IBM RACF started tasks defined with the trusted attribute must be justified.
An XCCDF Rule
Description
<VulnDiscussion>Trusted Started tasks bypass RACF checking. It is vital that this attribute is NOT granted to unauthorized Started Tasks which could then obtain unauthorized access to the system. This could result in the compromise of the confidentiality, integrity, and availability of the operating system, ACP, or customer data.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>
- ID
- SV-223661r604139_rule
- Severity
- Medium
- References
- Updated
Remediation - Manual Procedure
Review assignment of the TRUSTED attribute in ICHRIN03 and/or the STARTED resource class. Ensure only those trusted STCs that are listed in the IBM z/OS MVS Initialization and Tuning Reference have been granted this authority. Evaluate the impact of correcting the deficiency. Develop a plan of action and implement the changes. While the actual list may vary based on local site requirements and software configuration, the started tasks listed in the IBM z/OS MVS Initialization and Tuning Reference is an approved list of started tasks that may be considered trusted started procedures. Guidelines for reference:
Assign the TRUSTED attribute when one of the following conditions applies:
-The started procedure or address space creates or accesses a wide variety of unpredictably named data sets within your installation.
-Insufficient authority to an accessed resource might risk an unsuccessful IPL or other system problem.
-Avoid assigning TRUSTED to a z/OS started procedure or address space unless it is listed here or you are instructed to do so by the product documentation.