V-234994

Discussion

If the Group Identifier (GID) of a local interactive user’s home directory is not the same as the primary GID of the user, this would allow unauthorized access to the user’s files, and users that share the same group may not be able to access files that they legitimately should.

Check Content

Verify the assigned home directory of all SUSE operating system local interactive users is group-owned by that user's primary GID.

Check the home directory assignment for all nonprivileged users on the system with the following command:

Note: This may miss local 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. The returned directory "/home/doduser" is used as an example.

> awk -F: '($3>=1000)&&($7 !~ /nologin/){print $4, $6}' /etc/passwd)
250:/home/doduser

Check the user's primary group with the following command:

> grep users /etc/group
users:x:250:doduser,doduser,nsauser

If the user home directory referenced in "/etc/passwd" is not group-owned by that user's primary GID, this is a finding.