HYCU for Nutanix Security Technical Implementation Guide
Rules, Groups, and Values defined within the XCCDF Benchmark
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The network device must implement replay-resistant authentication mechanisms for network access to privileged accounts.
A replay attack may enable an unauthorized user to gain access to the application. Authentication sessions between the authenticator and the application validating the user credentials must not be ...Rule Medium Severity -
SRG-APP-000166-NDM-000254
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SRG-APP-000164-NDM-000252
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The network device must enforce a minimum 15-character password length.
Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. Password length is one factor of several that helps to d...Rule Medium Severity -
SRG-APP-000170-NDM-000329
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The HYCU server must require that when a password is changed, the characters are changed in at least eight of the positions within the password.
If the application allows the user to consecutively reuse extensive portions of passwords, this increases the chances of password compromise by increasing the window of opportunity for attempts at ...Rule Medium Severity -
SRG-APP-000080-NDM-000345
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The HYCU VM console must not have any default manufacturer passwords when deployed.
Virtual Machines not protected with strong password schemes provide the opportunity for anyone to crack the password and gain access to the device, which can result in loss of availability, confide...Rule Medium Severity -
SRG-APP-000400-NDM-000313
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SRG-APP-000179-NDM-000265
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The HYCU server must use FIPS-validated algorithms for authentication to a cryptographic module and Keyed-Hash Message Authentication Code (HMAC) to protect the integrity and confidentiality of remote maintenance sessions.
Unapproved algorithms used by the cryptographic module are not validated and therefore cannot be relied on to provide confidentiality or integrity, and DoD data may be compromised. Remote maintena...Rule High Severity -
SRG-APP-000190-NDM-000267
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The HYCU server and Web UI must terminate all network connections associated with a device management session at the end of the session, or the session must be terminated after 15 minutes of inactivity except to fulfill documented and validated mission requirements.
Terminating an idle session within a short time period reduces the window of opportunity for unauthorized personnel to take control of a management session enabled on the console or console port th...Rule High Severity -
SRG-APP-000224-NDM-000270
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The network device must generate unique session identifiers using a FIPS 140-2 approved random number generator.
Sequentially generated session IDs can be easily guessed by an attacker. Employing the concept of randomness in the generation of unique session identifiers helps to protect against brute-force att...Rule Medium Severity -
SRG-APP-000516-NDM-000350
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The HYCU Web UI must be configured to send log data to a central log server for forwarding alerts to the administrators and the ISSO.
The aggregation of log data kept on a syslog server can be used to detect attacks and trigger an alert to the appropriate security personnel. The stored log data can used to detect weaknesses in se...Rule High Severity -
SRG-APP-000001-NDM-000200
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The HYCU 4.1 application and server must limit the number of concurrent sessions to an organization-defined number for each administrator account and/or administrator account type.
Device management includes the ability to control the number of administrators and management sessions that manage a device. Limiting the number of allowed administrators and sessions per administr...Rule Medium Severity -
The HYCU 4.1 application and server must initiate a session lock after a 15-minute period of inactivity.
A session lock is a temporary network device or administrator-initiated action taken when the administrator stops work but does not log out of the network device. Rather than relying on the user to...Rule Medium Severity -
The HYCU 4.1 Application must enforce the assigned privilege level for each administrator and authorizations for access to all commands relative to the privilege level in accordance with applicable policy for the device.
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems must be properly configured to incorporate ...Rule High Severity -
The HYCU VM console must be configured to enforce the limit of three consecutive invalid logon attempts, after which time it must block any logon attempt for 15 minutes.
By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-forcing, is reduced.Rule Medium Severity -
The HYCU VM console must retain the Standard Mandatory DoD Notice and Consent Banner on the screen until the administrator acknowledges the usage conditions and takes explicit actions to log on for further access.
The banner must be acknowledged by the administrator prior to the device allowing the administrator access to the network device. This provides assurance that the administrator has seen the message...Rule Medium Severity -
The HYCU VM/server must be configured to disable SSH.
It is detrimental for applications to provide functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain un...Rule Medium Severity -
The HYCU server must generate audit records for privileged activities or other system-level access.
Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an in...Rule Medium Severity -
The HYCU server must produce audit records containing information to establish when events occurred, where events occurred, the source of the event, the outcome of the event, and identity of any individual or process associated with the event.
It is essential for security personnel to know what is being done, what was attempted, where it was done, when it was done, and by whom it was done in order to compile an accurate risk assessment. ...Rule Medium Severity -
The HYCU server must allocate audit record storage capacity in accordance with organization-defined audit record storage requirements.
To ensure network devices have a sufficient storage capacity in which to write the audit logs, they must be able to allocate audit record storage capacity. The task of allocating audit record stora...Rule Medium Severity -
The HYCU server must protect audit information from unauthorized deletion.
Audit information includes all information (e.g., audit records, audit settings, and audit reports) needed to successfully audit information system activity. If audit data were to become compromis...Rule Medium Severity -
The HYCU server must protect audit tools from unauthorized access, modification, and deletion.
Protecting audit data also includes identifying and protecting the tools used to view and manipulate log data. Therefore, protecting audit tools is necessary to prevent unauthorized operation on au...Rule Medium Severity -
The HYCU server must authenticate Network Time Protocol sources using authentication that is cryptographically based.
If Network Time Protocol 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 mak...Rule Medium Severity -
The HYCU server must enforce password complexity by requiring that at least one uppercase character be used.
Use of a complex passwords helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisti...Rule Medium Severity -
The HYCU server must prohibit the use of cached authenticators after an organization-defined time period.
Some authentication implementations can be configured to use cached authenticators. If cached authentication information is out-of-date, the validity of the authentication information may be quest...Rule Medium Severity
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