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I - Mission Critical Classified

Rules and Groups employed by this XCCDF Profile

  • SRG-NET-000193-L2S-000020

    <GroupDescription></GroupDescription>
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  • The Arista MLS layer 2 switch must be configured for Storm Control to limit the effects of packet flooding types of denial-of-service (DoS) attacks.

    &lt;VulnDiscussion&gt;Denial of service is a condition when a resource is not available for legitimate users. Packet flooding distributed DoS (DDoS...
    Rule Medium Severity
    Show

  • SRG-NET-000362-L2S-000021

    <GroupDescription></GroupDescription>
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  • The Arista MLS switch must have Root Guard enabled on all switch ports connecting to access layer switches and hosts.

    &lt;VulnDiscussion&gt;Spanning Tree Protocol (STP) does not provide any means for the network administrator to securely enforce the topology of the...
    Rule Low Severity
    Show

  • SRG-NET-000362-L2S-000022

    <GroupDescription></GroupDescription>
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  • The Arista MLS layer 2 switch must have BPDU Guard enabled on all switch ports connecting to access layer switches and hosts.

    &lt;VulnDiscussion&gt;If a rogue switch is introduced into the topology and transmits a Bridge Protocol Data Unit (BPDU) with a lower bridge priori...
    Rule Medium Severity
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  • SRG-NET-000362-L2S-000023

    <GroupDescription></GroupDescription>
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  • The Arista MLS switch must have STP Loop Guard enabled on all nondesignated STP switch ports.

    &lt;VulnDiscussion&gt;The Spanning Tree Protocol (STP) loop guard feature provides additional protection against STP loops. An STP loop is created ...
    Rule Medium Severity
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  • SRG-NET-000362-L2S-000025

    <GroupDescription></GroupDescription>
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  • The Arista MLS layer 2 switch must have DHCP snooping for all user VLANs to validate DHCP messages from untrusted sources.

    &lt;VulnDiscussion&gt;In an enterprise network, devices under administrative control are trusted sources. These devices include the switches, route...
    Rule Medium Severity
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  • SRG-NET-000362-L2S-000026

    <GroupDescription></GroupDescription>
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  • The Arista MLS layer 2 switch must have IP Source Guard enabled on all user-facing or untrusted access switch ports.

    &lt;VulnDiscussion&gt;IP Source Guard (IPSG) provides source IP address filtering on a layer 2 port to prevent a malicious host from impersonating ...
    Rule Medium Severity
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  • SRG-NET-000362-L2S-000027

    <GroupDescription></GroupDescription>
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  • The Arista MLS layer 2 switch must have Dynamic Address Resolution Protocol (ARP) Inspection (DAI) enabled on all user VLANs.

    &lt;VulnDiscussion&gt;DAI intercepts Address Resolution Protocol (ARP) requests and verifies that each of these packets has a valid IP-to-MAC addre...
    Rule Medium Severity
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  • SRG-NET-000512-L2S-000002

    <GroupDescription></GroupDescription>
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  • The Arista MLS layer 2 switch must have IGMP or MLD Snooping configured on all VLANs.

    &lt;VulnDiscussion&gt;IGMP and MLD snooping provides a way to constrain multicast traffic at Layer 2. By monitoring the IGMP or MLD membership repo...
    Rule Low Severity
    Show

  • SRG-NET-000512-L2S-000003

    <GroupDescription></GroupDescription>
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  • The Arista MLS layer 2 Arista MLS switch must implement Rapid STP where VLANs span multiple switches with redundant links.

    &lt;VulnDiscussion&gt;Spanning Tree Protocol (STP) is implemented on bridges and switches to prevent layer 2 loops when a broadcast domain spans mu...
    Rule Medium Severity
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  • SRG-NET-000512-L2S-000004

    <GroupDescription></GroupDescription>
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  • The Arista MLS layer 2 switch must enable Unidirectional Link Detection (UDLD) to protect against one-way connections.

    &lt;VulnDiscussion&gt;In topologies where fiber optic interconnections are used, physical misconnections can occur that allow a link to appear to b...
    Rule Medium Severity
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  • SRG-NET-000512-L2S-000005

    <GroupDescription></GroupDescription>
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  • The Arista MLS layer 2 switch must have all trunk links enabled statically.

    &lt;VulnDiscussion&gt;When trunk negotiation is enabled via Dynamic Trunk Protocol (DTP), considerable time can be spent negotiating trunk settings...
    Rule Medium Severity
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  • SRG-NET-000512-L2S-000007

    <GroupDescription></GroupDescription>
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  • The Arista MLS layer 2 switch must have all disabled switch ports assigned to an unused VLAN.

    &lt;VulnDiscussion&gt;It is possible that a disabled port that is assigned to a user or management VLAN becomes enabled by accident or by an attack...
    Rule Medium Severity
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  • SRG-NET-000512-L2S-000008

    <GroupDescription></GroupDescription>
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  • The Arista MLS layer 2 switch must not have the default VLAN assigned to any host-facing switch ports.

    &lt;VulnDiscussion&gt;In a VLAN-based network, switches use the default VLAN (i.e., VLAN 1) for in-band management and to communicate with other ne...
    Rule Medium Severity
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  • SRG-NET-000512-L2S-000009

    <GroupDescription></GroupDescription>
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  • The Arista MLS layer 2 switch must have the default VLAN pruned from all trunk ports that do not require it.

    &lt;VulnDiscussion&gt;The default VLAN (i.e., VLAN 1) is a special VLAN used for control plane traffic such as Spanning-Tree Protocol (STP), Dynami...
    Rule Medium Severity
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  • SRG-NET-000512-L2S-000010

    <GroupDescription></GroupDescription>
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  • The Arista MLS layer 2 switch must not use the default VLAN for management traffic.

    &lt;VulnDiscussion&gt;Switches use the default VLAN (i.e., VLAN 1) for in-band management and to communicate with directly connected switches using...
    Rule Medium Severity
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  • SRG-NET-000512-L2S-000011

    <GroupDescription></GroupDescription>
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  • The Arista MLS layer 2 switch must have all user-facing or untrusted ports configured as access switch ports.

    &lt;VulnDiscussion&gt;Double encapsulation can be initiated by an attacker who has access to a switch port belonging to the native VLAN of the trun...
    Rule Medium Severity
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  • SRG-NET-000512-L2S-000012

    <GroupDescription></GroupDescription>
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  • The Arista MLS layer 2 switch must have the native VLAN assigned to an ID other than the default VLAN for all 802.1q trunk links.

    &lt;VulnDiscussion&gt;VLAN hopping can be initiated by an attacker who has access to a switch port belonging to the same VLAN as the native VLAN of...
    Rule Medium Severity
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  • SRG-NET-000512-L2S-000013

    <GroupDescription></GroupDescription>
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  • The Arista MLS layer 2 switch must not have any switch ports assigned to the native VLAN.

    &lt;VulnDiscussion&gt;Double encapsulation can be initiated by an attacker who has access to a switch port belonging to the native VLAN of the trun...
    Rule Low Severity
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