The user account for the z/OS UNIX kernel (OMVS) is not properly defined to the security database.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-6987	ZUSS0043	SV-7290r2_rule	DCCS-1 DCCS-2	Medium

Description
User identifiers (ACF2 logonids, RACF userids, and Top Secret ACIDs), groups, and started tasks that use z/OS UNIX facilities are defined to an ACP with attributes including UID and GID. If these attributes are not correctly defined, data access or command privilege controls could be compromised.

STIG	Date
z/OS ACF2 STIG	2018-12-20

Details

Check Text ( C-3932r1_chk )
a) Refer to the following reports produced by the ACP Data Collection: ACF2 - ACF2CMDS.RPT(OMVSUSER) - ACF2CMDS.RPT(LOGONIDS) RACF - RACFCMDS.RPT(LISTUSER) TSS - TSSCMDS.RPT(@ACIDS) b) If OMVS is defined as follows, there is NO FINDING: 1) No access to interactive on-line facilities (e.g., TSO, CICS, etc.) 2) Default group specified as OMVSGRP or STCOMVS 3) UID(0) 4) HOME directory specified as “/” 5) Shell program specified as “/bin/sh” c) If OMVS is not defined as specified in (b) above, this is a FINDING

Check Text ( C-3932r1_chk )

a) Refer to the following reports produced by the ACP Data Collection:

ACF2
- ACF2CMDS.RPT(OMVSUSER)
- ACF2CMDS.RPT(LOGONIDS)
RACF
- RACFCMDS.RPT(LISTUSER)
TSS
- TSSCMDS.RPT(@ACIDS)

b) If OMVS is defined as follows, there is NO FINDING:

1) No access to interactive on-line facilities (e.g., TSO, CICS, etc.)
2) Default group specified as OMVSGRP or STCOMVS
3) UID(0)
4) HOME directory specified as “/”
5) Shell program specified as “/bin/sh”

c) If OMVS is not defined as specified in (b) above, this is a FINDING

Fix Text (F-18962r1_fix)
The systems programmer will verify that OMVS is defined as specified below: 1) No access to interactive on-line facilities (e.g., TSO, CICS, etc.) 2) Default group specified as OMVSGRP or STCOMVS 3) UID(0) 4) HOME directory specified as “/” 5) Shell program specified as “/bin/sh”