The .rhosts, .shosts, hosts.equiv, shosts.equiv, /etc/passwd, /etc/shadow, and/or /etc/group files must not contain a plus (+) without defining entries for NIS+ netgroups.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-11987	GEN001980	SV-37435r1_rule	ECCD-1 ECCD-2	Medium

Description
A plus (+) in system accounts files causes the system to lookup the specified entry using NIS. If the system is not using NIS, no such entries should exist.

STIG	Date
Red Hat Enterprise Linux 5 Security Technical Implementation Guide	2013-04-10

Details

Check Text ( C-36048r1_chk )
Check system configuration files for plus (+) entries. Procedure: # find / -name .rhosts # grep + //.rhosts # find / -name .shosts # grep + //.shosts # find / -name hosts.equiv # grep + //hosts.equiv # find / -name shosts.equiv # grep + //shosts.equiv # grep + /etc/passwd # grep + /etc/shadow # grep + /etc/group If the .rhosts, .shosts, hosts.equiv, shosts.equiv, /etc/passwd, /etc/shadow, and/or /etc/group files contain a plus (+) and do not define entries for NIS+ netgroups, this is a finding.

Check Text ( C-36048r1_chk )

Check system configuration files for plus (+) entries.

Procedure:
# find / -name .rhosts
# grep + //.rhosts

# find / -name .shosts
# grep + //.shosts

# find / -name hosts.equiv
# grep + //hosts.equiv

# find / -name shosts.equiv
# grep + //shosts.equiv

# grep + /etc/passwd
# grep + /etc/shadow
# grep + /etc/group

If the .rhosts, .shosts, hosts.equiv, shosts.equiv, /etc/passwd, /etc/shadow, and/or /etc/group files contain a plus (+) and do not define entries for NIS+ netgroups, this is a finding.

Fix Text (F-31292r1_fix)
Edit the .rhosts, .shosts, hosts.equiv, shosts.equiv, /etc/passwd, /etc/shadow, and/or /etc/group files and remove entries containing a plus (+).