The /etc/shells (or equivalent) file must exist.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-916	GEN002120	SV-40806r1_rule	ECSC-1	Medium

Description
The shells file (or equivalent) lists approved default shells. It helps provide layered defense to the security approach by ensuring users cannot change their default shell to an unauthorized shell that may not be secure.

STIG	Date
SOLARIS 10 X86 SECURITY TECHNICAL IMPLEMENTATION GUIDE	2018-04-10

Details

Check Text ( C-432r2_chk )
Verify /etc/shells exists. # ls -l /etc/shells If the file does not exist, this is a finding.

Fix Text (F-34658r1_fix)
Create a /etc/shells file containing a list of valid system shells. The list below contains the default shells from the shells(4) man page. Procedure (the command is 24 lines long): cat >/etc/shells </bin/bash /bin/csh /bin/jsh /bin/ksh /bin/pfcsh /bin/pfksh /bin/pfsh /bin/sh /bin/tcsh /bin/zsh /sbin/jsh /sbin/sh /usr/bin/bash /usr/bin/csh /usr/bin/jsh /usr/bin/ksh /usr/bin/pfcsh /usr/bin/pfksh /usr/bin/pfsh /usr/bin/sh /usr/bin/tcsh /usr/bin/zsh EOF

Fix Text (F-34658r1_fix)

Create a /etc/shells file containing a list of valid system shells. The list below contains the default shells from the shells(4) man page.

Procedure (the command is 24 lines long):
cat >/etc/shells </bin/bash
/bin/csh
/bin/jsh
/bin/ksh
/bin/pfcsh
/bin/pfksh
/bin/pfsh
/bin/sh
/bin/tcsh
/bin/zsh
/sbin/jsh
/sbin/sh
/usr/bin/bash
/usr/bin/csh
/usr/bin/jsh
/usr/bin/ksh
/usr/bin/pfcsh
/usr/bin/pfksh
/usr/bin/pfsh
/usr/bin/sh
/usr/bin/tcsh
/usr/bin/zsh
EOF