Cisco ISE NAC Security Technical Implementation Guide

Description

This Security Technical Implementation Guide is published as a tool to improve the security of Department of Defense (DoD) information systems. The requirements are derived from the National Institute of Standards and Technology (NIST) 800-53 and related documents. Comments or proposed revisions to this document should be sent via email to the following address: [email protected]

Details

Version / Release: V1R1

Published: 2021-04-14

Updated At: 2021-05-02 20:53:57

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Drop CKL or SCAP (XCCDF) results here.

    Vuln Rule Version CCI Severity Title Description Status Finding Details Comments
    SV-242575r714035_rule CSCO-NC-000010 CCI-000068 HIGH The Cisco ISE must use TLS 1.2, at a minimum, to protect the confidentiality of information passed between the endpoint agent and the Cisco ISE for the purposes of client posture assessment. The agent may pass information about the endpoint to the Cisco ISE, which may be sensitive. Using older unauthorized versions or incorrectly configuring protocol negotiation makes the gateway vulnerable to known and unknown attacks that exploit vulnerabil
    SV-242576r714038_rule CSCO-NC-000020 CCI-000213 HIGH The Cisco ISE must enforce approved access by employing authorization policies with specific attributes; such as resource groups, device type, certificate attributes, or any other attributes that are specific to a group of endpoints, and/or mission conditions as defined in the site's Cisco ISE System Security Plan (SSP). Successful authentication must not automatically give an entity access to an asset or security boundary. The lack of authorization-based access control could result in the unauthorized network access. Configuration policy sets with specific authorization
    SV-242577r714041_rule CSCO-NC-000030 CCI-000213 HIGH The Cisco ISE must be configured to profile endpoints connecting to the network. It is possible for endpoints to be manually added to an incorrect endpoint identity group. The endpoint policy can be dynamically set through profiling. If the endpoint group is statically set but the endpoint policy is set to dynamic, then it is possible
    SV-242578r714044_rule CSCO-NC-000040 CCI-000213 HIGH The Cisco ISE must verify host-based firewall software is running on posture required clients defined in the NAC System Security Plan (SSP) prior to granting trusted network access. Automated policy assessments must reflect the organization's current security policy so entry control decisions will happen only where remote endpoints meet the organization's security requirements. If the remote endpoints are allowed to connect to the or
    SV-242579r714047_rule CSCO-NC-000050 CCI-000213 HIGH The Cisco ISE must verify anti-malware software is installed and up to date on posture required clients defined in the NAC System Security Plan (SSP) prior to granting trusted network access. New viruses and malware are consistently being discovered. If the host-based security software is not current then it will not be able to defend against exploits that have been previously discovered.
    SV-242580r714050_rule CSCO-NC-000060 CCI-000213 HIGH The Cisco ISE must verify host-based IDS/IPS software is authorized and running on posture required clients defined in the NAC System Security Plan (SSP) prior to granting trusted network access. Automated policy assessments must reflect the organization's current security policy so entry control decisions will happen only where remote endpoints meet the organization's security requirements. If the remote endpoints are allowed to connect to the or
    SV-242581r714053_rule CSCO-NC-000070 CCI-000213 MEDIUM For endpoints that require automated remediation, the Cisco ISE must be configured to redirect endpoints to a logically separate VLAN for remediation services. Automated and manual procedures for remediation for critical security updates will be managed differently. Continuing to assess and remediate endpoints with risks that could endanger the network could impact network usage for all users. This isolation pre
    SV-242582r714056_rule CSCO-NC-000080 CCI-000213 LOW The Cisco ISE must be configured to notify the user before proceeding with remediation of the user's endpoint device when automated remediation is used. Notification will let the user know that installation is in progress and may take a while. This notice may deter the user from disconnecting and retrying the connection before the remediation is completed. Premature disconnections may increase network dem
    SV-242583r714059_rule CSCO-NC-000090 CCI-000213 MEDIUM The Cisco ISE must be configured so that all endpoints that are allowed to bypass policy assessment are approved by the Information System Security Manager (ISSM) and documented in the System Security Plan (SSP). Connections that bypass established security controls should be only in cases of administrative need. These procedures and use cases must be approved by the Information System Security Manager (ISSM).
