Program: CWE-79
Project: CVE-2018-18671
Buggy source:
<?php
$sub_menu = "100100";
include_once('./_common.php');

check_demo();

auth_check($auth[$sub_menu], 'w');

if ($is_admin != 'super')
    alert('최고관리자만 접근 가능합니다.');

$mb = get_member($cf_admin);
if (!$mb['mb_id'])
    alert('최고관리자 회원아이디가 존재하지 않습니다.');

check_admin_token();

// 본인확인을 사용할 경우 아이핀, 휴대폰인증 중 하나는 선택되어야 함
if($_POST['cf_cert_use'] && !$_POST['cf_cert_ipin'] && !$_POST['cf_cert_hp'])
    alert('본인확인을 위해 아이핀 또는 휴대폰 본인학인 서비스를 하나이상 선택해 주십시오');

if(!$_POST['cf_cert_use']) {
    $_POST['cf_cert_ipin'] = '';
    $_POST['cf_cert_hp'] = '';
}

$cf_social_servicelist = !empty($_POST['cf_social_servicelist']) ? implode(',', $_POST['cf_social_servicelist']) : '';

$sql = " update {$g5['config_table']}
            set cf_title = '{$_POST['cf_title']}',
                cf_admin = '{$_POST['cf_admin']}',
                cf_admin_email = '{$_POST['cf_admin_email']}',
                cf_admin_email_name = '{$_POST['cf_admin_email_name']}',
                cf_add_script = '{$_POST['cf_add_script']}',
                cf_use_point = '{$_POST['cf_use_point']}',
                cf_point_term = '{$_POST['cf_point_term']}',
                cf_use_copy_log = '{$_POST['cf_use_copy_log']}',
                cf_use_email_certify = '{$_POST['cf_use_email_certify']}',
                cf_login_point = '{$_POST['cf_login_point']}',
                cf_cut_name = '{$_POST['cf_cut_name']}',
                cf_nick_modify = '{$_POST['cf_nick_modify']}',
                cf_new_skin = '{$_POST['cf_new_skin']}',
                cf_new_rows = '{$_POST['cf_new_rows']}',
                cf_search_skin = '{$_POST['cf_search_skin']}',
                cf_connect_skin = '{$_POST['cf_connect_skin']}',
                cf_faq_skin = '{$_POST['cf_faq_skin']}',
                cf_read_point = '{$_POST['cf_read_point']}',
                cf_write_point = '{$_POST['cf_write_point']}',
                cf_comment_point = '{$_POST['cf_comment_point']}',
                cf_download_point = '{$_POST['cf_download_point']}',
                cf_write_pages = '{$_POST['cf_write_pages']}',
                cf_mobile_pages = '{$_POST['cf_mobile_pages']}',
                cf_link_target = '{$_POST['cf_link_target']}',
                cf_delay_sec = '{$_POST['cf_delay_sec']}',
                cf_filter = '{$_POST['cf_filter']}',
                cf_possible_ip = '".trim($_POST['cf_possible_ip'])."',
                cf_intercept_ip = '".trim($_POST['cf_intercept_ip'])."',
                cf_analytics = '{$_POST['cf_analytics']}',
                cf_add_meta = '{$_POST['cf_add_meta']}',
                cf_syndi_token = '{$_POST['cf_syndi_token']}',
                cf_syndi_except = '{$_POST['cf_syndi_except']}',
                cf_member_skin = '{$_POST['cf_member_skin']}',
                cf_use_homepage = '{$_POST['cf_use_homepage']}',
                cf_req_homepage = '{$_POST['cf_req_homepage']}',
                cf_use_tel = '{$_POST['cf_use_tel']}',
                cf_req_tel = '{$_POST['cf_req_tel']}',
                cf_use_hp = '{$_POST['cf_use_hp']}',
                cf_req_hp = '{$_POST['cf_req_hp']}',
                cf_use_addr = '{$_POST['cf_use_addr']}',
                cf_req_addr = '{$_POST['cf_req_addr']}',
                cf_use_signature = '{$_POST['cf_use_signature']}',
