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Cisco NX OS Switch RTR Security Technical Implementation Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • SRG-NET-000018-RTR-000001

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must be configured to enforce approved authorizations for controlling the flow of information within the network based on organization-defined information flow control policies.

    &lt;VulnDiscussion&gt;Information flow control regulates where information is allowed to travel within a network and between interconnected network...
    Rule Medium Severity
    Show

  • SRG-NET-000230-RTR-000001

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must be configured to implement message authentication for all control plane protocols.

    &lt;VulnDiscussion&gt;A rogue switch could send a fictitious routing update to convince a site's perimeter switch to send traffic to an incorrect o...
    Rule Medium Severity
    Show

  • SRG-NET-000230-RTR-000003

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco switch must be configured to use keys with a duration not exceeding 180 days for authenticating routing protocol messages.

    &lt;VulnDiscussion&gt;If the keys used for routing protocol authentication are guessed, the malicious user could create havoc within the network by...
    Rule Medium Severity
    Show

  • SRG-NET-000168-RTR-000077

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco switch must be configured to use encryption for routing protocol authentication.

    &lt;VulnDiscussion&gt;A rogue switch could send a fictitious routing update to convince a site's perimeter switch to send traffic to an incorrect o...
    Rule Medium Severity
    Show

  • SRG-NET-000168-RTR-000078

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must be configured to authenticate all routing protocol messages using NIST-validated FIPS 198-1 message authentication code algorithm.

    &lt;VulnDiscussion&gt;A rogue switch could send a fictitious routing update to convince a site's perimeter switch to send traffic to an incorrect o...
    Rule Medium Severity
    Show

  • SRG-NET-000019-RTR-000007

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must be configured to have all inactive layer 3 interfaces disabled.

    &lt;VulnDiscussion&gt;An inactive interface is rarely monitored or controlled and may expose a network to an undetected attack on that interface. U...
    Rule Low Severity
    Show

  • SRG-NET-000131-RTR-000035

    <GroupDescription></GroupDescription>
    Group
    Show

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

    &lt;VulnDiscussion&gt;A compromised switch introduces risk to the entire network infrastructure, as well as data resources that are accessible via ...
    Rule Low Severity
    Show

  • SRG-NET-000131-RTR-000083

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must not be configured to have any feature enabled that calls home to the vendor.

    &lt;VulnDiscussion&gt;Call home services will routinely send data such as configuration and diagnostic information to the vendor for routine or eme...
    Rule Medium Severity
    Show

  • SRG-NET-000362-RTR-000110

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must be configured to protect against or limit the effects of denial-of-service (DoS) attacks by employing control plane protection.

    &lt;VulnDiscussion&gt;The Route Processor (RP) is critical to all network operations because it is the component used to build all forwarding paths...
    Rule Medium Severity
    Show

  • SRG-NET-000205-RTR-000001

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must be configured to restrict traffic destined to itself.

    &lt;VulnDiscussion&gt;The route processor handles traffic destined to the switch—the key component used to build forwarding paths and is instrument...
    Rule High Severity
    Show

  • SRG-NET-000205-RTR-000002

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must be configured to drop all fragmented Internet Control Message Protocol (ICMP) packets destined to itself.

    &lt;VulnDiscussion&gt;Fragmented ICMP packets can be generated by hackers for DoS attacks such as Ping O' Death and Teardrop. It is imperative that...
    Rule Medium Severity
    Show

  • SRG-NET-000362-RTR-000111

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must be configured to have Gratuitous ARP disabled on all external interfaces.

    &lt;VulnDiscussion&gt;A gratuitous ARP is an ARP broadcast in which the source and destination MAC addresses are the same. It is used to inform the...
    Rule Medium Severity
    Show

  • SRG-NET-000362-RTR-000112

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must be configured to have IP directed broadcast disabled on all interfaces.

