Title

All SUSE operating system local interactive user home directories defined in the /etc/passwd file must exist. (Cat II impact)

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 directory of all SUSE operating system local interactive users on the system exists. Check the home directory assignment for all local interactive non-privileged users on the system with the following command: > awk -F: '($3>=1000)&&($7 !~ /nologin/){print $1, $6}' /etc/passwd smithj /home/smithj Note: This may miss interactive users that have been assigned a privileged User Identifier (UID). Evidence of interactive use may be obtained from a number of log files containing system logon information. Check that all referenced home directories exist with the following command: > sudo pwck -r user 'smithj': directory '/home/smithj' does not exist If any home directories referenced in "/etc/passwd" are returned as not defined, this is a finding.

Fix Text

Create home directories to all SUSE operating system 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 smithj, who has a home directory of "/home/smithj", a UID of "smithj", and a Group Identifier (GID) of "users assigned" in "/etc/passwd". > sudo mkdir /home/smithj > sudo chown smithj /home/smithj > sudo chgrp users /home/smithj > sudo chmod 0750 /home/smithj

Additional Identifiers

Rule ID: SV-234992r622137_rule

Vulnerability ID: V-234992

Group Title: SRG-OS-000480-GPOS-00227

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.