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125 lines
3.5 KiB
Bash
Executable File
125 lines
3.5 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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# 5.1.8 Ensure at/cron is restricted to authorized users (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=2
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# shellcheck disable=2034
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DESCRIPTION="Restrict at/cron to authorized users."
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FILES_ABSENT='/etc/cron.deny /etc/at.deny'
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FILES_PRESENT='/etc/cron.allow /etc/at.allow'
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PERMISSIONS='644'
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PERMISSIONSOK='644 640 600 440 400'
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USER='root'
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GROUP='root'
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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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for FILE in $FILES_ABSENT; do
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does_file_exist "$FILE"
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if [ "$FNRET" = 0 ]; then
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crit "$FILE exists"
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else
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ok "$FILE is absent"
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fi
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done
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for FILE in $FILES_PRESENT; do
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does_file_exist "$FILE"
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if [ "$FNRET" != 0 ]; then
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crit "$FILE is absent, should exist"
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else
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has_file_correct_ownership "$FILE" "$USER" "$GROUP"
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if [ "$FNRET" = 0 ]; then
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ok "$FILE has correct ownership"
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else
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crit "$FILE ownership was not set to $USER:$GROUP"
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fi
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has_file_one_of_permissions "$FILE" "$PERMISSIONSOK"
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if [ "$FNRET" = 0 ]; then
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ok "$FILE has correct permissions"
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else
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crit "$FILE permissions were not set to $PERMISSIONS"
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fi
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fi
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done
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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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for FILE in $FILES_ABSENT; do
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does_file_exist "$FILE"
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if [ "$FNRET" = 0 ]; then
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warn "$FILE exists"
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rm "$FILE"
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else
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ok "$FILE is absent"
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fi
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done
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for FILE in $FILES_PRESENT; do
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does_file_exist "$FILE"
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if [ "$FNRET" != 0 ]; then
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warn "$FILE is absent, fixing (touch)"
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touch "$FILE"
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fi
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has_file_correct_ownership "$FILE" "$USER" "$GROUP"
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if [ "$FNRET" = 0 ]; then
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ok "$FILE has correct ownership"
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else
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warn "fixing $FILE ownership to $USER:$GROUP"
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chown "$USER":"$GROUP" "$FILE"
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fi
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has_file_one_of_permissions "$FILE" "$PERMISSIONSOK"
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if [ "$FNRET" = 0 ]; then
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ok "$FILE has correct permissions"
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else
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warn "$FILE permissions were not set to $PERMISSIONS"
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chmod 0"$PERMISSIONS" "$FILE"
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fi
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done
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}
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# This function will check config parameters required
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check_config() {
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does_user_exist "$USER"
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if [ "$FNRET" != 0 ]; then
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crit "$USER does not exist"
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exit 128
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fi
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does_group_exist "$GROUP"
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if [ "$FNRET" != 0 ]; then
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crit "$GROUP does not exist"
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exit 128
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fi
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}
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# Source Root Dir Parameter
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if [ -r /etc/default/cis-hardening ]; then
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# shellcheck source=../../debian/default
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. /etc/default/cis-hardening
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fi
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if [ -z "$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 "$CIS_ROOT_DIR"/lib/main.sh ]; then
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# shellcheck source=../../lib/main.sh
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. "$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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