                cf_req_signature = '{$_POST['cf_req_signature']}',
                cf_use_profile = '{$_POST['cf_use_profile']}',
                cf_req_profile = '{$_POST['cf_req_profile']}',
                cf_register_level = '{$_POST['cf_register_level']}',
                cf_register_point = '{$_POST['cf_register_point']}',
                cf_icon_level = '{$_POST['cf_icon_level']}',
                cf_use_recommend = '{$_POST['cf_use_recommend']}',
                cf_recommend_point = '{$_POST['cf_recommend_point']}',
                cf_leave_day = '{$_POST['cf_leave_day']}',
                cf_search_part = '{$_POST['cf_search_part']}',
                cf_email_use = '{$_POST['cf_email_use']}',
                cf_email_wr_super_admin = '{$_POST['cf_email_wr_super_admin']}',
                cf_email_wr_group_admin = '{$_POST['cf_email_wr_group_admin']}',
                cf_email_wr_board_admin = '{$_POST['cf_email_wr_board_admin']}',
                cf_email_wr_write = '{$_POST['cf_email_wr_write']}',
                cf_email_wr_comment_all = '{$_POST['cf_email_wr_comment_all']}',
                cf_email_mb_super_admin = '{$_POST['cf_email_mb_super_admin']}',
                cf_email_mb_member = '{$_POST['cf_email_mb_member']}',
                cf_email_po_super_admin = '{$_POST['cf_email_po_super_admin']}',
                cf_prohibit_id = '{$_POST['cf_prohibit_id']}',
                cf_prohibit_email = '{$_POST['cf_prohibit_email']}',
                cf_new_del = '{$_POST['cf_new_del']}',
                cf_memo_del = '{$_POST['cf_memo_del']}',
                cf_visit_del = '{$_POST['cf_visit_del']}',
                cf_popular_del = '{$_POST['cf_popular_del']}',
                cf_use_member_icon = '{$_POST['cf_use_member_icon']}',
                cf_member_icon_size = '{$_POST['cf_member_icon_size']}',
                cf_member_icon_width = '{$_POST['cf_member_icon_width']}',
                cf_member_icon_height = '{$_POST['cf_member_icon_height']}',
                cf_member_img_size = '{$_POST['cf_member_img_size']}',
                cf_member_img_width = '{$_POST['cf_member_img_width']}',
                cf_member_img_height = '{$_POST['cf_member_img_height']}',
                cf_login_minutes = '{$_POST['cf_login_minutes']}',
                cf_image_extension = '{$_POST['cf_image_extension']}',
                cf_flash_extension = '{$_POST['cf_flash_extension']}',
                cf_movie_extension = '{$_POST['cf_movie_extension']}',
                cf_formmail_is_member = '{$_POST['cf_formmail_is_member']}',
                cf_page_rows = '{$_POST['cf_page_rows']}',
                cf_mobile_page_rows = '{$_POST['cf_mobile_page_rows']}',
                cf_stipulation = '{$_POST['cf_stipulation']}',
                cf_privacy = '{$_POST['cf_privacy']}',
                cf_open_modify = '{$_POST['cf_open_modify']}',
                cf_memo_send_point = '{$_POST['cf_memo_send_point']}',
                cf_mobile_new_skin = '{$_POST['cf_mobile_new_skin']}',
                cf_mobile_search_skin = '{$_POST['cf_mobile_search_skin']}',
                cf_mobile_connect_skin = '{$_POST['cf_mobile_connect_skin']}',
                cf_mobile_faq_skin = '{$_POST['cf_mobile_faq_skin']}',
                cf_mobile_member_skin = '{$_POST['cf_mobile_member_skin']}',