    SV-242584r714062_rule CSCO-NC-000100 CCI-000213 MEDIUM The Cisco ISE must send an alert to the Information System Security Manager (ISSM) and System Administrator (SA), at a minimum, when security issues are found that put the network at risk. Trusted computing should require authentication and authorization of both the user's identity and the identity of the computing device. An authorized user may be accessing the network remotely from a computer that does not meet DoD standards. This may com
    SV-242585r714065_rule CSCO-NC-000110 CCI-000213 MEDIUM When endpoints fail the policy assessment, the Cisco ISE must create a record with sufficient detail suitable for forwarding to a remediation server for automated remediation or sending to the user for manual remediation. Failing the NAC assessment means that an unauthorized machine has attempted to access the secure network. Without generating log records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate
    SV-242586r714068_rule CSCO-NC-000120 CCI-000213 MEDIUM The Cisco ISE must place client machines on the blacklist and terminate the agent connection when critical security issues are found that put the network at risk. Note: The Agent has a TCP connect to ISE when it checks in. This TCP session does not give access to the network. Blacklisting the item should remove the access. When to blacklist an item could be another line item. The Cisco ISE must terminate access to blacklisted endpoints that have been found to have critical security issues. Since the Cisco ISE devices and servers should have no legitimate reason for communicating with other devices outside of the assessment solution, any direct communication with unrelated hosts would be suspect traffic.
    SV-242587r714071_rule CSCO-NC-000130 CCI-000213 MEDIUM The Cisco ISE must be configured so client machines do not communicate with other network devices in the DMZ or subnet except as needed to perform an access client assessment or to identify themselves. Devices not compliant with DoD secure configuration policies are vulnerable to attack. Allowing these systems to connect presents a danger to the enclave. This requirement gives the option to configure for automated remediation and/or manual remediation.
    SV-242588r714074_rule CSCO-NC-000140 CCI-002179 MEDIUM The Cisco ISE must deny or restrict access for endpoints that fail required posture checks. Devices, which do not meet minimum-security configuration requirements, pose a risk to the DoD network and information assets. Endpoint devices must be disconnected or given limited access as designated by the approval authority and system owner if the d
    SV-242589r714077_rule CSCO-NC-000150 CCI-000172 MEDIUM The Cisco ISE must generate a log record when an endpoint fails authentication. Failing the Cisco ISE assessment means that an unauthorized machine has attempted to access the secure network. Without generating log records that are specific to the security and mission needs of the organization, it would be difficult to establish, cor
    SV-242590r714080_rule CSCO-NC-000160 CCI-000172 MEDIUM The Cisco ISE must generate a log record when the client machine fails posture assessment because required security software is missing or has been deleted. Failing the Cisco ISE assessment means an unauthorized machine has attempted to access the secure network. Without generating log records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlat
    SV-242591r714083_rule CSCO-NC-000170 CCI-000172 MEDIUM The Cisco ISE must send an alert to the system administrator, at a minimum, when endpoints fail the policy assessment checks for organization-defined infractions. Failing the Cisco ISE assessment, means that an unauthorized machine has attempted to access the secure network. Without generating log records that are specific to the security and mission needs of the organization, it would be difficult to establish, co
    SV-242592r714086_rule CSCO-NC-000180 CCI-001844 MEDIUM The Cisco ISE must be configured to log records onto a centralized events server. Without the ability to centrally manage the content captured in the log records, identification, troubleshooting, and correlation of suspicious behavior would be difficult and could lead to a delayed or incomplete analysis of an ongoing attack. The DoD r
    SV-242593r714089_rule CSCO-NC-000190 CCI-001851 MEDIUM The Cisco ISE must off-load log records onto a different system. Information stored in one location is vulnerable to accidental or incidental deletion or alteration. Off-loading is a common process in information systems with limited audit storage capacity. This does not apply to audit logs generated on behalf of the
    SV-242594r714092_rule CSCO-NC-000200 CCI-001858 MEDIUM The Cisco ISE must generate a critical alert to be sent to the ISSO and SA (at a minimum) in the event of an audit processing failure. It is critical for the appropriate personnel to be aware if a system is at risk of failing to process audit logs as required. Without an alert, security personnel may be unaware of an impending failure of the audit capability and system operation may be a
    SV-242595r714095_rule CSCO-NC-000210 CCI-001858 MEDIUM The Cisco ISE must provide an alert to, at a minimum, the SA and ISSO of all audit failure events where the detection and/or prevention function is unable to write events to either local storage or the centralized server. Without an alert, security personnel may be unaware of an impending failure of the audit capability and system operation may be adversely affected. Alerts provide organizations with urgent messages. Alerts provide these messages immediately (i.e., the ti
