Title

All AIX Group Identifiers (GIDs) referenced in the /etc/passwd file must be defined in the /etc/group file. (Cat II impact)

Discussion

If a user is assigned the GID of a group not existing on the system, and a group with that GID is subsequently created, the user may have unintended rights to the group.

Check Content

Verify that there are no GIDs referenced in "/etc/passwd" that are not defined in "/etc/group": # cut -d: -f4 /etc/passwd 0 1 2 3 4 203 204 # cut -d: -f3 /etc/group 0 1 2 3 4 203 204 If there are GID's listed in the "/etc/passwd" file that are not listed in the "/etc/group" file, this is a finding.

Fix Text

Add a group to the system for each GID referenced without a corresponding group by running "mkgroup" command.

Additional Identifiers

Rule ID: SV-215339r508663_rule

Vulnerability ID: V-215339

Group Title: SRG-OS-000480-GPOS-00227

Expert Comments

CCIs tied to check.

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