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#!/bin/sh
#################################################################################
#
# Lynis
# ------------------
#
# Copyright 2007-2014, Michael Boelen (michael@rootkit.nl), The Netherlands
# Web site: http://www.rootkit.nl
#
# Lynis comes with ABSOLUTELY NO WARRANTY. This is free software, and you are
# welcome to redistribute it under the terms of the GNU General Public License.
# See LICENSE file for usage of this software.
#
#################################################################################
#
# Shells
#
#################################################################################
#
IDLE_TIMEOUT=0
InsertSection "Shells"
#
#################################################################################
#
# bash
# Files (interactive login shells): /etc/profile $HOME/.bash_profile
# $HOME/.bash_login $HOME/.profile
# Files (interactive non-login shells): $HOME/.bash_rc
# csh/tcsh
# Files: /etc/csh.cshrc /etc/csh.login
# zsh
# Files: /etc/zshenv /etc/zsh/zshenv $HOME/.zshenv /etc/zprofile
# /etc/zsh/zprofile $HOME/.zprofile /etc/zshrc /etc/zsh/zshrc
# $ZDOTDIR/.zshrc /etc/zlogin /etc/zsh/zlogin
SHELL_LOGIN_FILES="/etc/csh.cshrc /etc/csh.login /etc/zshenv /etc/zsh/zshenv
/etc/zprofile /etc/zsh/zprofile /etc/zshrc /etc/zsh/zshrc
/etc/zlogin /etc/zsh/zlogin"
#
#################################################################################
#
# Test : SHLL-6202
# Description : check all console TTYs in which root user can enter single user mode without password
Register --test-no SHLL-6202 --os FreeBSD --weight L --network NO --description "Check console TTYs"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Test: Checking console TTYs..."
FIND=`cat /etc/ttys | egrep '^console' | grep -v 'insecure'`
if [ "${FIND}" = "" ]; then
Display --indent 2 --text "- Checking console TTYs... " --result OK --color GREEN
logtext "Result: console is secured against single user mode without password."
else
Display --indent 2 --text "- Checking console TTYs... " --result WARNING --color RED
logtext "Result: Found insecure console in /etc/ttys. Single user mode login without password allowed!"
logtext "Output /etc/ttys:"
logtext "${FIND}"
ReportWarning ${TEST_NO} "M" "Found unprotected console in /etc/ttys"
#ReportSuggestion ${TEST_NO} "Change the console line from 'secure' to 'insecure'."
fi
fi
#
#################################################################################
#
# Test : SHLL-6214
# Description : check for idle session killing tools (timeoutd)
#
#################################################################################
#
# Test : SHLL-6211
# Description : which shells are available according /etc/shells
Register --test-no SHLL-6211 --weight L --network NO --description "Checking available and valid shells"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Test: Searching for /etc/shells..."
if [ -f /etc/shells ]; then
logtext "Result: Found /etc/shells file"
logtext "Test: Reading available shells from /etc/shells"
SSHELLS=`cat /etc/shells | grep "^/"`
CSSHELLS=0; CSSHELLS_ALL=0
Display --indent 2 --text "- Checking shells from /etc/shells..."
for I in ${SSHELLS}; do
CSSHELLS_ALL=`expr ${CSSHELLS_ALL} + 1`
report "available_shell[]=${I}"
# YYY add check for symlinked shells
if [ -f ${I} ]; then
logtext "Found installed shell: ${I}"
CSSHELLS=`expr ${CSSHELLS} + 1`
else
logtext "Shell ${I} not installed. Probably a dummy or non existing shell."
fi
done
Display --indent 4 --text "Result: found ${CSSHELLS_ALL} shells (valid shells: ${CSSHELLS})."
