+MA-04 Nonlocal Maintenance
---+MA-04(01) Logging and Review
---+MA-04(03) Comparable Security and Sanitization
---+MA-04(04) Authentication and Separation of Maintenance Sessions
---+MA-04(05) Approvals and Notifications
---+MA-04(06) Cryptographic Protection
---+MA-04(07) Disconnect Verification

MA-04 Nonlocal Maintenance

Control

Approve and monitor nonlocal maintenance and diagnostic activities;
Allow the use of nonlocal maintenance and diagnostic tools only as consistent with organizational policy and documented in the security plan for the system;
Employ strong authentication in the establishment of nonlocal maintenance and diagnostic sessions;
Maintain records for nonlocal maintenance and diagnostic activities; and
Terminate session and network connections when nonlocal maintenance is completed.

Discussion

Nonlocal maintenance and diagnostic activities are conducted by individuals who communicate through either an external or internal network. Local maintenance and diagnostic activities are carried out by individuals who are physically present at the system location and not communicating across a network connection. Authentication techniques used to establish nonlocal maintenance and diagnostic sessions reflect the network access requirements in [IA-2](#ia-2) . Strong authentication requires authenticators that are resistant to replay attacks and employ multi-factor authentication. Strong authenticators include PKI where certificates are stored on a token protected by a password, passphrase, or biometric. Enforcing requirements in [MA-4](#ma-4) is accomplished, in part, by other controls. [SP 800-63B](#e59c5a7c-8b1f-49ca-8de0-6ee0882180ce) provides additional guidance on strong authentication and authenticators.

Assessment Objective

1. nonlocal maintenance and diagnostic activities are approved;
2. nonlocal maintenance and diagnostic activities are monitored;
1. the use of nonlocal maintenance and diagnostic tools are allowed only as consistent with organizational policy;
2. the use of nonlocal maintenance and diagnostic tools are documented in the security plan for the system;
strong authentication is employed in the establishment of nonlocal maintenance and diagnostic sessions;
records for nonlocal maintenance and diagnostic activities are maintained;
1. session connections are terminated when nonlocal maintenance is completed;
2. network connections are terminated when nonlocal maintenance is completed.

Assessment Method

Examine

Maintenance policy procedures addressing nonlocal system maintenance remote access policy remote access procedures system design documentation system configuration settings and associated documentation maintenance records records of remote access diagnostic records system security plan other relevant documents or records

Interview

Organizational personnel with system maintenance responsibilities organizational personnel with information security responsibilities system/network administrators

