+AC-24 Access Control Decisions
---+AC-24(01) Transmit Access Authorization Information
---+AC-24(02) No User or Process Identity
|
AC-24 Access Control Decisions
Control
[Selection(one-or-more): establish procedures; implement mechanisms] to ensure [Assignement: access control decisions] are applied to each access request prior to access enforcement.
Discussion
Access control decisions (also known as authorization decisions) occur when authorization information is applied to specific accesses. In contrast, access enforcement occurs when systems enforce access control decisions. While it is common to have access control decisions and access enforcement implemented by the same entity, it is not required, and it is not always an optimal implementation choice. For some architectures and distributed systems, different entities may make access control decisions and enforce access.
Assessment Objective
[Selection(one-or-more): establish procedures; implement mechanisms] are taken to ensure that [Assignement: access control decisions] are applied to each access request prior to access enforcement.
Assessment Method
Examine
Access control policy
procedures addressing access control decisions
system design documentation
system configuration settings and associated documentation
system audit records
system security plan
other relevant documents or records
Interview
Organizational personnel with responsibilities for establishing procedures regarding access control decisions to the system
organizational personnel with information security responsibilities
1. Oversigt
| Titel |
Standard |
|
AC-24(01) Transmit Access Authorization Information
|
Control
Transmit [Assignement: access authorization information] using [Assignement: controls] to [Assignement: systems] that enforce access control decisions.
Discussion
Authorization processes and access control decisions may occur in separate parts of systems or in separate systems. In such instances, authorization information is transmitted securely (e.g., using cryptographic mechanisms) so that timely access control decisions can be enforced at the appropriate locations. To support the access control decisions, it may be necessary to transmit as part of the access authorization information supporting security and privacy attributes. This is because in distributed systems, there are various access control decisions that need to be made, and different entities make these decisions in a serial fashion, each requiring those attributes to make the decisions. Protecting access authorization information ensures that such information cannot be altered, spoofed, or compromised during transmission.
Assessment Objective
[Assignement: access authorization information] is transmitted using [Assignement: controls] to [Assignement: systems] that enforce access control decisions.
Assessment Method
Examine
Access control policy
procedures addressing access enforcement
system design documentation
system configuration settings and associated documentation
system audit records
system security plan
other relevant documents or records
Interview
Organizational personnel with access enforcement responsibilities
system/network administrators
organizational personnel with information security responsibilities
system developers
|
|
AC-24(02) No User or Process Identity
|
Control
Enforce access control decisions based on [Assignement: organization-defined security or privacy attributes] that do not include the identity of the user or process acting on behalf of the user.
Discussion
In certain situations, it is important that access control decisions can be made without information regarding the identity of the users issuing the requests. These are generally instances where preserving individual privacy is of paramount importance. In other situations, user identification information is simply not needed for access control decisions, and especially in the case of distributed systems, transmitting such information with the needed degree of assurance may be very expensive or difficult to accomplish. MAC, RBAC, ABAC, and label-based control policies, for example, might not include user identity as an attribute.
Assessment Objective
- access control decisions are enforced based on [Assignement: security attributes] that do not include the identity of the user or process acting on behalf of the user (if selected);
- access control decisions are enforced based on [Assignement: privacy attributes] that do not include the identity of the user or process acting on behalf of the user (if selected).
Assessment Method
Examine
Access control policy
procedures addressing access enforcement
system design documentation
system configuration settings and associated documentation
system audit records
system security plan
privacy plan
other relevant documents or records
Interview
Organizational personnel with access enforcement responsibilities
system/network administrators
organizational personnel with information security and privacy responsibilities
system developers
|
1.1 Referencer
1.2 Identificerede krav
1.3 Relaterede reguleringer
2. Identificerede krav
3. Relaterede reguleringer
Reguleringer
| Kilde |
Regulering |
Linkede sager
|