All .rhosts, .shosts, or host.equiv files must only contain trusted host-user pairs.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-4427	GEN002020	SV-40331r1_rule	ECCD-1 ECCD-2	Medium

Description
If these files are not properly configured, they could allow malicious access by unknown malicious users from untrusted hosts who could compromise the system.

STIG	Date
SOLARIS 10 SPARC SECURITY TECHNICAL IMPLEMENTATION GUIDE	2016-06-22

Details

Check Text ( C-39209r1_chk )
Locate and examine all .rhosts, .shosts, hosts.equiv, and shosts.equiv files. The .rhosts and .shosts files are stored in home directories. (If a user does not have a home directory assigned in /etc/passwd, the root directory (/) is assigned as a default home directory.) Procedure: # for i in `cut -d: -f6 /etc/passwd \| awk '$1 == "" {$1 = "/"} {print $1}'`; do more $i/.rhosts; more $i/.shosts; done # more /etc/hosts.equiv # more /etc/ssh/shosts.equiv If any .rhosts, .shosts, hosts.equiv, or shosts.equiv file contains other than host-user pairs, this is a finding.

Check Text ( C-39209r1_chk )

Locate and examine all .rhosts, .shosts, hosts.equiv, and shosts.equiv files. The .rhosts and .shosts files are stored in home directories. (If a user does not have a home directory assigned in /etc/passwd, the root directory (/) is assigned as a default home directory.)

Procedure:
# for i in `cut -d: -f6 /etc/passwd | awk '$1 == "" {$1 = "/"} {print $1}'`; do more $i/.rhosts; more $i/.shosts; done
# more /etc/hosts.equiv
# more /etc/ssh/shosts.equiv

If any .rhosts, .shosts, hosts.equiv, or shosts.equiv file contains other than host-user pairs, this is a finding.

Fix Text (F-4326r2_fix)
If possible, remove the .rhosts, .shosts, hosts.equiv, and shosts.equiv files. If the files are required, remove any content from the files except for necessary host-user pairs.