Finding ID |
Severity |
Title |
Description |
V-233340
|
High |
When connecting with endpoints, Forescout must be configured to use FIPS 140-2/3 validated algorithms for encryption processes and communications. This is required for compliance with C2C Step 1. |
A certificate's certification path is the path from the end entity certificate to a trusted root certification authority (CA). Certification path validation is necessary for a relying party to make an informed decision regarding acceptance of an end entity certificate.
NAC must be configured for only Certificate Signing. The NAC... |
V-233318
|
High |
Forescout must place client machines on a blacklist or terminate network communications on devices when critical security issues are found that put the network at risk. This is required for compliance with C2C Step 4. |
Devices that are found to have critical security issues place the network at risk if they are allowed to continue communications. Policy actions should be in place to terminate or restrict network communication or place the suspicious machine on a blacklist. |
V-233315
|
High |
Forescout appliance must not be configured to implement a DHCP layer 3 method for separation or device authorization. This is required for compliance with C2C Step 2. |
Using DHCP, an internal rogue device can still bypass the authentication process, regardless of the policy flow. Older version of the ForeScout may have a setting to support DHCP for NAC authorization. This capability should not be used.
The DHCP Classifier Plugin allows Forescout to view and use DHCP properties... |
V-233314
|
High |
Forescout must be configured so that all client machines are assessed by Forescout with exceptions that are allowed to bypass Forescout based on account or account type, as approved by the information system security manager (ISSM) and documented in the System Security Plan (SSP). This is required for compliance with C2C Step 1. |
The NAC gateway provides the policy enforcement allowing or denying the endpoint to the network. Unauthorized endpoints that bypass this control present a risk to the organization's data and network.
The focus of this requirement is on identification, documentation, and approval of devices that will bypass the NAC. This is... |
V-233312
|
High |
If a device requesting access fails Forescout policy assessment, Forescout must communicate with other components and the switch to either terminate the session or isolate the device from the trusted network for remediation. This is required for compliance with C2C Step 3. |
Endpoints with identified security flaws and weaknesses endanger the network and other devices on it. Isolation or termination prevents traffic from flowing with traffic from endpoints that have been fully assessed and authorized. |
V-233311
|
High |
For endpoints that require automated remediation, Forescout must be configured to logically separate endpoints from the trusted network traffic during remediation. This is required for compliance with C2C Step 4. |
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 prevents traffic from flowing with traffic from endpoints that have been fully assessed and... |
V-233310
|
High |
Endpoint policy assessment must proceed after the endpoint attempting access has been identified using an approved identification method such as IP address. This is required for compliance with C2C Step 2. |
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 organization's network without passing minimum-security controls, they become a threat to the entire network.
Organizational... |
V-233309
|
High |
Forescout must enforce approved access by employing admissions assessment filters that include, at a minimum, device attributes such as type, IP address, resource group, and/or mission conditions as defined in Forescout System Security Plan (SSP). This is required for compliance with C2C Step 4. |
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 immediate compromise and unauthorized access to sensitive information.
Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific... |
V-233339
|
Medium |
Forescout 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 bidirectional authentication since it is the only FIPS-validated AES cipher block algorithm.
Because of the challenges of applying this requirement on a large... |
V-233338
|
Medium |
Forescout 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 preclude compliance assessment. This is particularly true for unmanaged systems or when the NAC is performing network discovery. |
V-233337
|
Medium |
Forescout 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 NAC provide visibility of devices that are connected to the switch ports. The NAC continuously scans networks and monitors the activity of managed and unmanaged devices, which can be personally owned or rogue endpoints. Because many of today's small devices do not include agents, an... |
V-233336
|
Medium |
Forescout must be configured with a secondary log server, in case the primary log is unreachable. 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 impending failure of the audit capability and system operation may be adversely affected.
Audit processing... |
V-233335
|
Medium |
Forescout must generate a log record when the client machine fails policy assessment because required security software is missing or has been deleted. This is required for compliance with C2C Step 1. |
Generating log records with regard to modules and policies is an important part of maintaining proper cyber hygiene. Keeping and maintaining the logs helps to establish, correlate, and investigate the events relating to an incident, or identify those responsible for one. |
V-233334
|
Medium |
Communications between Forescout endpoint agent and the switch must transmit access authorization information via a protected path using a cryptographic mechanism. This is required for compliance with C2C Step 1. |
Forescout solution assesses the compliance posture of each client and returns an access decision based on configured security policy. The communications associated with this traffic must be protected from alteration and spoofing attacks so unauthorized devices do not gain access to the network. |
V-233332
|
Medium |
Forescout must use TLS 1.2, at a minimum, to protect the confidentiality of information passed between the endpoint agent and Forescout for the purposes of client posture assessment. This is required for compliance with C2C Step 1. |
Using older unauthorized versions or incorrectly configuring protocol negotiation makes the gateway vulnerable to known and unknown attacks that exploit vulnerabilities in this protocol. |
V-233331
|
Medium |
For TLS connections, Forescout must automatically terminate the session when a client certificate is requested and the client does not have a suitable certificate. This is required for compliance with C2C Step 1. |
In accordance with NIST SP 800-52, the TLS server must terminate the connection with a fatal “handshake failure” alert when a client certificate is requested and the client does not have a suitable certificate.