                cf_captcha_mp3 = '{$_POST['cf_captcha_mp3']}',
                cf_editor = '{$_POST['cf_editor']}',
                cf_cert_use = '{$_POST['cf_cert_use']}',
                cf_cert_ipin = '{$_POST['cf_cert_ipin']}',
                cf_cert_hp = '{$_POST['cf_cert_hp']}',
                cf_cert_kcb_cd = '{$_POST['cf_cert_kcb_cd']}',
                cf_cert_kcp_cd = '{$_POST['cf_cert_kcp_cd']}',
                cf_lg_mid = '{$_POST['cf_lg_mid']}',
                cf_lg_mert_key = '{$_POST['cf_lg_mert_key']}',
                cf_cert_limit = '{$_POST['cf_cert_limit']}',
                cf_cert_req = '{$_POST['cf_cert_req']}',
                cf_sms_use = '{$_POST['cf_sms_use']}',
                cf_sms_type = '{$_POST['cf_sms_type']}',
                cf_icode_id = '{$_POST['cf_icode_id']}',
                cf_icode_pw = '{$_POST['cf_icode_pw']}',
                cf_icode_server_ip = '{$_POST['cf_icode_server_ip']}',
                cf_icode_server_port = '{$_POST['cf_icode_server_port']}',
                cf_googl_shorturl_apikey = '{$_POST['cf_googl_shorturl_apikey']}',
                cf_kakao_js_apikey = '{$_POST['cf_kakao_js_apikey']}',
                cf_facebook_appid = '{$_POST['cf_facebook_appid']}',
                cf_facebook_secret = '{$_POST['cf_facebook_secret']}',
                cf_twitter_key = '{$_POST['cf_twitter_key']}',
                cf_twitter_secret = '{$_POST['cf_twitter_secret']}',
                cf_social_login_use = '{$_POST['cf_social_login_use']}',
                cf_naver_clientid = '{$_POST['cf_naver_clientid']}',
                cf_naver_secret = '{$_POST['cf_naver_secret']}',
                cf_google_clientid = '{$_POST['cf_google_clientid']}',
                cf_google_secret = '{$_POST['cf_google_secret']}',
                cf_kakao_rest_key = '{$_POST['cf_kakao_rest_key']}',
                cf_kakao_client_secret = '{$_POST['cf_kakao_client_secret']}',
                cf_social_servicelist   =   '{$cf_social_servicelist}',
                cf_captcha = '{$_POST['cf_captcha']}',
                cf_recaptcha_site_key = '{$_POST['cf_recaptcha_site_key']}',
                cf_recaptcha_secret_key   =   '{$_POST['cf_recaptcha_secret_key']}',
                cf_payco_clientid = '{$_POST['cf_payco_clientid']}',
                cf_payco_secret = '{$_POST['cf_payco_secret']}',
                cf_1_subj = '{$_POST['cf_1_subj']}',
                cf_2_subj = '{$_POST['cf_2_subj']}',
                cf_3_subj = '{$_POST['cf_3_subj']}',
                cf_4_subj = '{$_POST['cf_4_subj']}',
                cf_5_subj = '{$_POST['cf_5_subj']}',
                cf_6_subj = '{$_POST['cf_6_subj']}',
                cf_7_subj = '{$_POST['cf_7_subj']}',
                cf_8_subj = '{$_POST['cf_8_subj']}',
                cf_9_subj = '{$_POST['cf_9_subj']}',
                cf_10_subj = '{$_POST['cf_10_subj']}',
                cf_1 = '{$_POST['cf_1']}',
                cf_2 = '{$_POST['cf_2']}',
                cf_3 = '{$_POST['cf_3']}',
                cf_4 = '{$_POST['cf_4']}',
                cf_5 = '{$_POST['cf_5']}',
                cf_6 = '{$_POST['cf_6']}',
                cf_7 = '{$_POST['cf_7']}',
                cf_8 = '{$_POST['cf_8']}',
                cf_9 = '{$_POST['cf_9']}',
                cf_10 = '{$_POST['cf_10']}' ";
sql_query($sql);

