All GIDs referenced in the /etc/passwd file must be defined in the /etc/group file.

From HP-UX 11.31 Security Technical Implementation Guide

Associated with IA controls: ECSC-1

Associated with: CCI-000366

SV-38455r1_rule All GIDs referenced in the /etc/passwd file must be defined in the /etc/group file.

Vulnerability 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

Determine if any GIDs referenced in /etc/passwd are not defined in /etc/group. Procedure: # cat /etc/passwd | cut -f 4,4 -d ":" | sort | uniq With the above GIDs, manually execute the following command for every GID from above. Note that this command is expected to return line entry information from /etc/group. # grep -n /etc/group If any GIDs referenced in /etc/passwd and not defined in /etc/group are returned, this is a finding.

Fix text

Add a group to the system (edit /etc/group) for each GID referenced without a corresponding group.

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