During the TLS handshake negotiation, a "client certificate request" that includes a list of the types... |
V-233330
|
Medium |
Forescout switch module must only allow a maximum of one registered MAC address per access port. This is required for compliance with C2C Step 4. |
Limiting the number of registered MAC addresses on a switch access port can help prevent a CAM table overflow attack. This type of attack lets an attacker exploit the hardware and memory limitations of a switch. If there are enough entries stored in a CAM table before the expiration of... |
V-233329
|
Medium |
Forescout must configure TCP for the syslog protocol to allow for detection by the central event server if communications is lost. 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 impending failure of the audit capability and system operation may be adversely affected.
Note that... |
V-233328
|
Medium |
Forescout must reveal error messages only to the Information System Security Officer (ISSO), Information System Security Manager (ISSM), and System Administrator (SA). This is required for compliance with C2C Step 1. |
Ensuring the proper amount of information is provided to the Security Management staff is imperative to ensure role based access control. Only those individuals that need to know about a security error of an application need to be notified of the error. |
V-233327
|
Medium |
Forescout must be configured to apply dynamic ACLs that restrict the use of ports when non-entity endpoints are connected using MAC Authentication Bypass (MAB). This is required for compliance with C2C Step 4. |
MAB is only one way of connecting non-entity endpoints, and can be defeated by spoofing the MAC address of an assumed authorized device. By adding the device to the MAR, the device can then gain access to the network.
NPE devices that can support PKI or an allowed authentication type... |
V-233326
|
Medium |
Forescout must authenticate all endpoint devices before establishing a connection and proceeding with posture assessment. This is required for compliance with C2C Step 4. |
Authenticating all devices as they connect to the network is the baseline of a good security solution. This is especially important prior to posture assessment to ensure authorized devices are online and have the proper posture prior to accessing the production network.
Device authentication is a solution enabling an organization... |
V-233325
|
Medium |
Forescout must generate a critical alert to be sent to the Information System Security Officer (ISSO) and Systems Administrator (SA) (at a minimum) in the event of an audit processing failure. This is required for compliance with C2C Step 1. |
Ensuring that a security solution alerts in the event of misconfiguration or error is imperative to ensuring that proper auditing is being conducted. Having the ability to immediately notify an administrator when this auditing fails allows for a quick response and real-time remediation. |
V-233324
|
Medium |
Forescout must off-load log records onto a different system. This is required for compliance with C2C Step 1. |
Having a separate, secure location for log records is essential to the preservation of logs as required by policy. |
V-233322
|
Medium |
Forescout must deny or restrict access for endpoints that fail critical endpoint security checks. This is required for compliance with C2C Step 4. |
Devices that 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 device fails the authentication or security assessment. The user will be presented... |
V-233321
|
Medium |
Forescout must enforce the revocation of endpoint access authorizations at the next compliance assessment interval based on changes to the compliance assessment security policy. This is required for compliance with C2C Step 4. |
This requirement gives the option to configure for automated remediation and/or manual remediation. A detailed record must be passed to the remediation server for action. Alternatively, the details can be passed in a notice to the user for action. The device status will be updated on the network access server/authentication... |
V-233320
|
Medium |
Forescout must enforce the revocation of endpoint access authorizations when devices are removed from an authorization group. This is required for compliance with C2C Step 4. |
Ensuring the conditions that are configured in policy have proper time limits set to reflect changes will allow for proper access. This will help to validate that authorized individuals have proper access. |
V-233319
|
Medium |
Forescout must be configured so client machines do not communicate with other network devices in the DMZ or subnet except as needed to perform a client assessment or to identify itself. This is required for compliance with C2C Step 2. |
Devices not compliant with DOD secure configuration policies are vulnerable to attack. While endpoints are undergoing NAC authorization assessment, they must communicate only with the NAC. These devices should not communicate with other hosts in any DMZ or other network segments. |
V-233317
|
Medium |
When devices fail the policy assessment, Forescout 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. This is required for compliance with C2C Step 3. |
Notifications sent to the user and/or network administrator informing them of remediation requirements will ensure that action is taken. |
V-233313
|
Medium |
Forescout must be configured to notify the user before proceeding with remediation of the user's endpoint device when automated remediation is used. This is required for compliance with C2C Step 3. |
Connections that bypass established security controls should be allowed only in cases of administrative need. These procedures and use cases must be approved by the Information System Security Manager (ISSM).
This setting may be sent from the assessment server, a central server, or from the remediation server.
Verify the user... |