else
logtext "Result: /etc/shells not found, skipping test"
fi
fi
#
#################################################################################
#
# Test : SHLL-6220
# Description : check for idle session killing tools or settings
Register --test-no SHLL-6220 --weight L --network NO --description "Checking available and valid shells"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Test: Search for session timeout tools or settings in shell"
IsRunning timeoutd
if [ ${RUNNING} -eq 1 ]; then
IDLE_TIMEOUT=1
logtext "Result: found timeoutd process to kill idle sesions"
report="session_timeout_method=timeout daemon"
fi
IsRunning autolog
if [ ${RUNNING} -eq 1 ]; then
IDLE_TIMEOUT=1
logtext "Result: found autolog process to kill idle sesions"
report="session_timeout_method[]=autolog"
fi
if [ -f /etc/profile ]; then
FIND=`cat /etc/profile | grep '\(export[ \t]*\)\?TMOUT=' | tr -d ' ' | tr -d '\t' | grep -v "^#" | sed 's/export//' | sed 's/#.*//'`
if [ ! "${FIND}" = "" ]; then
N=0; IDLE_TIMEOUT=1
for I in ${FIND}; do
logtext "Output: ${I}"
N=`expr ${N} + 1`
done
if [ ${N} -eq 1 ]; then
logtext "Result: found TMOUT value configured in /etc/profile"
else
logtext "Result: found several TMOUT values configured in /etc/profile"
fi
report "session_timeout_method[]=profile"
else
logtext "Result: could not find TMOUT setting in /etc/profile"
fi
else
logtext "Result: skip /etc/profile test, file not available on this system"
fi
if [ -d /etc/profile.d ]; then
FIND=`cat /etc/profile.d/*.sh 2> /dev/null | grep '\(export[ \t]*\)\?TMOUT=' | tr -d ' ' | tr -d '\t' | grep -v "^#" | sed 's/export//' | sed 's/#.*//'`
if [ ! "${FIND}" = "" ]; then
N=0; IDLE_TIMEOUT=1
for I in ${FIND}; do
logtext "Output: ${I}"
N=`expr ${N} + 1`
done
if [ ${N} -eq 1 ]; then
logtext "Result: found TMOUT value configured in one of the files in /etc/profile.d directory"
else
logtext "Result: found several TMOUT values configured in one of the files in /etc/profile.d directory"
fi
report "session_timeout_method[]=profile"
else
logtext "Result: could not find TMOUT setting in /etc/profile.d/*.sh"
fi
else
logtext "Result: skip /etc/profile.d directory test, directory not available on this system"
fi
if [ ${IDLE_TIMEOUT} -eq 1 ]; then
Display --indent 4 --text "- Session timeout settings/tools" --result "FOUND" --color GREEN
AddHP 3 3
else
Display --indent 4 --text "- Session timeout settings/tools" --result "NONE" --color YELLOW
AddHP 1 3
fi
fi
#
#################################################################################
#
# Test : SHLL-6236
# Description : Check /etc/profile
#
#################################################################################
#
# Test : SHLL-6240
# Description : Check default umask
# Register --test-no SHLL-6240 --weight L --network NO --description "Check default umask"
# if [ ${SKIPTEST} -eq 0 ]; then
# logtext "Test: Checking /etc/profile..."
# if [ -f /etc/profile ]; then
# FIND=`grep "^umask" | awk '{ print $2 }'`
# if [ "${FIND}" = "" ]; then
# logtext "Result: xxx"
# Display --indent 2 --text "- Checking default umask... " --result OK --color GREEN
# else
# logtext "Result: xxx"
# Display --indent 2 --text "- Checking default umask... " --result WARNING --color RED
# #ReportWarning ${TEST_NO} "M" "xxx"
# #ReportSuggestion ${TEST_NO} "xxx"
# fi
# fi
# fi
#
#################################################################################
#
# Test : SHLL-6250
# Description : Check /etc/bash.bashrc
# Register --test-no SHLL-6250 --weight L --network NO --description "Check default umask"
# if [ ${SKIPTEST} -eq 0 ]; then
#
#################################################################################
#
report "session_timeout_enabled=${IDLE_TIMEOUT}"
wait_for_keypress
#
#================================================================================
# Lynis - Copyright 2007-2014, Michael Boelen - www.rootkit.nl - The Netherlands
|