    SV-242596r714098_rule CSCO-NC-000220 CCI-001861 MEDIUM The Cisco ISE must be configured with a secondary log server in case the primary log is unreachable. It is critical for the appropriate personnel to be aware if a system is at risk of failing to process audit logs as required. Without this notification, the security personnel may be unaware of an impending failure of the audit capability and system opera
    SV-242597r714101_rule CSCO-NC-000230 CCI-000139 MEDIUM The Cisco ISE must generate a critical alert to be sent to the ISSO and SA (at a minimum) if it is unable to communicate with the central event log. It is critical for the appropriate personnel to be aware if a system is at risk of failing to process audit logs as required. Without this notification, the security personnel may be unaware of an impending failure of the audit capability and system opera
    SV-242598r714104_rule CSCO-NC-000240 CCI-000140 MEDIUM The Cisco ISE must continue to queue traffic log records locally when communication with the central log server is lost and there is an audit archival failure. It is critical that when the network element is at risk of failing to process traffic logs as required, it takes action to mitigate the failure. Audit processing failures include software/hardware errors, failures in the audit capturing mechanisms, and au
    SV-242599r714107_rule CSCO-NC-000250 CCI-000366 MEDIUM The Cisco ISE must perform continuous detection and tracking of endpoint devices attached to the network. Continuous scanning capabilities on the Cisco ISE provide visibility of devices that are connected to the switch ports. The Cisco ISE continuously scans networks and monitors the activity of managed and unmanaged devices, which can be personally owned or
    SV-242600r714110_rule CSCO-NC-000260 CCI-000778 MEDIUM The Cisco ISE must deny network connection for endpoints that cannot be authenticated using an approved method. Without identifying devices, unidentified or unknown devices may be introduced, thereby facilitating malicious activity. Identification failure does not need to result in connection termination or preclude compliance assessment. This is particularly true
    SV-242601r714113_rule CSCO-NC-000270 CCI-001958 MEDIUM The Cisco ISE must authenticate all endpoint devices before establishing a connection and proceeding with posture assessment. Without authenticating devices, unidentified or unknown devices may be introduced, thereby facilitating malicious activity. However, failure to authenticate an endpoint does not need to result in connection termination or preclude compliance assessment. T
    SV-242602r714116_rule CSCO-NC-000280 CCI-001958 MEDIUM The Cisco ISE must be configured to dynamically apply restricted access of endpoints that are granted access using MAC Authentication Bypass (MAB). MAB can be defeated by spoofing the MAC address of a valid device. MAB enables port-based access control using the MAC address of the endpoint. A MAB-enabled port can be dynamically enabled or disabled based on the MAC address of the device that connects
    SV-242603r714119_rule CSCO-NC-000290 CCI-001967 MEDIUM Before establishing a connection with a Network Time Protocol (NTP) server, the Cisco ISE must authenticate using a bidirectional, cryptographically based authentication method that uses a FIPS-validated Advanced Encryption Standard (AES) cipher block algorithm to authenticate with the NTP server. If the NTP server is not authenticated, an attacker can introduce a rogue NTP server. This rogue server can then be used to send incorrect time information to network devices, which will make log timestamps inaccurate and affect scheduled actions. NTP aut
    SV-242604r714122_rule CSCO-NC-000300 CCI-001967 MEDIUM Before establishing a local, remote, and/or network connection with any endpoint device, the Cisco ISE must use a bidirectional authentication mechanism configured with a FIPS-validated Advanced Encryption Standard (AES) cipher block algorithm to authenticate with the endpoint device. Bidirectional authentication provides stronger safeguards to validate the identity of other devices for connections that are of greater risk. Currently, DoD requires the use of AES for bidirectional authentication since it is the only FIPS-validated AES c
    SV-242605r714125_rule CSCO-NC-000310 CCI-000366 HIGH The Cisco ISE must enforce posture status assessment for posture retired clients defined in the NAC System Security Plan (SSP). Posture assessments can reduce the risk that clients impose on networks by restricting or preventing access of noncompliant clients. If the posture assessment is not enforced, then access of clients not complying is not restricted allowing the risk of vul
    SV-242606r714128_rule CSCO-NC-000320 CCI-000366 HIGH The Cisco ISE must have a posture policy for posture required clients defined in the NAC System Security Plan (SSP). Posture assessments can reduce the risk that clients impose on networks. The posture policy is the function that can link requirements to applicable clients. Multiple requirements can be associated with a single policy. However, multiple polices can also