Check for Duplicate GIDs

MediumLevel 1Automatedsolaris

Description

Although the groupadd program will not let you create a duplicate Group ID (GID), it is possible for an administrator to manually modify group and change the GID field. User groups must be assigned unique GIDs for accountability and to ensure appropriate access protections. Audit: automated read-only check derived from the CIS audit procedure; it prints "compliant" when the control is met.

How it is checked

Audit method: Shell command

shell

command -v getent >/dev/null 2>&1 || exit 1; out=$( { getent group | cut -f3 -d: | sort -n | uniq -d ; } 2>/dev/null ); [ -z "$out" ] && echo compliant || printf '%s\n' "$out" | head -n 20

Expected output: compliant

How it is fixed

Fix method: Guidance or infrastructure patch

Correct or justify any items discovered in the Audit step. Determine if there exists any duplicate group identifiers, and work with each respective group owner to remediate this issue and ensure that the group ownership of their files are set to an appropriate value.

Properties

Operating systems: Any
Tags: solarisaccounts
Reference: CIS Oracle Solaris 11.4 Benchmark v1.1.0 - 9.17 Check for Duplicate GIDs

Check this host

Run this on a machine you are allowed to audit. The scan is read-only.

shell

tmaegis scan --target solaris