    &lt;VulnDiscussion&gt;An IP directed broadcast is a datagram sent to the broadcast address of a subnet that is not directly attached to the sending...
    Rule Low Severity
    Show

  • SRG-NET-000362-RTR-000113

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must be configured to have Internet Control Message Protocol (ICMP) unreachable messages disabled on all external interfaces.

    &lt;VulnDiscussion&gt;The ICMP supports IP traffic by relaying information about paths, routes, and network conditions. Switches automatically send...
    Rule Medium Severity
    Show

  • SRG-NET-000362-RTR-000115

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must be configured to have Internet Control Message Protocol (ICMP) redirect messages disabled on all external interfaces.

    &lt;VulnDiscussion&gt;The ICMP supports IP traffic by relaying information about paths, routes, and network conditions. Switches automatically send...
    Rule Medium Severity
    Show

  • SRG-NET-000078-RTR-000001

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must be configured to log all packets that have been dropped at interfaces via an ACL.

    &lt;VulnDiscussion&gt;Auditing and logging are key components of any security architecture. It is essential for security personnel to know what is ...
    Rule Low Severity
    Show

  • SRG-NET-000202-RTR-000001

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco perimeter switch must be configured to deny network traffic by default and allow network traffic by exception.

    &lt;VulnDiscussion&gt;A deny-all, permit-by-exception network communications traffic policy ensures that only connections that are essential and ap...
    Rule High Severity
    Show

  • SRG-NET-000019-RTR-000002

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco perimeter switch must be configured to enforce approved authorizations for controlling the flow of information between interconnected networks in accordance with applicable policy.

    &lt;VulnDiscussion&gt;Information flow control regulates authorized information to travel within a network and between interconnected networks. Con...
    Rule Medium Severity
    Show

  • SRG-NET-000364-RTR-000109

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco perimeter switch must be configured to only allow incoming communications from authorized sources to be routed to authorized destinations.

    &lt;VulnDiscussion&gt;Unrestricted traffic may contain malicious traffic that poses a threat to an enclave or to other connected networks. Addition...
    Rule Medium Severity
    Show

  • SRG-NET-000364-RTR-000110

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco perimeter switch must be configured to block inbound packets with source Bogon IP address prefixes.

    &lt;VulnDiscussion&gt;Packets with Bogon IP source addresses should never be allowed to traverse the IP core. Bogon IP networks are RFC1918 address...
    Rule Medium Severity
    Show

  • SRG-NET-000205-RTR-000014

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco perimeter switch 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 (uRPF).

    &lt;VulnDiscussion&gt;A compromised host in an enclave can be used by a malicious platform to launch cyberattacks on third parties. This is a commo...
    Rule High Severity
    Show

  • SRG-NET-000205-RTR-000003

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco perimeter switch must be configured to filter traffic destined to the enclave in accordance with the guidelines contained in DoD Instruction 8551.1.

    &lt;VulnDiscussion&gt;Vulnerability assessments must be reviewed by the System Administrator, and protocols must be approved by the Information Ass...
    Rule Medium Severity
    Show

  • SRG-NET-000205-RTR-000004

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco perimeter switch must be configured to filter ingress traffic at the external interface on an inbound direction.

    &lt;VulnDiscussion&gt;Access lists are used to separate data traffic into that which it will route (permitted packets) and that which it will not r...
    Rule Medium Severity
    Show

  • SRG-NET-000205-RTR-000005

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco perimeter switch must be configured to filter egress traffic at the internal interface on an inbound direction.

    &lt;VulnDiscussion&gt;Access lists are used to separate data traffic into that which it will route (permitted packets) and that which it will not r...
    Rule Medium Severity
    Show

  • SRG-NET-000205-RTR-000015

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco perimeter switch must be configured to block all packets with any IP options.

    &lt;VulnDiscussion&gt;Packets with IP options are not fast switched and henceforth must be punted to the switch processor. Hackers who initiate den...
    Rule Medium Severity
    Show

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