Vulnerability Discussion

The system must be configured to prevent access to other user's home
folders.

The default behavior of macOS is to allow all valid users access to the top level of every other user's
home folder while restricting access only to the Apple default folders within.

Check

Verify the macOS system is configured so that permissions are set correctly on user home
directories with the following command:

/usr/bin/find /System/Volumes/Data/Users -mindepth 1 -maxdepth 1 -type d ! \( -perm 700 -o -perm 711
\) | /usr/bin/grep -v "Shared" | /usr/bin/grep -v "Guest" | /usr/bin/wc -l | /usr/bin/xargs

If the result is not "0", this is a finding.

Fix

Configure the macOS system to set the appropriate permissions for each
user on the system with the following command:

IFS=$'\n'
for userDirs in $( /usr/bin/find /System/Volumes/Data/Users -mindepth 1 -maxdepth 1 -type d ! \( -perm
700 -o -perm 711 \) | /usr/bin/grep -v "Shared" | /usr/bin/grep -v "Guest" ); do
/bin/chmod og-rwx "$userDirs"
done
unset IFS