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Cisco IOS XR Router NDM Security Technical Implementation Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • SRG-APP-000038-NDM-000213

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco router must be configured to enforce approved authorizations for controlling the flow of management information within the device based on control policies.

    &lt;VulnDiscussion&gt;A mechanism to detect and prevent unauthorized communication flow must be configured or provided as part of the system design...
    Rule Medium Severity
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  • SRG-APP-000065-NDM-000214

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco router must be configured to enforce the limit of three consecutive invalid logon attempts after which time lock out the user account from accessing the device for 15 minutes.

    &lt;VulnDiscussion&gt;By limiting the number of failed login attempts, the risk of unauthorized system access via user password guessing, otherwise...
    Rule Medium Severity
    Show

  • SRG-APP-000068-NDM-000215

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco router must be configured to display the Standard Mandatory DoD Notice and Consent Banner before granting access to the device.

    &lt;VulnDiscussion&gt;Display of the DoD-approved use notification before granting access to the network device ensures privacy and security notifi...
    Rule Medium Severity
    Show

  • SRG-APP-000091-NDM-000223

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco router must be configured to generate audit records when successful/unsuccessful attempts to logon with access privileges occur.

    &lt;VulnDiscussion&gt;Without generating audit records that are specific to the security and mission needs of the organization, it would be difficu...
    Rule Medium Severity
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  • SRG-APP-000096-NDM-000226

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco router must produce audit records containing information to establish when (date and time) the events occurred.

    &lt;VulnDiscussion&gt;It is essential for security personnel to know what is being done, what was attempted, where it was done, when it was done, a...
    Rule Medium Severity
    Show

  • SRG-APP-000097-NDM-000227

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco router must produce audit records containing information to establish where the events occurred.

    &lt;VulnDiscussion&gt;In order to compile an accurate risk assessment and provide forensic analysis, it is essential for security personnel to know...
    Rule Medium Severity
    Show

  • SRG-APP-000142-NDM-000245

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco router must be configured to be configured to prohibit the use of all unnecessary and nonsecure functions and services.

    &lt;VulnDiscussion&gt;Network devices are capable of providing a wide variety of functions and services. Some of the functions and services provide...
    Rule High Severity
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  • SRG-APP-000148-NDM-000346

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco router must be configured with only one local account to be used as the account of last resort in the event the authentication server is unavailable.

    &lt;VulnDiscussion&gt;Authentication for administrative (privileged level) access to the device is required at all times. An account can be created...
    Rule Medium Severity
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  • SRG-APP-000156-NDM-000250

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco router must be configured to authenticate NTP sources using authentication that is cryptographically based.

    &lt;VulnDiscussion&gt;If Network Time Protocol is not authenticated, an attacker can introduce a rogue NTP server. This rogue server can then be us...
    Rule Medium Severity
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  • The Cisco router must be configured to implement replay-resistant authentication mechanisms for network access to privileged accounts.

    &lt;VulnDiscussion&gt;A replay attack may enable an unauthorized user to gain access to the application. Authentication sessions between the authen...
    Rule Medium Severity
    Show

  • SRG-APP-000190-NDM-000267

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco router must be configured to terminate all network connections associated with device management after five minutes of inactivity.

    &lt;VulnDiscussion&gt;Terminating an idle session within a short time period reduces the window of opportunity for unauthorized personnel to take c...
    Rule High Severity
    Show

  • SRG-APP-000357-NDM-000293

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco router must be configured to allocate audit record storage capacity in accordance with organization-defined audit record storage requirements.

    &lt;VulnDiscussion&gt;In order to ensure network devices have a sufficient storage capacity in which to write the audit logs, they need to be able ...
    Rule Medium Severity
    Show

  • SRG-APP-000360-NDM-000295

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco router must be configured to generate an alert for all audit failure events.

