Title

All AIX interactive users home directories must be owned by their respective users. (Cat II impact)

Discussion

System binaries are executed by privileged users as well as system services, and restrictive permissions are necessary to ensure that their execution of these programs cannot be co-opted.

Check Content

Check the ownership of each user's home directory listed in the "/etc/passwd file": # cut -d: -f6 /etc/passwd | xargs ls -lLd drwxr-xr-x 21 root system 4096 Jan 29 09:58 / drwxr-xr-x 4 bin bin 45056 Jan 24 12:31 /bin drwxr-xr-x 2 doejohn staff 256 Jan 25 13:18 /home/doejohn drwxr-xr-x 2 sshd system 256 Aug 11 2017 /home/srvproxy drwx------ 2 root system 256 Jan 30 12:54 /root drwxrwxr-x 4 bin bin 256 Mar 23 2017 /usr/sys drwxrwxr-x 15 root adm 4096 Jan 24 12:26 /var/adm drwxr-xr-x 6 root system 4096 Jan 24 07:34 /var/adm/invscout drwxr-xr-x 8 esaadmin system 256 Jan 24 09:02 /var/esa If any user's home directory is not owned by the assigned user, this is a finding.

Fix Text

Change the owner of a user's home directory to its assigned user using command: # chown <user> <home directory>

Additional Identifiers

Rule ID: SV-215276r991592_rule

Vulnerability ID: V-215276

Group Title: SRG-OS-000480-GPOS-00230

Expert Comments

CCIs tied to check.

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