VMware Workspace ONE UEM Security Technical Implementation Guide

A session time-out lock is a temporary action taken when a user (MDM system administrator) stops work and moves away from the immediate physical vicinity of the information system but does not log out because of the temporary nature of the absence. Rather than relying on the user to manually lock their application session prior to vacating the vicinity, applications need to be able to identify when a user's application session has idled and take action to initiate the session lock. The session lock is implemented at the point where session activity can be determined and/or controlled. This is typically at the operating system level and results in a system lock, but may be at the application level where the application interface window is secured instead. SFR ID: FMT_SMF.1.1(2) c.8

It is critical that only authorized certificates are used for key activities such as code signing for system software updates, code signing for integrity verification, and policy signing. Otherwise, there is no assurance that a malicious actor has not inserted itself in the process of packaging the code or policy. For example, messages signed with an invalid certificate may contain links to malware, which could lead to the installation or distribution of that malware on DoD information systems, leading to compromise of DoD sensitive information and other attacks. Therefore, the Workspace ONE UEM server must have the capability to configure the enterprise certificate. SFR ID: FMT_SMF.1.1(2) c.8, FMT_POL_EXT.1.1

Audit logs enable monitoring of security-relevant events and subsequent forensics when breaches occur. Since the Workspace ONE UEM server has limited capability to store mobile device log files and perform analysis and reporting of mobile device log files, the Workspace ONE UEM server must have the capability to transfer log files to an audit log management server. SFR ID: FMT_SMF.1.1(2) c.8, FAU_STG_EXT.1.1(1)

Note: The advisory notice and consent warning message is not required if the general purpose OS or network device displays an advisory notice and consent warning message when the administrator logs on to the general purpose OS or network device prior to accessing the Workspace ONE UEM server or Workspace ONE UEM server platform. Before granting access to the system, the Workspace ONE UEM server/server platform is required to display the DoD-approved system use notification message or banner that provides privacy and security notices consistent with applicable federal laws, Executive Orders, directives, policies, regulations, standards, and guidance. This ensures the legal requirements for auditing and monitoring are met. The approved DoD text must be used as specified in the KS referenced in DoDI 8500.01. The non-bracketed text below must be used without any changes as the warning banner. [A. Use this banner for desktops, laptops, and other devices accommodating banners of 1300 characters. The banner shall be implemented as a click-through banner at logon (to the extent permitted by the operating system), meaning it prevents further activity on the information system unless and until the user executes a positive action to manifest agreement by clicking on a box indicating “OK.”] You are accessing a U.S. Government (USG) Information System (IS) that is provided for USG-authorized use only. By using this IS (which includes any device attached to this IS), you consent to the following conditions: -The USG routinely intercepts and monitors communications on this IS for purposes including, but not limited to, penetration testing, COMSEC monitoring, network operations and defense, personnel misconduct (PM), law enforcement (LE), and counterintelligence (CI) investigations. -At any time, the USG may inspect and seize data stored on this IS. -Communications using, or data stored on, this IS are not private, are subject to routine monitoring, interception, and search, and may be disclosed or used for any USG-authorized purpose. -This IS includes security measures (e.g., authentication and access controls) to protect USG interests--not for your personal benefit or privacy. -Notwithstanding the above, using this IS does not constitute consent to PM, LE or CI investigative searching or monitoring of the content of privileged communications, or work product, related to personal representation or services by attorneys, psychotherapists, or clergy, and their assistants. Such communications and work product are private and confidential. See User Agreement for details. SFR ID: FMT_SMF.1.1(2) c.2

Key security-related status attributes must be queried frequently so the Workspace ONE UEM server can report status of devices under management to the administrator and management. The periodicity of these queries must be configured to an acceptable timeframe. Six hours or less is considered acceptable for normal operations. SFR ID: FMT_SMF.1.1(2) c.3

