108 lines
3.1 KiB
Bash
Executable File
108 lines
3.1 KiB
Bash
Executable File
#!/bin/bash
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#
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# harbian-audit for Debian GNU/Linux 7/8/9 Hardening
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#
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#
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# 9.3.14 Set SSH Banner (Scored)
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#
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set -e # One error, it's over
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set -u # One variable unset, it's over
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HARDENING_LEVEL=3
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PACKAGE='openssh-server'
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FILE='/etc/ssh/sshd_config'
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# This function will be called if the script status is on enabled / audit mode
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audit () {
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OPTIONS="Banner=$BANNER_FILE"
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is_pkg_installed $PACKAGE
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if [ $FNRET != 0 ]; then
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crit "$PACKAGE is not installed!"
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FNRET=5
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else
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ok "$PACKAGE is installed"
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SSH_PARAM=$(echo $OPTIONS | cut -d= -f 1)
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SSH_VALUE=$(echo $OPTIONS | cut -d= -f 2)
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check_sshd_conf_for_one_value_runtime $SSH_PARAM $SSH_VALUE
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if [ $FNRET = 0 ]; then
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ok "The value of keyword $SSH_PARAM has set to $SSH_VALUE, it's correct."
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FNRET=0
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else
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crit "The keyword value pair "\"$SSH_PARAM $SSH_VALUE\"" does not exist in the sshd runtime configuration."
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PATTERN="^$SSH_PARAM[[:space:]]*"
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PATTERN_INFO="$SSH_PARAM $SSH_VALUE"
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does_pattern_exist_in_file $FILE "$PATTERN"
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if [ $FNRET = 0 ]; then
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crit "The value of keyword $SSH_PARAM is not set to $SSH_VALUE, it's incorrect."
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FNRET=1
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else
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crit "$PATTERN_INFO is not present in $FILE"
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FNRET=2
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fi
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fi
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fi
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}
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# This function will be called if the script status is on enabled mode
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apply () {
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OPTIONS="Banner=$BANNER_FILE"
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SSH_PARAM=$(echo $OPTIONS | cut -d= -f 1)
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SSH_VALUE=$(echo $OPTIONS | cut -d= -f 2)
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PATTERN_INFO="$SSH_PARAM $SSH_VALUE"
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case $FNRET in
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0) ok "The value of keyword $SSH_PARAM has set to $SSH_VALUE, it's correct."
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;;
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1) warn "The value of keyword $SSH_PARAM is not set to $SSH_VALUE, it's incorrect. Fixing and reload config"
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replace_in_file $FILE "^$SSH_PARAM[[:space:]]*.*" "$SSH_PARAM $SSH_VALUE"
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/etc/init.d/ssh reload > /dev/null 2>&1
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;;
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2) warn "$PATTERN_INFO is not present in $FILE, need add to sshd_config and reload"
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add_end_of_file $FILE "$SSH_PARAM $SSH_VALUE"
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/etc/init.d/ssh reload > /dev/null 2>&1
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;;
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5) warn "$PACKAGE is absent, installing it"
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apt_install $PACKAGE
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;;
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*) ;;
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esac
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}
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# This function will create the config file for this check with default values
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create_config() {
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cat <<EOF
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status=disabled
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# Put here banner file, defaults to /etc/issue.net
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BANNER_FILE=""
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EOF
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}
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# This function will check config parameters required
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check_config() {
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if [ -z $BANNER_FILE ]; then
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info "BANNER_FILE is not set, defaults to wildcard"
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BANNER_FILE='/etc/issue.net'
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fi
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}
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# Source Root Dir Parameter
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if [ -r /etc/default/cis-hardening ]; then
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. /etc/default/cis-hardening
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fi
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if [ -z "$CIS_ROOT_DIR" ]; then
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echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
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echo "Cannot source CIS_ROOT_DIR variable, aborting."
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exit 128
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fi
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# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
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if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
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. $CIS_ROOT_DIR/lib/main.sh
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else
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echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
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exit 128
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fi
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