with their own routing domain.	If the gateway router is not a dedicated device for the out-of-band management network, implementation of several safeguards for containment of management and production traffic boundaries must...
V-74111	Medium	The Cisco IOS XE router must not redistribute static routes to alternate gateway service provider into an Exterior Gateway Protocol or Interior Gateway Protocol to the NIPRNet or to other Autonomous System.	If the static routes to the alternate gateway are being redistributed into an Exterior Gateway Protocol or Interior Gateway Protocol to a NIPRNet gateway, this could make traffic on NIPRNet flow...
V-74117	Medium	The Cisco IOS XE router must enforce that any interface used for out-of-band management traffic is configured to be passive for the Interior Gateway Protocol that is utilized on that management interface.	The out-of-band management access switch will connect to the management interface of the managed network elements. The management interface can be a true out-of-band management interface or a...
V-74115	Medium	The Cisco IOS XE router must enforce that the managed network domain and the management network domain are separate routing domains and the Interior Gateway Protocol instances are not redistributed or advertised to each other.	If the gateway router is not a dedicated device for the out-of-band management network, several safeguards must be implemented for containment of management and production traffic boundaries,...
V-74135	Medium	The Cisco IOS XE router must restrict BGP connections to known IP addresses of neighbor routers from trusted Autonomous Systems (AS).	Advertisement of routes by an Autonomous System for networks that do not belong to any of its trusted peers pulls traffic away from the authorized network. This causes a DoS on the network that...
V-74137	Medium	The Cisco IOS XE router must configure the maximum hop limit value to at least 32.	The Neighbor Discovery protocol allows a hop limit value to be advertised by routers in a Router Advertisement message to be used by hosts instead of the standardized default value. If a very...
V-74131	Medium	The Cisco IOS XE router must manage excess bandwidth to limit the effects of packet flooding types of denial of service (DoS) attacks.	Denial of service is a condition when a resource is not available for legitimate users. Packet flooding DDoS attacks are referred to as volumetric attacks and have the objective of overloading a...
V-74133	Medium	The Cisco IOS XE router must have IP source routing disabled.	Source routing is a feature of IP, whereby individual packets can specify routes. This feature is used in several different network attacks by bypassing perimeter and internal defense mechanisms.
V-74129	Medium	The Cisco IOS XE router must ensure all Exterior Border Gateway Protocol (eBGP) routers are configured to use Generalized TTL Security Mechanism (GTSM).	As described in RFC 3682, Generalized TTL Security Mechanism (GTSM) is designed to protect a router's IP-based control plane from DoS attacks. Many attacks focused on CPU load and line-card...
V-74139	Medium	The Cisco IOS XE router must protect against or limit the effects of denial of service (DoS) attacks by employing control plane protection.	The Route Processor (RP) is critical to all network operations because it is the component used to build all forwarding paths for the data plane via control plane processes. It is also...
V-74099	Medium	The Cisco IOS XE router must bind a Protocol Independent Multicast (PIM) neighbor filter to interfaces that have PIM enabled.	Protocol Independent Multicast (PIM) is a routing protocol used to build multicast distribution trees for forwarding multicast traffic across the network infrastructure. Protocol Independent...
V-74109	Medium	The Cisco IOS XE router must not be a BGP peer with a router from an Autonomous System belonging to any Alternate Gateway.	The perimeter router will not use a routing protocol to advertise NIPRNet addresses to Alternate Gateways. Most ISPs use Border Gateway Protocol (BGP) to share route information with other...
V-74097	Medium	The Cisco IOS XE router must disable Protocol Independent Multicast (PIM) on all interfaces that are not required to support multicast routing.	If multicast traffic is forwarded beyond the intended boundary, it is possible that it can be intercepted by unauthorized or unintended personnel. Limiting where, within the network, a given...
V-74095	Medium	The Cisco IOS XE router must enforce approved authorizations for controlling the flow of information between interconnected networks in accordance with applicable policy.	Information flow control regulates authorized information to travel within a network and between interconnected networks. Controlling the flow of network traffic is critical so it does not...