The /etc/hosts file must not have an extended ACL.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-22326	GEN001369	SV-26414r1_rule	ECLP-1	Medium

Description
The /etc/hosts file (or equivalent) configures local host name to IP address mappings typically taking precedence over DNS resolution. If this file is maliciously modified, it could cause the failure or compromise of security functions requiring name resolution, which may include time synchronization, centralized authentication, and remote system logging.

STIG	Date
SOLARIS 9 X86 SECURITY TECHNICAL IMPLEMENTATION GUIDE	2015-10-01

Details

Check Text ( C-27495r2_chk )
Verify /etc/hosts has no extended ACL. # ls -lL /etc/hosts If the permissions include a "+", the file has an extended ACL and this is a finding.

Fix Text (F-23601r1_fix)
Remove the extended ACL from the file. # getfacl /etc/hosts Remove each ACE returned. # setfacl -d [ACE] /etc/hosts