Title

The hosts.lpd file (or equivalent) must not contain a + character. (Cat II impact)

Discussion

Having the '+' character in the hosts.lpd (or equivalent) file allows all hosts to use local system print resources.

Check Content

Look for the presence of a print service configuration file. Procedure: # find /etc -name hosts.lpd -print # find /etc -name Systems -print # find /etc -name printers.conf If none of the files are found, this check should be marked Not Applicable. Otherwise, examine the configuration file. Procedure: # more <print service file> Check for entries that contain a ‘+’ or ‘_’ character. If any are found, this is a finding. For the "cups" print service, verify remote host access is limited. # grep -i Listen /etc/cups/cupsd.conf The /etc/cups/cupsd.conf file must not contain a Listen *:<port> or equivalent line. If the network address of the "Listen" line is unrestricted. This is a finding. # grep -i "Allow From" /etc/cups/cupsd.conf The "Allow From" line within the "<Location />" element should limit access to the printers to @LOCAL and specific hosts. If the "Allow From" line contains "All" this is a finding.

Fix Text

Remove the '+' entries from the hosts.lpd (or equivalent) file. Configure cups to use only the localhost or specified remote hosts. Procedure: Modify the /etc/cups/cupsd.conf file to "Listen" only to the local machine or a known set of hosts (i.e., Listen localhost:631). Modify the /etc/cups/cupsd.conf file "<Location />" element to "Deny From All" and "Allow from 127.0.0.1" or allowed host addresses. Restart cups: # rccups restart

Additional Identifiers

Rule ID: SV-45812r1_rule

Vulnerability ID: V-827

Group Title: GEN003900

Expert Comments

CCIs tied to check.

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