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Check: ZUSS0045

zOS TSS STIG: ZUSS0045 (in versions v6 r43 through v6 r31)

Title

The user account for the z/OS UNIX (RMFGAT) must be properly defined. (Cat II impact)

Discussion

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.

Check Content

RMFGAT is the userid for the Resource Measurement Facility (RMF) Monitor III Gatherer. If RMFGAT is not define this is not applicable. From a command input screen enter: TSS LIST (RMFGAT) DATA ALL Alternately: Refer to the following reports produced by the ACP Data Collection: - TSSCMDS.RPT(@ACIDS) If RMFGAT is defined as follows, this is not a finding - Default group specified as OMVSGRP or STCOMVS - A unique, non-zero UID - HOME directory specified as “/” - Shell program specified as “/bin/sh”

Fix Text

Define RMFGAT user account is defined as specified below: Default group specified as OMVSGRP or STCOMVS A unique, non-zero UID HOME directory specified as “/” Shell program specified as “/bin/sh”

Additional Identifiers

Rule ID: SV-87477r1_rule

Vulnerability ID: V-6989

Group Title: ZUSS0045

Expert Comments

Expert comments are only available to logged-in users.

CCIs

CCIs tied to check.

Number	Definition
CCI-000764	Uniquely identify and authenticate organizational users and associate that unique identification with processes acting on behalf of those users.

Controls

Controls tied to check. These are derived from the CCIs shown above.

Number	Title
IA-2	Identification and Authentication (organizational Users)