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125 lines
3.9 KiB
Bash
Executable File
125 lines
3.9 KiB
Bash
Executable File
#!/bin/bash
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# run-shellcheck
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#
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# CIS Debian Hardening
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#
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#
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# 4.2.1.6 Ensure remote syslog-ng messages are only accepted on designated log hosts. (Not 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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# shellcheck disable=2034
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HARDENING_LEVEL=3
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# shellcheck disable=2034
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DESCRIPTION="Configure syslog to accept remote syslog messages only on designated log hosts."
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PACKAGE='syslog-ng'
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SYSLOG_BASEDIR='/etc/syslog-ng'
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REMOTE_HOST=""
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PATTERN='source[[:alnum:][:space:]*_*{]+(tcp|network|udp)[[:space:]]*\([[:space:]]*\"?[[:alnum:]\-.]+\"?.'
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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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is_pkg_installed "$PACKAGE"
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if [ "$FNRET" != 0 ]; then
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crit "$PACKAGE is not installed!"
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else
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FOUND=0
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FILES="$SYSLOG_BASEDIR/syslog-ng.conf $($SUDO_CMD find -L "$SYSLOG_BASEDIR"/conf.d/ -type f)"
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for FILE in $FILES; do
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does_pattern_exist_in_file_multiline "$FILE" "$PATTERN"
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if [ "$FNRET" = 0 ]; then
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FOUND=1
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fi
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done
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if [[ "$REMOTE_HOST" ]] && [[ "$REMOTE_HOST" != 'false' ]]; then
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info "This is the remote host, checking that it only accepts logs from specified zone"
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if [ "$FOUND" = 1 ]; then
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ok "$PATTERN is present in $FILES"
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else
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crit "$PATTERN is not present in $FILES"
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fi
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else
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info "This is the not the remote host checking that it doesn't accept remote logs"
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if [ "$FOUND" = 1 ]; then
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crit "$PATTERN is present in $FILES"
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else
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ok "$PATTERN is not present in $FILES"
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fi
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fi
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fi
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}
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# This function will be called if the script status is on enabled mode
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apply() {
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is_pkg_installed "$PACKAGE"
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if [ "$FNRET" != 0 ]; then
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crit "$PACKAGE is not installed!"
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else
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FOUND=0
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FILES="$SYSLOG_BASEDIR/syslog-ng.conf $(find -L "$SYSLOG_BASEDIR"/conf.d/ -type f)"
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for FILE in $FILES; do
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does_pattern_exist_in_file_multiline "$FILE" "$PATTERN"
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if [ "$FNRET" = 0 ]; then
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FOUND=1
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fi
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done
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if [[ "$REMOTE_HOST" ]] && [[ "$REMOTE_HOST" != 'false' ]]; then
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info "This is the remote host, checking that it only accepts logs from specified zone"
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if [ "$FOUND" = 1 ]; then
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ok "$PATTERN is present in $FILES"
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else
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crit "$PATTERN is not present in $FILES, setup the machine to receive the logs"
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fi
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else
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info "This is the not the remote host checking that it doesn't accept remote logs"
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if [ "$FOUND" = 1 ]; then
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warn "$PATTERN is present in $FILES, "
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else
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ok "$PATTERN is not present in $FILES"
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fi
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fi
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fi
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}
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# This function will create the config file for this check with default values
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create_config() {
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cat <<EOF
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status=audit
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SYSLOG_BASEDIR='/etc/syslog-ng'
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# Put here if it's the remote host or not
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REMOTE_HOST=false
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EOF
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}
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# This function will check config parameters required
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check_config() {
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:
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}
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# Source Root Dir Parameter
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if [ -r /etc/default/cis-hardening ]; then
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# shellcheck source=../../debian/default
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. /etc/default/cis-hardening
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fi
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if [ -z "$CIS_LIB_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_LIB_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 "${CIS_LIB_DIR}"/main.sh ]; then
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# shellcheck source=../../lib/main.sh
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. "${CIS_LIB_DIR}"/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_LIB_DIR in /etc/default/cis-hardening"
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exit 128
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fi
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