Check: TSS0780
zOS TSS STIG:
TSS0780
(in versions v6 r43 through v6 r30)
Title
Access to the TSS MODE resource class is inappropriate. (Cat I impact)
Discussion
Access to the resources in the MODE resource class overrides the security mode in which an Acid will operate for all facilities. Acids with permission to these resources can compromise the security of the processing environment. In addition, failure to restrict access to these resources introduces the possibility of exposure during migration process or contingency plan activation.
Check Content
a) Refer to the following reports produced by the TSS Data Collection and Data Set and Resource Data Collection: - SENSITVE.RPT(WHOHMODE) Automated Analysis Refer to the following report produced by the Data Set and Resource Data Collection: - PDI(TSS0780) b) If any ACIDs is permitted a mode of DORM, WARN, or IMPL, this is FINDING. c) If all ACIDs are permitted to mode of FAIL or do not have any permissions to the MODE resource class, there is NO FINDING.
Fix Text
The IAO will evaluate the impact associated with implementation of the removal of this access. Develop a plan of action to ensure that the ACIDs use the default MODE settings and proceed with the change.
Additional Identifiers
Rule ID: SV-22058r2_rule
Vulnerability ID: V-19893
Group Title: TSS0780
Expert Comments
CCIs
| Number | Definition |
|---|---|
| CCI-000213 |
Enforce approved authorizations for logical access to information and system resources in accordance with applicable access control policies. |
| CCI-002358 |
Implement a reference monitor for organization-defined access control policies that is always invoked. |