Check: RACF-ES-000320
IBM z/OS RACF STIG:
RACF-ES-000320
(in versions v8 r14 through v7 r1)
Title
IBM RACF must limit WRITE or greater access to all system-level product installation libraries to system programmers. (Cat II impact)
Discussion
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Satisfies: SRG-OS-000080-GPOS-00048, SRG-OS-000259-GPOS-00100, SRG-OS-000324-GPOS-00125
Check Content
Have the systems programmer for z/OS supply the following information: The data set name and associated SREL for each SMP/E CSI utilized to maintain this system. The data set name of all SMP/E TLIBs and DLIBs used for installation and production support. A comprehensive list of the SMP/E DDDEFs for all CSIs may be used if valid. If the ESM data set rules for system-level product installation libraries (e.g., SMP/E CSIs) do not restrict WRITE or greater access to only z/OS systems programming personnel this is a finding. If any of these data sets cannot be identified due to a lack of requested information, this is a finding.
Fix Text
Review access authorization to critical system files. Evaluate the impact of correcting the deficiency. Develop a plan of action and implement the changes as required to protect System-level product installation libraries. Configure allocate access to all system-level product execution libraries to be limited to system programmers only.
Additional Identifiers
Rule ID: SV-223680r853585_rule
Vulnerability ID: V-223680
Group Title: SRG-OS-000080-GPOS-00048
Expert Comments
CCIs
| Number | Definition |
|---|---|
| CCI-000213 |
The information system enforces approved authorizations for logical access to information and system resources in accordance with applicable access control policies. |
| CCI-001499 |
The organization limits privileges to change software resident within software libraries. |
| CCI-002235 |
The information system prevents non-privileged users from executing privileged functions to include disabling, circumventing, or altering implemented security safeguards/countermeasures. |