Having several administrative roles for the Workspace ONE UEM server supports separation of duties. This allows administrator-level privileges to be granted granularly, such as giving application management privileges to one group and security policy privileges to another group. This helps prevent administrators from intentionally or inadvertently altering other settings and configuration, which they may not understand or approve of, that can weaken overall security and increase the risk of compromise. - Server primary administrator: Responsible for server installation, initial configuration, and maintenance functions. Responsible for the setup and maintenance of security configuration administrator and auditor accounts. Responsible for the maintenance of applications in the MAS. - Security configuration administrator: Responsible for security configuration of the server, defining device user groups, setup and maintenance of device user group administrator accounts, and defining privileges of device user group administrators. - Device user group administrator: Responsible for maintenance of mobile device accounts, including setup, change of account configurations, and account deletion. Responsible for defining to which apps user groups or individual users have access in the MAS. Can only perform administrative functions assigned by the security configuration administrator. - Auditor: Responsible for reviewing and maintaining server and mobile device audit logs. SFR ID: FMT_SMR.1.1(1)

A comprehensive account management process that includes automation helps to ensure the accounts designated as requiring attention are consistently and promptly addressed. If an attacker compromises an account, the entire Workspace ONE UEM server infrastructure is at risk. Providing automated support functions for the management of accounts will ensure only active accounts will be granted access with the proper authorization levels. These objectives are best achieved by configuring the Workspace ONE UEM server to leverage an enterprise authentication mechanism (e.g., Microsoft Active Directory Kerberos). SFR ID: FIA

A comprehensive account management process that includes automation helps to ensure the accounts designated as requiring attention are consistently and promptly addressed. If an attacker compromises an account, the entire Workspace ONE UEM server infrastructure is at risk. Providing automated support functions for the management of accounts will ensure only active accounts will be granted access with the proper authorization levels. These objectives are best achieved by configuring the Workspace ONE UEM server to leverage an enterprise authentication mechanism (e.g., Microsoft Active Directory Kerberos). SFR ID: FIA

Most information systems are capable of providing a wide variety of functions and services. Some of the functions and services provided by default may not be necessary to support essential organizational operations. Unneeded services and processes provide additional threat vectors and avenues of attack to the information system. The MDM server is a critical component of the mobility architecture and must be configured to enable only those ports, protocols, and services (PPS) necessary to support functionality. All others must be expressly disabled or removed. A DoD-approved firewall implements the required network restrictions. A host-based firewall is appropriate where the MDM server runs on a standalone platform. Network firewalls or other architectures may be preferred where the MDM server runs in a cloud or virtualized solution. Satisfies: SRG-APP-000142 SFR ID: FMT_SMF.1.1(2) b

Most information systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations. Since MDM server is a critical component of the mobility architecture and must be configured to enable only those ports, protocols, and services (PPS) necessary to support functionality, all others must be expressly disabled or removed. A firewall installed on the MDM server provides a protection mechanism to ensure unwanted service requests do not reach the MDM server and outbound traffic is limited to only MDM server functionality. Satisfies: SRG-APP-000142 SFR ID: FMT_SMF.1.1(2) b

All ports, protocols, and services used on DoD networks must be approved and registered via the DoD PPSM process. This is to ensure that a risk assessment has been completed before a new port, protocol, or service is configured on a DoD network and has been approved by proper DoD authorities. Otherwise, the new port, protocol, or service could cause a vulnerability to the DoD network, which could be exploited by an adversary. Satisfies: SRG-APP-000142 SFR ID: FMT_SMF.1.1(2) b

A comprehensive account management process that includes automation helps to ensure the accounts designated as requiring attention are consistently and promptly addressed. If an attacker compromises an account, the entire MDM server infrastructure is at risk. Providing automated support functions for the management of accounts will ensure only active accounts will be granted access with the proper authorization levels. These objectives are best achieved by configuring the MDM server to leverage an enterprise authentication mechanism (e.g., Microsoft Active Directory Kerberos). Satisfies: SRG-APP-000148 SFR ID: FMT_SMF.1.1(2) b / IA-5(1)(a)

Audit logs and alerts enable monitoring of security-relevant events and subsequent forensics when breaches occur. They help identify when the security posture of the device is not as expected. This enables the MDM administrator to take an appropriate remedial action. SFR ID: FMT_SMF_EXT.4.1