    &lt;VulnDiscussion&gt;It is critical for the appropriate personnel to be aware if a system is at risk of failing to process audit logs as required....
    Rule Medium Severity
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  • SRG-APP-000373-NDM-000298

    <GroupDescription></GroupDescription>
    Group
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  • SRG-APP-000411-NDM-000330

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco router must be configured to synchronize its clock with the primary and secondary time sources using redundant authoritative time sources.

    &lt;VulnDiscussion&gt;The loss of connectivity to a particular authoritative time source will result in the loss of time synchronization (free-run ...
    Rule Medium Severity
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  • SRG-APP-000375-NDM-000300

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco router must record time stamps for audit records that meet a granularity of one second for a minimum degree of precision.

    &lt;VulnDiscussion&gt;Without sufficient granularity of time stamps, it is not possible to adequately determine the chronological order of records....
    Rule Medium Severity
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  • SRG-APP-000374-NDM-000299

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco router must be configured to record time stamps for log records that can be mapped to Coordinated Universal Time (UTC) or Greenwich Mean Time (GMT).

    &lt;VulnDiscussion&gt;If time stamps are not consistently applied and there is no common time reference, it is difficult to perform forensic analys...
    Rule Medium Severity
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  • SRG-APP-000395-NDM-000310

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco router must be configured to authenticate SNMP messages using a FIPS-validated Keyed-Hash Message Authentication Code (HMAC).

    &lt;VulnDiscussion&gt;Without authenticating devices, unidentified or unknown devices may be introduced, thereby facilitating malicious activity. B...
    Rule Medium Severity
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  • SRG-APP-000395-NDM-000310

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco router must be configured to encrypt SNMP messages using a FIPS 140-2 approved algorithm.

    &lt;VulnDiscussion&gt;Without the strong encryption that is provided by the SNMP Version 3 User-based Security Model (USM), an unauthorized user ca...
    Rule Medium Severity
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  • SRG-APP-000395-NDM-000347

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco router must be configured to use FIPS-validated Keyed-Hash Message Authentication Code (HMAC) to protect the integrity of remote maintenance sessions.

    &lt;VulnDiscussion&gt;Unapproved mechanisms that are used for authentication to the cryptographic module are not verified and therefore cannot be r...
    Rule High Severity
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  • SRG-APP-000412-NDM-000331

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco router must be configured to implement cryptographic mechanisms to protect the confidentiality of remote maintenance sessions.

    &lt;VulnDiscussion&gt;This requires the use of secure protocols instead of their unsecured counterparts, such as SSH instead of telnet, SCP instead...
    Rule High Severity
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  • SRG-APP-000515-NDM-000325

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco router must be configured to off-load log records onto a different system than the system being audited.

    &lt;VulnDiscussion&gt;Information stored in one location is vulnerable to accidental or incidental deletion or alteration. Off-loading is a common...
    Rule Medium Severity
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  • SRG-APP-000516-NDM-000336

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco router must be configured to use at least two authentication servers for the purpose of authenticating users prior to granting administrative access.

    &lt;VulnDiscussion&gt;Centralized management of user accounts and authentication increases the administrative access to the router. This control is...
    Rule High Severity
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  • SRG-APP-000516-NDM-000340

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco router must be configured to back up the configuration when changes occur.

    &lt;VulnDiscussion&gt;System-level information includes default and customized settings and security attributes, including ACLs that relate to the ...
    Rule Medium Severity
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  • SRG-APP-000516-NDM-000344

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco router must be configured to obtain its public key certificates from an appropriate certificate policy through an approved service provider.

    &lt;VulnDiscussion&gt;For user certificates, each organization obtains certificates from an approved, shared service provider, as required by OMB p...
    Rule Medium Severity
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  • SRG-APP-000516-NDM-000317

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco router must be configured to send log data to at least two syslog servers for the purpose of forwarding alerts to the administrators and the information system security officer (ISSO).

    &lt;VulnDiscussion&gt;The aggregation of log data kept on a syslog server can be used to detect attacks and trigger an alert to the appropriate sec...
    Rule High Severity
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