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Cisco IOS XE Switch RTR Security Technical Implementation Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • The Cisco perimeter switch must be configured to suppress Router Advertisements on all external IPv6-enabled interfaces.

    <VulnDiscussion>Many of the known attacks in stateless autoconfiguration are defined in RFC 3756 were present in IPv4 ARP attacks. To mitigat...
    Rule Medium Severity
    Show

  • SRG-NET-000364-RTR-000200

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco perimeter switch must be configured to drop IPv6 undetermined transport packets.

    &lt;VulnDiscussion&gt;One of the fragmentation weaknesses known in IPv6 is the undetermined transport packet. This packet contains an undetermined ...
    Rule Medium Severity
    Show

  • SRG-NET-000364-RTR-000201

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco perimeter switch must be configured drop IPv6 packets with a Routing Header type 0, 1, or 3-255.

    &lt;VulnDiscussion&gt;The routing header can be used maliciously to send a packet through a path where less robust security is in place, rather tha...
    Rule Medium Severity
    Show

  • SRG-NET-000364-RTR-000202

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco perimeter switch must be configured to drop IPv6 packets containing a Hop-by-Hop header with invalid option type values.

    &lt;VulnDiscussion&gt;These options are intended to be for the Destination Options header only. The optional and extensible natures of the IPv6 ext...
    Rule Medium Severity
    Show

  • SRG-NET-000364-RTR-000203

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco perimeter switch must be configured to drop IPv6 packets containing a Destination Option header with invalid option type values.

    &lt;VulnDiscussion&gt;These options are intended to be for the Hop-by-Hop header only. The optional and extensible natures of the IPv6 extension he...
    Rule Medium Severity
    Show

  • SRG-NET-000364-RTR-000204

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco perimeter switch must be configured to drop IPv6 packets containing an extension header with the Endpoint Identification option.

    &lt;VulnDiscussion&gt;The optional and extensible natures of the IPv6 extension headers require higher scrutiny since many implementations do not a...
    Rule Medium Severity
    Show

  • SRG-NET-000364-RTR-000205

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco perimeter switch must be configured to drop IPv6 packets containing the NSAP address option within Destination Option header.

    &lt;VulnDiscussion&gt;The optional and extensible natures of the IPv6 extension headers require higher scrutiny since many implementations do not a...
    Rule Medium Severity
    Show

  • SRG-NET-000364-RTR-000206

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco perimeter switch must be configured to drop IPv6 packets containing a Hop-by-Hop or Destination Option extension header with an undefined option type.

    &lt;VulnDiscussion&gt;The optional and extensible natures of the IPv6 extension headers require higher scrutiny since many implementations do not a...
    Rule Medium Severity
    Show

  • SRG-NET-000018-RTR-000001

    <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-000076-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-000168-RTR-000078

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must be configured to enable routing protocol authentication using FIPS 198-1 algorithms with keys not exceeding 180 days of lifetime.

    &lt;VulnDiscussion&gt;A rogue router could send a fictitious routing update to convince a site's perimeter router 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-000362-RTR-000109

    <GroupDescription></GroupDescription>
    Group
    Show

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

    &lt;VulnDiscussion&gt;Network devices that are configured via a zero-touch deployment or auto-loading feature can have their startup configuration ...
    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 High 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-000114

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must be configured to have Internet Control Message Protocol (ICMP) mask reply 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 produce audit records containing information to establish where the events occurred.

    &lt;VulnDiscussion&gt;Without establishing where events occurred, it is impossible to establish, correlate, and investigate the events leading up t...
    Rule Medium Severity
    Show

  • SRG-NET-000077-RTR-000001

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must be configured to produce audit records containing information to establish the source of the events.

    &lt;VulnDiscussion&gt;Without establishing the source of the event, it is impossible to establish, correlate, and investigate the events leading up...
    Rule Medium Severity
    Show

  • SRG-NET-000019-RTR-000001

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must be configured to disable the auxiliary port unless it is connected to a secured modem providing encryption and authentication.

    &lt;VulnDiscussion&gt;The use of POTS lines to modems connecting to network devices provides clear text of authentication traffic over commercial c...
    Rule Low Severity
    Show

  • SRG-NET-000202-RTR-000001

    <GroupDescription></GroupDescription>
    Group
    Show

  • 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
    Show

  • 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 BGP switch must be configured to reject inbound route advertisements for any Bogon prefixes.

    &lt;VulnDiscussion&gt;Accepting route advertisements for Bogon prefixes can result in the local autonomous system (AS) becoming a transit for malic...
    Rule Medium Severity
    Show

  • SRG-NET-000018-RTR-000003

    <GroupDescription></GroupDescription>
    Group
    Show

Node 2

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