//sql_query(" OPTIMIZE TABLE `$g5[config_table]` ");

goto_url('./config_form.php', false);
?>

Fixed version (ground truth):
<?php
$sub_menu = "100100";
include_once('./_common.php');

check_demo();

auth_check($auth[$sub_menu], 'w');

if ($is_admin != 'super')
    alert('최고관리자만 접근 가능합니다.');

$mb = get_member($cf_admin);
if (!$mb['mb_id'])
    alert('최고관리자 회원아이디가 존재하지 않습니다.');

check_admin_token();

// 본인확인을 사용할 경우 아이핀, 휴대폰인증 중 하나는 선택되어야 함
if($_POST['cf_cert_use'] && !$_POST['cf_cert_ipin'] && !$_POST['cf_cert_hp'])
    alert('본인확인을 위해 아이핀 또는 휴대폰 본인학인 서비스를 하나이상 선택해 주십시오');

if(!$_POST['cf_cert_use']) {
    $_POST['cf_cert_ipin'] = '';
    $_POST['cf_cert_hp'] = '';
}

$cf_social_servicelist = !empty($_POST['cf_social_servicelist']) ? implode(',', $_POST['cf_social_servicelist']) : '';

$_POST['cf_title'] = strip_tags($_POST['cf_title']);

$sql = " update {$g5['config_table']}
            set cf_title = '{$_POST['cf_title']}',
                cf_admin = '{$_POST['cf_admin']}',
                cf_admin_email = '{$_POST['cf_admin_email']}',
                cf_admin_email_name = '{$_POST['cf_admin_email_name']}',
                cf_add_script = '{$_POST['cf_add_script']}',
                cf_use_point = '{$_POST['cf_use_point']}',
                cf_point_term = '{$_POST['cf_point_term']}',
                cf_use_copy_log = '{$_POST['cf_use_copy_log']}',
                cf_use_email_certify = '{$_POST['cf_use_email_certify']}',
                cf_login_point = '{$_POST['cf_login_point']}',
                cf_cut_name = '{$_POST['cf_cut_name']}',
                cf_nick_modify = '{$_POST['cf_nick_modify']}',
                cf_new_skin = '{$_POST['cf_new_skin']}',
                cf_new_rows = '{$_POST['cf_new_rows']}',
                cf_search_skin = '{$_POST['cf_search_skin']}',
                cf_connect_skin = '{$_POST['cf_connect_skin']}',
                cf_faq_skin = '{$_POST['cf_faq_skin']}',
                cf_read_point = '{$_POST['cf_read_point']}',
                cf_write_point = '{$_POST['cf_write_point']}',
                cf_comment_point = '{$_POST['cf_comment_point']}',
                cf_download_point = '{$_POST['cf_download_point']}',
                cf_write_pages = '{$_POST['cf_write_pages']}',
                cf_mobile_pages = '{$_POST['cf_mobile_pages']}',
                cf_link_target = '{$_POST['cf_link_target']}',
                cf_delay_sec = '{$_POST['cf_delay_sec']}',
                cf_filter = '{$_POST['cf_filter']}',
                cf_possible_ip = '".trim($_POST['cf_possible_ip'])."',
                cf_intercept_ip = '".trim($_POST['cf_intercept_ip'])."',
                cf_analytics = '{$_POST['cf_analytics']}',
                cf_add_meta = '{$_POST['cf_add_meta']}',
                cf_syndi_token = '{$_POST['cf_syndi_token']}',
                cf_syndi_except = '{$_POST['cf_syndi_except']}',
                cf_member_skin = '{$_POST['cf_member_skin']}',
                cf_use_homepage = '{$_POST['cf_use_homepage']}',
                cf_req_homepage = '{$_POST['cf_req_homepage']}',
                cf_use_tel = '{$_POST['cf_use_tel']}',
                cf_req_tel = '{$_POST['cf_req_tel']}',
                cf_use_hp = '{$_POST['cf_use_hp']}',
                cf_req_hp = '{$_POST['cf_req_hp']}',
                cf_use_addr = '{$_POST['cf_use_addr']}',
                cf_req_addr = '{$_POST['cf_req_addr']}',
                cf_use_signature = '{$_POST['cf_use_signature']}',
                cf_req_signature = '{$_POST['cf_req_signature']}',
                cf_use_profile = '{$_POST['cf_use_profile']}',
                cf_req_profile = '{$_POST['cf_req_profile']}',
                cf_register_level = '{$_POST['cf_register_level']}',
                cf_register_point = '{$_POST['cf_register_point']}',
                cf_icon_level = '{$_POST['cf_icon_level']}',
                cf_use_recommend = '{$_POST['cf_use_recommend']}',
                cf_recommend_point = '{$_POST['cf_recommend_point']}',
                cf_leave_day = '{$_POST['cf_leave_day']}',
                cf_search_part = '{$_POST['cf_search_part']}',
                cf_email_use = '{$_POST['cf_email_use']}',
                cf_email_wr_super_admin = '{$_POST['cf_email_wr_super_admin']}',
