Title

The use of FTP must be restricted. (Cat II impact)

Discussion

FTP is an insecure protocol that transfers files and credentials in clear text, and can be replaced by using SFTP. However, if FTP is permitted for use in the environment, it is important to ensure that the default "system" accounts are not permitted to transfer files via FTP, especially the root role. Consider also adding the names of other privileged or shared accounts that may exist on the system such as user "oracle" and the account which the web server process runs under.

Check Content

The root role is required. Determine if the FTP server package is installed: # pkg list service/network/ftp If the output of this command is: pkg list: no packages matching 'service/network/ftp' installed no further action is required. If the FTP server is installed, determine if FTP access is restricted. # for user in `logins -s | awk '{ print $1 }'` \ aiuser noaccess nobody nobody4; do grep -w "${user}" /etc/ftpd/ftpusers >/dev/null 2>&1 if [ $? != 0 ]; then echo "User '${user}' not in /etc/ftpd/ftpusers." fi done If output is returned, this is a finding.

Fix Text

The root role is required. Determine if the FTP server package is installed: # pkg list service/network/ftp If the output of this command is: pkg list: no packages matching 'service/network/ftp' installed no further action is required. # for user in `logins -s | awk '{ print $1 }'` \ aiuser noaccess nobody nobody4; do $(echo $user >> /etc/ftpd/ftpusers) done # sort -u /etc/ftpd/ftpusers > /etc/ftpd/ftpusers.temp # mv /etc/ftpd/ftpusers.temp /etc/ftpd/ftpusers

Additional Identifiers

Rule ID: SV-216358r603267_rule

Vulnerability ID: V-216358

Group Title: SRG-OS-000480

Expert Comments

CCIs tied to check.

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