1. Přehled

Název	Standard
MA-04(01) Logging and Review	Control Log [Assignement: organization-defined audit events] for nonlocal maintenance and diagnostic sessions; and Review the audit records of the maintenance and diagnostic sessions to detect anomalous behavior. Discussion Audit logging for nonlocal maintenance is enforced by [AU-2](#au-2) . Audit events are defined in [AU-2a](#au-2_smt.a). Assessment Objective [Assignement: audit events] are logged for nonlocal maintenance sessions; [Assignement: audit events] are logged for nonlocal diagnostic sessions; the audit records of the maintenance sessions are reviewed to detect anomalous behavior; the audit records of the diagnostic sessions are reviewed to detect anomalous behavior. Assessment Method Examine Maintenance policy procedures addressing nonlocal system maintenance list of audit events system configuration settings and associated documentation maintenance records diagnostic records audit records reviews of maintenance and diagnostic session records system security plan other relevant documents or records Interview Organizational personnel with system maintenance responsibilities organizational personnel with information security responsibilities organizational personnel with audit and review responsibilities system/network administrators
MA-04(03) Comparable Security and Sanitization	Control Require that nonlocal maintenance and diagnostic services be performed from a system that implements a security capability comparable to the capability implemented on the system being serviced; or Remove the component to be serviced from the system prior to nonlocal maintenance or diagnostic services; sanitize the component (for organizational information); and after the service is performed, inspect and sanitize the component (for potentially malicious software) before reconnecting the component to the system. Discussion Comparable security capability on systems, diagnostic tools, and equipment providing maintenance services implies that the implemented controls on those systems, tools, and equipment are at least as comprehensive as the controls on the system being serviced. Assessment Objective nonlocal maintenance services are required to be performed from a system that implements a security capability comparable to the capability implemented on the system being serviced; nonlocal diagnostic services are required to be performed from a system that implements a security capability comparable to the capability implemented on the system being serviced; or the component to be serviced is removed from the system prior to nonlocal maintenance or diagnostic services; the component to be serviced is sanitized (for organizational information); the component is inspected and sanitized (for potentially malicious software) after the service is performed and before reconnecting the component to the system. Assessment Method Examine Maintenance policy procedures addressing nonlocal system maintenance service provider contracts and/or service-level agreements maintenance records inspection records audit records equipment sanitization records media sanitization records system security plan other relevant documents or records Interview Organizational personnel with system maintenance responsibilities system maintenance provider organizational personnel with information security responsibilities organizational personnel responsible for media sanitization system/network administrators
MA-04(04) Authentication and Separation of Maintenance Sessions	Control Protect nonlocal maintenance sessions by: Employing [Assignement: authenticators that are replay resistant] ; and Separating the maintenance sessions from other network sessions with the system by either: Physically separated communications paths; or Logically separated communications paths. Discussion Communications paths can be logically separated using encryption. Assessment Objective nonlocal maintenance sessions are protected by employing [Assignement: authenticators that are replay resistant]; nonlocal maintenance sessions are protected by separating maintenance sessions from other network sessions with the system by physically separated communication paths; or nonlocal maintenance sessions are protected by logically separated communication paths. Assessment Method Examine Maintenance policy procedures addressing nonlocal system maintenance system design documentation system configuration settings and associated documentation maintenance records audit records system security plan other relevant documents or records Interview Organizational personnel with system maintenance responsibilities network engineers organizational personnel with information security responsibilities system/network administrators
MA-04(05) Approvals and Notifications	Control Require the approval of each nonlocal maintenance session by [Assignement: personnel or roles] ; and Notify the following personnel or roles of the date and time of planned nonlocal maintenance: [Assignement: personnel and roles]. Discussion Notification may be performed by maintenance personnel. Approval of nonlocal maintenance is accomplished by personnel with sufficient information security and system knowledge to determine the appropriateness of the proposed maintenance. Assessment Objective the approval of each nonlocal maintenance session is required by [Assignement: personnel or roles]; [Assignement: personnel and roles] is/are notified of the date and time of planned nonlocal maintenance. Assessment Method Examine Maintenance policy procedures addressing nonlocal system maintenance notifications supporting nonlocal maintenance sessions maintenance records audit records system security plan other relevant documents or records Interview Organizational personnel with system maintenance responsibilities organizational personnel with notification responsibilities organizational personnel with approval responsibilities organizational personnel with information security responsibilities
MA-04(06) Cryptographic Protection	Control Implement the following cryptographic mechanisms to protect the integrity and confidentiality of nonlocal maintenance and diagnostic communications: [Assignement: cryptographic mechanisms]. Discussion Failure to protect nonlocal maintenance and diagnostic communications can result in unauthorized individuals gaining access to organizational information. Unauthorized access during remote maintenance sessions can result in a variety of hostile actions, including malicious code insertion, unauthorized changes to system parameters, and exfiltration of organizational information. Such actions can result in the loss or degradation of mission or business capabilities. Assessment Objective [Assignement: cryptographic mechanisms] are implemented to protect the integrity of nonlocal maintenance and diagnostic communications; [Assignement: cryptographic mechanisms] are implemented to protect the confidentiality of nonlocal maintenance and diagnostic communications. Assessment Method Examine Maintenance policy procedures addressing nonlocal system maintenance system design documentation system configuration settings and associated documentation cryptographic mechanisms protecting nonlocal maintenance activities maintenance records diagnostic records audit records system security plan other relevant documents or records Interview Organizational personnel with system maintenance responsibilities network engineers organizational personnel with information security responsibilities system/network administrators
MA-04(07) Disconnect Verification	Control Verify session and network connection termination after the completion of nonlocal maintenance and diagnostic sessions. Discussion Verifying the termination of a connection once maintenance is completed ensures that connections established during nonlocal maintenance and diagnostic sessions have been terminated and are no longer available for use. Assessment Objective session connection termination is verified after the completion of nonlocal maintenance and diagnostic sessions; network connection termination is verified after the completion of nonlocal maintenance and diagnostic sessions. Assessment Method Examine Maintenance policy procedures addressing nonlocal system maintenance system design documentation system configuration settings and associated documentation session/network termination logs cryptographic mechanisms protecting nonlocal maintenance activities maintenance records diagnostic records audit records system security plan other relevant documents or records Interview Organizational personnel with system maintenance responsibilities network engineers organizational personnel with information security responsibilities system/network administrators

1.1 Odkazy

1.2 Identifikované požadavky

1.3 Související regulace

2. Identifikované požadavky

Požadavky
Zdroj	Požadavek

3. Související regulace

Regulace
Zdroj	Regulace

Propojené úkoly

Vazby
Typ vazby	Úkol
is blocked by	MA-04 Nonlocal Maintenance – Assessment Procedure
is blocked by	Remote Maintenance
is blocked by	Remote Maintenance Notifications
is blocked by	Auditing Remote Maintenance

NIST -
EN: Publications of the National Institute of Standards and Technology (NIST), U.S. Department of Commerce, https://www.nist.gov/, from their electronic versions (OSCAL; SP 800-63-4 from its HTML version, https://pages.nist.gov/800-63-4/). Works of NIST employees are not subject to copyright protection in the United States (17 U.S.C. § 105); the OSCAL content is dedicated to the public domain worldwide (CC0 1.0); outside the United States NIST grants the right to reprint its technical series publications in all formats (NIST copyright statement). Republished courtesy of the National Institute of Standards and Technology; each document names its citation. Divided into sections and converted into the GRCA format, the wording unchanged. Only the versions published by NIST are authoritative.

DE: Veröffentlichungen des National Institute of Standards and Technology (NIST), U.S. Department of Commerce, https://www.nist.gov/, aus ihren elektronischen Fassungen (OSCAL; SP 800-63-4 aus ihrer HTML-Fassung, https://pages.nist.gov/800-63-4/). Werke von NIST-Beschäftigten sind in den USA urheberrechtlich nicht geschützt (17 U.S.C. § 105); die OSCAL-Inhalte sind weltweit gemeinfrei gestellt (CC0 1.0); außerhalb der USA räumt das NIST das Recht ein, seine Technical-Series-Publikationen in allen Formaten neu zu veröffentlichen (Copyright-Hinweis des NIST). „Republished courtesy of the National Institute of Standards and Technology“; jedes Dokument nennt seine Zitierangabe. In Abschnitte aufgeteilt und in das GRCA-Format umgewandelt, der Wortlaut unverändert. Maßgeblich sind allein die vom NIST veröffentlichten Fassungen.