z/OS IBM CICS Transaction Server for ACF2 STIG Version Comparison

There are 1 differences between versions v6 r7 (Nov. 23, 2022) (the "left" version) and v7 r1 (Jan. 30, 2025) (the "right" version).

Check ZCIC0041 was changed between these two versions. Green, underlined text was added, red, struck-out text was removed.

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Title

CICS default logonid(s) must be defined and/or controlled in accordance with the security requirements.

Check Content

a) Refer to the following report produced by the z/OS Data Collection: - EXAM.RPT(CICSPROC) Refer to the following report produced by the ACF2 Data Collection: - ACF2CMDS.RPT(LOGONIDS) - ACF2CMDS.RPT(RESOURCE) Refer to the CICS Systems Programmer Worksheets filled out from previous vulnerability ZCIC0010. b) Ensure the following items are in effect for the CICS default logonid(s) (i.e., Browse the ACF2PARM DD statement for DEFAULT TERMINAL=<parameter> and DEFAULT NONTERMINAL=nnnnnnnn): 1) Not granted the ACF2 NON-CNCL privilege. 2) No access to interactive on-line facilities (e.g., TSO) other than CICS. 3) IDLE(15) field is set to 15 minutes. 4) A system's default time for terminal lock-out or session termination may be lengthened to 30 minutes at the discretion of the ISSM. The ISSM will maintain the documentation for each system with a time-out adjusted beyond the 15-minute recommendation to explain the basis for this decision. 5) Restricted from accessing all data sets and resources with the following exceptions: (a) Non-restricted CICS transactions (e.g., CESF, CESN, 'good morning' transaction, etc.) (b) If applicable, resources necessary to operate in an intersystem communication (ISC) environment (i.e., LU6.1, LU6.2, and MRO) (c) MRO) Note: Refer to the IBM CICS Transaction Server Resource Definition Guide for latest and most accurate definition for the Default CICS User. Note: Any exceptions to these guidelines must be approved by the site ISSO and documented in site security plan. (c) If all items in (b) are true, this is not a finding. (d) If any item in (b) is untrue, this is a finding.

Discussion

CICS is a transaction-processing product that provides programmers with the facilities to develop interactive applications. Improperly defined or controlled CICS userids (i.e., region, default, and terminal users) may provide an exposure and vulnerability within the CICS environment. This could result in the compromise of the confidentiality, integrity, and availability of the CICS region, applications, and customer data.

Fix

Ensure that the default CICS user is restricted and properly defined. Ensure the following items are in effect for the CICS default logonid(s) (i.e., Browse the ACF2PARM DD statement for DEFAULT TERMINAL=<parameter> and DEFAULT NONTERMINAL=nnnnnnnn): Not granted the ACF2 NON-CNCL privilege. Use the ACF2 LIST command to display the default CICS userid. Example: SET LID LIST CICS CHANGE CICS NONON-CNCL No access to interactive online facilities (e.g., TSO) other than CICS. Use the ACF2 LIST command to display the default CICS userid. Example: SET LID LIST CICS CHANGE CICS NOTSO IDLE(15) field is set to 15 minutes, up to 30 with justification. Use the ACF2 LIST command to display the default CICS userid. Example: SET LID LIST CICS CHANGE CICS IDLE(15) up to 30 with justification Restricted from accessing all data sets and resources with the following exceptions: Non-restricted CICS transactions (e.g., CESF, CESN, 'good morning' transaction, etc.) If applicable, resources necessary to operate in an intersystem communication (ISC) environment (i.e., LU6.1, LU6.2, and MRO) Use the ACF2 ACFRPTRX or ACFRPTXR reports to verify if the CICS default userid has access to any resources or datasets.