cis-gcp-cos-6-2-8

name	cis-gcp-cos-6.2.8
description	Ensure users' home directories permissions are 750 or more restrictive
category	cis-gcp-cos
version	1.2.0
author	cyberstrike-official
tags	["cis","gcp","container-optimized-os","user-accounts","home-directories"]
cis_id	6.2.8
cis_benchmark	CIS Google Container-Optimized OS Benchmark v1.2.0
tech_stack	["gcp","linux"]
cwe_ids	[]
chains_with	[]
prerequisites	[]
severity_boost	{}

6.2.8 Ensure users' home directories permissions are 750 or more restrictive (Automated)

Description

While the system administrator can establish secure permissions for users' home directories, the users can easily override these.

Rationale

Group or world-writable user home directories may enable malicious users to steal or modify other users' data or to gain another user's system privileges.

Audit Procedure

Run the following script and verify no results are returned:

#!/bin/bash
grep -E -v '^(halt|sync|shutdown)' /etc/passwd | awk -F: '($7 != "'"$(which nologin)"'" && $7 != "/bin/false") { print $1 " " $6 }' | while read user dir; do
  if [ ! -d "$dir" ]; then
    echo "The home directory ($dir) of user $user does not exist."
  else
    dirperm=$(ls -ld $dir | cut -f1 -d" ")
    if [ $(echo $dirperm | cut -c6) != "-" ]; then
      echo "Group Write permission set on the home directory ($dir) of user $user"
    fi
    if [ $(echo $dirperm | cut -c8) != "-" ]; then
      echo "Other Read permission set on the home directory () of user "
    
     [ $(  |  -c9) !=  ]; 
       
    
     [ $(  |  -c10) !=  ];