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

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-827	GEN003900	SV-64115r1_rule		Medium

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

STIG	Date
Oracle Linux 5 Security Technical Implementation Guide	2020-02-25

Details

Check Text ( C-52613r4_chk )
The operating system uses the CUPS print service. Verify remote host access is limited. Procedure: # grep -i Listen /etc/cups/cupsd.conf The /etc/cups/cupsd.conf file must not contain a Listen *: 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 "" element should limit access to the printers to @LOCAL and specific hosts. If the "Allow From" line contains "All" this is a finding.

Check Text ( C-52613r4_chk )

The operating system uses the CUPS print service. Verify remote host access is limited.

Procedure:
# grep -i Listen /etc/cups/cupsd.conf

The /etc/cups/cupsd.conf file must not contain a Listen *: 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 "" 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 (F-54733r2_fix)
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 "" element to "Deny From All" and "Allow from 127.0.0.1" or allowed host addresses. Restart cups: # service cups restart