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II - Mission Support Sensitive

Rules and Groups employed by this XCCDF Profile

  • SRG-NET-000205-RTR-000014

    <GroupDescription></GroupDescription>
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  • The Juniper perimeter 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 (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
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  • SRG-NET-000205-RTR-000003

    <GroupDescription></GroupDescription>
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  • The Juniper perimeter router 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
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  • SRG-NET-000205-RTR-000004

    <GroupDescription></GroupDescription>
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  • The Juniper perimeter router 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
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  • SRG-NET-000205-RTR-000005

    <GroupDescription></GroupDescription>
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  • The Juniper perimeter router 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
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  • SRG-NET-000205-RTR-000015

    <GroupDescription></GroupDescription>
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  • The Juniper perimeter router 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 router processor. Hackers who initiate den...
    Rule Medium Severity
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  • SRG-NET-000364-RTR-000111

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  • The Juniper perimeter router must be configured to have Link Layer Discovery Protocol (LLDP) disabled on all external interfaces.

    &lt;VulnDiscussion&gt;LLDPs are primarily used to obtain protocol addresses of neighboring devices and discover platform capabilities of those devi...
    Rule Low Severity
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  • SRG-NET-000364-RTR-000112

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  • The Juniper perimeter router must be configured to have Proxy ARP disabled on all external interfaces.

    &lt;VulnDiscussion&gt;When Proxy ARP is enabled on a router, it allows that router to extend the network (at Layer 2) across multiple interfaces (L...
    Rule Medium Severity
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  • SRG-NET-000364-RTR-000113

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  • The Juniper perimeter router must be configured to block all outbound management traffic.

    &lt;VulnDiscussion&gt;For in-band management, the management network must have its own subnet in order to enforce control and access boundaries pro...
    Rule Medium Severity
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  • SRG-NET-000205-RTR-000009

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  • The Juniper out-of-band management (OOBM) gateway router must be configured to transport management traffic to the Network Operations Center (NOC) via dedicated circuit, MPLS/VPN service, or IPsec tunnel.

    &lt;VulnDiscussion&gt;Using dedicated paths, the OOBM backbone connects the OOBM gateway routers located at the edge of the managed network and at ...
    Rule Medium Severity
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  • SRG-NET-000205-RTR-000010

    <GroupDescription></GroupDescription>
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  • The Juniper out-of-band management (OOBM) gateway router must be configured to forward only authorized management traffic to the Network Operations Center (NOC).

    &lt;VulnDiscussion&gt;The OOBM network is an IP network used exclusively for the transport of OAM&amp;P data from the network being managed to the ...
    Rule Medium Severity
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  • SRG-NET-000019-RTR-000011

    <GroupDescription></GroupDescription>
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  • The Juniper out-of-band management (OOBM) gateway router must be configured to have separate IGP instances for the managed network and management network.

    &lt;VulnDiscussion&gt;If the gateway router is not a dedicated device for the OOBM network, implementation of several safeguards for containment of...
    Rule Medium Severity
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  • SRG-NET-000019-RTR-000012

    <GroupDescription></GroupDescription>
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  • The Juniper out-of-band management (OOBM) gateway router must be configured to not redistribute routes between the management network routing domain and the managed network routing domain.

    &lt;VulnDiscussion&gt;If the gateway router is not a dedicated device for the OOBM network, several safeguards must be implemented for containment ...
    Rule Medium Severity
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  • SRG-NET-000205-RTR-000011

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  • The Juniper out-of-band management (OOBM) gateway router must be configured to block any traffic destined to itself that is not sourced from the OOBM network or the NOC.

    &lt;VulnDiscussion&gt;If the gateway router is not a dedicated device for the OOBM network, several safeguards must be implemented for containment ...
    Rule Medium Severity
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  • SRG-NET-000205-RTR-000012

    <GroupDescription></GroupDescription>
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  • The Juniper router must be configured to only permit management traffic that ingresses and egresses the OOBM interface.

    &lt;VulnDiscussion&gt;The OOBM access switch will connect to the management interface of the managed network elements. The management interface can...
    Rule Medium Severity
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  • SRG-NET-000205-RTR-000013

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  • The Juniper router providing connectivity to the NOC must be configured to forward all in-band management traffic via an IPsec tunnel.

    &lt;VulnDiscussion&gt;When the production network is managed in-band, the management network could be housed at a NOC that is located remotely at s...
    Rule Medium Severity
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  • SRG-NET-000362-RTR-000124

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  • The Juniper BGP router must be configured to enable the Generalized TTL Security Mechanism (GTSM).

    &lt;VulnDiscussion&gt;GTSM is designed to protect a router's IP-based control plane from DoS attacks. Many attacks focused on CPU load and line-car...
    Rule Low Severity
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  • SRG-NET-000230-RTR-000002

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  • The Juniper BGP router must be configured to use a unique key for each autonomous system (AS) that it peers with.

    &lt;VulnDiscussion&gt;If the same keys are used between eBGP neighbors, the chance of a hacker compromising any of the BGP sessions increases. It i...
    Rule Medium Severity
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  • SRG-NET-000018-RTR-000002

    <GroupDescription></GroupDescription>
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  • The Juniper BGP router 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
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  • SRG-NET-000018-RTR-000003

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  • The Juniper BGP router must be configured to reject inbound route advertisements for any prefixes belonging to the local autonomous system (AS).

    &lt;VulnDiscussion&gt;Accepting route advertisements belonging to the local AS can result in traffic looping or being black holed, or at a minimum ...
    Rule Medium Severity
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  • SRG-NET-000018-RTR-000004

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  • The Juniper BGP router must be configured to reject inbound route advertisements from a customer edge (CE) Juniper router for prefixes that are not allocated to that customer.

    &lt;VulnDiscussion&gt;As a best practice, a service provider should only accept customer prefixes that have been assigned to that customer and any ...
    Rule Medium Severity
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  • SRG-NET-000018-RTR-000005

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  • The Juniper BGP router must be configured to reject outbound route advertisements for any prefixes that do not belong to any customers or the local autonomous system (AS).

    &lt;VulnDiscussion&gt;Advertisement of routes by an autonomous system for networks that do not belong to any of its customers pulls traffic away fr...
    Rule Medium Severity
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  • SRG-NET-000205-RTR-000006

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  • The Juniper BGP router must be configured to reject outbound route advertisements for any prefixes belonging to the IP core.

    &lt;VulnDiscussion&gt;Outbound route advertisements belonging to the core can result in traffic either looping or being black holed, or at a minimu...
    Rule Medium Severity
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  • SRG-NET-000018-RTR-000006

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  • The Juniper BGP router must be configured to reject route advertisements from BGP peers that do not list their autonomous system (AS) number as the first AS in the AS_PATH attribute.

    &lt;VulnDiscussion&gt;Verifying the path a route has traversed will ensure the IP core is not used as a transit network for unauthorized or possibl...
    Rule Low Severity
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  • SRG-NET-000018-RTR-000010

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  • The Juniper BGP router must be configured to reject route advertisements from CE routers with an originating AS in the AS_PATH attribute that does not belong to that customer.

    &lt;VulnDiscussion&gt;Verifying the path a route has traversed will ensure that the local AS is not used as a transit network for unauthorized traf...
    Rule Low Severity
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  • SRG-NET-000362-RTR-000117

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  • The Juniper BGP router must be configured to use the maximum prefixes feature to protect against route table flooding and prefix de-aggregation attacks.

    &lt;VulnDiscussion&gt;The effects of prefix de-aggregation can degrade router performance due to the size of routing tables and also result in blac...
    Rule Medium Severity
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