STIGQter: STIG Summary: IBM z/OS ACF2 Security Technical Implementation Guide Version: 9 Release: 9 Benchmark Date: 01 Jul 2026:

CA-ACF2 must limit Write and Allocate access to all APF-authorized libraries to system programmers only.

DISA Rule

SV-223449r1225681_rule

Vulnerability Number

V-223449

Group Title

SRG-OS-000080-GPOS-00048

Rule Version

ACF2-ES-000280

Severity

CAT I

CCI(s)

CCI-000213 - Enforce approved authorizations for logical access to information and system resources in accordance with applicable access control policies.
CCI-001499 - Limit privileges to change software resident within software libraries.
CCI-002235 - Prevent non-privileged users from executing privileged functions.

Weight

Fix Recommendation

Review access authorization to critical system files. Evaluate the impact of correcting the deficiency. Develop a plan of action and implement the changes required to protect APF Authorized Libraries.

Configure Update and Allocate access to all APF-authorized libraries to be limited to system programmers only and all update and alter access is logged.

Check Contents

From Any ISPF input line, enter:
TSO ISRDDN APF

If all of the following are untrue, this is not a finding.

If any of the following is true, this is a finding.

- The ACP data set rules for APF libraries do not restrict WRITE and/or ALLOCATE access to only z/OS systems programming personnel.
- The ACP data set rules for APF libraries do not specify that all (i.e., failures and successes) WRITE and/or ALLOCATE access will be logged.

CA-ACF2 must limit Write and Allocate access to all APF-authorized libraries to system programmers only.

DISA Rule

Vulnerability Number

Group Title

Rule Version

Severity

CCI(s)

Weight

Fix Recommendation

Check Contents

Vulnerability Number

Documentable

Rule Version

Severity Override Guidance

Check Content Reference

Target Key