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V-258052

CAT II (Medium)

All RHEL 9 local interactive user home directories defined in the /etc/passwd file must exist.

Rule ID

SV-258052r1184315_rule

STIG

Red Hat Enterprise Linux 9 Security Technical Implementation Guide

Version

V2R8

CCIs

CCI-000366

Discussion

If a local interactive user has a home directory defined that does not exist, the user may be given access to the / directory as the current working directory upon logon. This could create a denial of service because the user would not be able to access their logon configuration files, and it may give them visibility to system files they normally would not be able to access.

Check Content

Verify the assigned home directories of all interactive users on the system exist with the following command:

$ sudo pwck -r 

The output should not return any interactive (human) users.

Ask the system administrator (SA) if any users found without home directories are local interactive users. 
If the SA is unable to provide a response, check for users with a user identifier (UID) of 1000 or greater with the following command:

$ awk -F: '($3>=1000)&&($1!="nobody"){print $1 ":" $3}' /etc/passwd

If any interactive users do not have a home directory assigned, this is a finding.

Fix Text

Create home directories to all local interactive users that currently do not have a home directory assigned. Use the following commands to create the user home directory assigned in "/etc/ passwd":

Note: The example will be for the user disauser, who has a home directory of "/home/disauser", a user identifier (UID) of "disauser", and a group identifier (GID) of "users assigned" in "/etc/passwd".

$ sudo mkdir /home/disauser 
$ sudo chown disauser /home/disauser
$ sudo chgrp users /home/disauser
$ sudo chmod 0750 /home/disauser