STIGQter: STIG Summary: IBM z/OS ACF2 Security Technical Implementation Guide Version: 8 Release: 2 Benchmark Date: 23 Apr 2021:

IBM z/OS procedures must restrict ACF2 LOGONIDs with the READALL attribute to auditors and/or authorized users.

DISA Rule

SV-223470r533198_rule

Vulnerability Number

V-223470

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

ACF2-ES-000520

Severity

CAT II

CCI(s)

• CCI-000366 - The organization implements the security configuration settings.

Weight

10

Fix Recommendation

Develop procedures to control Logonids with the READALL attribute.

The READALL privilege is available for actual auditing of system data. It gives the capability of looking at every data set on the system despite the data set rules. Its use is strongly discouraged. Always grant access through the use of standard data set access rules. Under no circumstances will the privilege be used as a convenience to the person maintaining the rule sets. Only use this privilege when absolutely necessary, and only give it to auditors. Remove the privilege once the audit is complete. Fully document the granting and revoking of the access.

Check Contents

From the ACF Command line enter:
SET LID
LIST IF(READALL)

If procedures are in place to ensure logonids with the READALL attribute are used and controlled in accordance with the DISA requirements, this is not a finding.

The READALL privilege is available for actual auditing of system data. It gives the capability of looking at every data set on the system despite the data set rules. Its use is strongly discouraged. Always grant access through the use of standard data set access rules. Under no circumstances will the privilege be used as a convenience to the person maintaining the rule sets. Only use this privilege when absolutely necessary, and only give it to auditors. Remove the privilege once the audit is complete. Fully document the granting and revoking of the access.

Vulnerability Number

V-223470

Documentable

False

Rule Version

ACF2-ES-000520

Severity Override Guidance

From the ACF Command line enter:
SET LID
LIST IF(READALL)

If procedures are in place to ensure logonids with the READALL attribute are used and controlled in accordance with the DISA requirements, this is not a finding.

The READALL privilege is available for actual auditing of system data. It gives the capability of looking at every data set on the system despite the data set rules. Its use is strongly discouraged. Always grant access through the use of standard data set access rules. Under no circumstances will the privilege be used as a convenience to the person maintaining the rule sets. Only use this privilege when absolutely necessary, and only give it to auditors. Remove the privilege once the audit is complete. Fully document the granting and revoking of the access.

Check Content Reference

M

Target Key

4100

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