Check: RACF-ES-000540
IBM z/OS RACF STIG:
RACF-ES-000540
(in versions v8 r12 through v7 r1)
Title
IBM z/OS must limit access for SMF collection files (i.e., SYS1.MANx) to appropriate users and/or batch jobs that perform SMF dump processing. (Cat II impact)
Discussion
SMF data collection is the system activity journaling facility of the z/OS system. Unauthorized access could result in the compromise of logging and recording of the operating system environment, ESM, and customer data. Unauthorized disclosure of audit records can reveal system and configuration data to attackers, thus compromising its confidentiality. Audit information includes all information (e.g., audit records, audit settings, audit reports) needed to successfully audit operating system activity. Satisfies: SRG-OS-000057-GPOS-00027, SRG-OS-000058-GPOS-00028, SRG-OS-000059-GPOS-00029, SRG-OS-000256-GPOS-00097, CCI-001494, SRG-OS-000257-GPOS-00098, SRG-OS-000258-GPOS-00099, SRG-OS-000080-GPOS-00048, SRG-OS-000206-GPOS-00084, SRG-OS-000324-GPOS-00125
Check Content
Refer to the SMFPRMxx member in SYS1.PARMLIB. Determine the SMF and/or Logstream dataset name. If the following statements are true, this is not a finding. The ESM data set rules for the SMF data collection files (e.g., SYS1.MAN* or IFASMF.SYS1.*) restrict WRITE or greater access to only z/OS systems programming personnel. The ESM data set rules for the SMF data collection files (e.g., SYS1.MAN* or IFASMF.SYS1.*) restrict UPDATE access to z/OS systems programming personnel, and/or batch jobs that perform SMF dump processing and others approved by ISSM. The ESM data set rules for the SMF data collection files (e.g., SYS1.MAN* or IFASMF.SYS1.*) restrict READ access to auditors and others approved by the ISSM. The ESM data set rules for SMF data collection files (e.g., SYS1.MAN* or IFASMF.SYS1.*) specify that all (i.e., failures and successes) UPDATE and/or ALTER access are logged.
Fix Text
Configure WRITE and above access to SMF collection files to be limited to only systems programming staff and and/or batch jobs that perform SMF dump processing, access can be granted to others as determined by ISSM. Configure READ access to be limited to auditors. READ access may be granted to others as determined by the ISSM. Access to other users specified must be documented in a security plan. Ensure the accesses are being logged.
Additional Identifiers
Rule ID: SV-223701r853604_rule
Vulnerability ID: V-223701
Group Title: SRG-OS-000057-GPOS-00027
Expert Comments
CCIs
| Number | Definition |
|---|---|
| CCI-000162 |
The information system protects audit information from unauthorized access. |
| CCI-000163 |
The information system protects audit information from unauthorized modification. |
| CCI-000164 |
The information system protects audit information from unauthorized deletion. |
| CCI-000213 |
The information system enforces approved authorizations for logical access to information and system resources in accordance with applicable access control policies. |
| CCI-001314 |
The information system reveals error messages only to organization-defined personnel or roles. |
| CCI-001493 |
The information system protects audit tools from unauthorized access. |
| CCI-001494 |
The information system protects audit tools from unauthorized modification. |
| CCI-001495 |
The information system protects audit tools from unauthorized deletion. |
| CCI-002235 |
The information system prevents non-privileged users from executing privileged functions to include disabling, circumventing, or altering implemented security safeguards/countermeasures. |