I - Mission Critical Classified
Rules and Groups employed by this XCCDF Profile
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SRG-NET-000088-NAC-000440
Group -
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. This is required for compliance with C2C Step 1.
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 ...Rule Medium Severity -
SRG-NET-000089-NAC-000450
Group -
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. This is required for compliance with C2C Step 1.
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 ...Rule Medium Severity -
SRG-NET-000512-NAC-002310
Group -
The Cisco ISE must perform continuous detection and tracking of endpoint devices attached to the network. This is required for compliance with C2C Step 1.
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 manage...Rule Medium Severity -
SRG-NET-000148-NAC-000620
Group -
The Cisco ISE must deny network connection for endpoints that cannot be authenticated using an approved method. This is required for compliance with C2C Step 4.
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 ...Rule Medium Severity -
SRG-NET-000343-NAC-001460
Group -
The Cisco ISE must authenticate all endpoint devices before establishing a connection and proceeding with posture assessment. This is required for compliance with C2C Step 4.
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 c...Rule Medium Severity -
SRG-NET-000343-NAC-001470
Group -
The Cisco ISE must be configured to dynamically apply restricted access of endpoints that are granted access using MAC Authentication Bypass (MAB). This is required for compliance with C2C Step 4.
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 disa...Rule Medium Severity -
SRG-NET-000550-NAC-002470
Group -
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. This is required for compliance with C2C Step 1.
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 t...Rule Medium Severity -
SRG-NET-000151-NAC-000630
Group -
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. This is required for compliance with C2C Step 1.
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 bidirectiona...Rule Medium Severity -
SRG-NET-000512-NAC-002310
Group -
The Cisco ISE must enforce posture status assessment for posture required clients defined in the NAC System Security Plan (SSP). This is required for compliance with C2C Step 3.
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 client...Rule High Severity -
SRG-NET-000512-NAC-002310
Group -
The Cisco ISE must have a posture policy for posture required clients defined in the NAC System Security Plan (SSP). This is required for compliance with C2C Step 2.
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...Rule High Severity
Node 2
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