Title

The INSTDATA Control Option is not set to (0). (Cat II impact)

Discussion

The INSTDATA Control Option controls the value of the 4-byte global data installation data area. This value is passed to the security exit developed at a particular site. The system-wide options control the default settings for determining how the ACP will function when handling requests for access to the operating system environment, ACP, and customer data. The ACP provides the ability to set a number of these fields at the subsystem level. If no setting is found, the system-wide defaults will be used. The improper setting of any of these fields, individually or in combination with another, can compromise the security of the processing environment. In addition, failure to establish standardized settings for the ACP control options introduces the possibility of exposure during migration process or contingency plan activation.

Check Content

a) Refer to the following report produced by the TSS Data Collection: - TSSCMDS.RPT(TSSPRMFL) Automated Analysis Refer to the following report produced by the z/OS Data Collection: - PDI(TSS0410) b) If the INSTDATA Control Option is set to (0), there is NO FINDING. c) If the INSTDATA Control Option is set to a value other than (0), this is a FINDING.

Fix Text

Evaluate the impact associated with implementation of the control option. Develop a plan of action to set the INSTDATA control option value to (0) and proceed with the change.

Additional Identifiers

Rule ID: SV-200r2_rule

Vulnerability ID: V-200

Group Title: TSS0410

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.