                cf_email_wr_group_admin = '{$_POST['cf_email_wr_group_admin']}',
                cf_email_wr_board_admin = '{$_POST['cf_email_wr_board_admin']}',
                cf_email_wr_write = '{$_POST['cf_email_wr_write']}',
                cf_email_wr_comment_all = '{$_POST['cf_email_wr_comment_all']}',
                cf_email_mb_super_admin = '{$_POST['cf_email_mb_super_admin']}',
                cf_email_mb_member = '{$_POST['cf_email_mb_member']}',
                cf_email_po_super_admin = '{$_POST['cf_email_po_super_admin']}',
                cf_prohibit_id = '{$_POST['cf_prohibit_id']}',
                cf_prohibit_email = '{$_POST['cf_prohibit_email']}',
                cf_new_del = '{$_POST['cf_new_del']}',
                cf_memo_del = '{$_POST['cf_memo_del']}',
                cf_visit_del = '{$_POST['cf_visit_del']}',
                cf_popular_del = '{$_POST['cf_popular_del']}',
                cf_use_member_icon = '{$_POST['cf_use_member_icon']}',
                cf_member_icon_size = '{$_POST['cf_member_icon_size']}',
                cf_member_icon_width = '{$_POST['cf_member_icon_width']}',
                cf_member_icon_height = '{$_POST['cf_member_icon_height']}',
                cf_member_img_size = '{$_POST['cf_member_img_size']}',
                cf_member_img_width = '{$_POST['cf_member_img_width']}',
                cf_member_img_height = '{$_POST['cf_member_img_height']}',
                cf_login_minutes = '{$_POST['cf_login_minutes']}',
                cf_image_extension = '{$_POST['cf_image_extension']}',
                cf_flash_extension = '{$_POST['cf_flash_extension']}',
                cf_movie_extension = '{$_POST['cf_movie_extension']}',
                cf_formmail_is_member = '{$_POST['cf_formmail_is_member']}',
                cf_page_rows = '{$_POST['cf_page_rows']}',
                cf_mobile_page_rows = '{$_POST['cf_mobile_page_rows']}',
                cf_stipulation = '{$_POST['cf_stipulation']}',
                cf_privacy = '{$_POST['cf_privacy']}',
                cf_open_modify = '{$_POST['cf_open_modify']}',
                cf_memo_send_point = '{$_POST['cf_memo_send_point']}',
                cf_mobile_new_skin = '{$_POST['cf_mobile_new_skin']}',
                cf_mobile_search_skin = '{$_POST['cf_mobile_search_skin']}',
                cf_mobile_connect_skin = '{$_POST['cf_mobile_connect_skin']}',
                cf_mobile_faq_skin = '{$_POST['cf_mobile_faq_skin']}',
                cf_mobile_member_skin = '{$_POST['cf_mobile_member_skin']}',
                cf_captcha_mp3 = '{$_POST['cf_captcha_mp3']}',
                cf_editor = '{$_POST['cf_editor']}',
                cf_cert_use = '{$_POST['cf_cert_use']}',
                cf_cert_ipin = '{$_POST['cf_cert_ipin']}',
                cf_cert_hp = '{$_POST['cf_cert_hp']}',
                cf_cert_kcb_cd = '{$_POST['cf_cert_kcb_cd']}',
                cf_cert_kcp_cd = '{$_POST['cf_cert_kcp_cd']}',
                cf_lg_mid = '{$_POST['cf_lg_mid']}',
                cf_lg_mert_key = '{$_POST['cf_lg_mert_key']}',
                cf_cert_limit = '{$_POST['cf_cert_limit']}',
                cf_cert_req = '{$_POST['cf_cert_req']}',
                cf_sms_use = '{$_POST['cf_sms_use']}',
                cf_sms_type = '{$_POST['cf_sms_type']}',
                cf_icode_id = '{$_POST['cf_icode_id']}',
                cf_icode_pw = '{$_POST['cf_icode_pw']}',
                cf_icode_server_ip = '{$_POST['cf_icode_server_ip']}',
                cf_icode_server_port = '{$_POST['cf_icode_server_port']}',
                cf_googl_shorturl_apikey = '{$_POST['cf_googl_shorturl_apikey']}',
                cf_kakao_js_apikey = '{$_POST['cf_kakao_js_apikey']}',
                cf_facebook_appid = '{$_POST['cf_facebook_appid']}',
                cf_facebook_secret = '{$_POST['cf_facebook_secret']}',
                cf_twitter_key = '{$_POST['cf_twitter_key']}',
                cf_twitter_secret = '{$_POST['cf_twitter_secret']}',
                cf_social_login_use = '{$_POST['cf_social_login_use']}',
                cf_naver_clientid = '{$_POST['cf_naver_clientid']}',
                cf_naver_secret = '{$_POST['cf_naver_secret']}',
                cf_google_clientid = '{$_POST['cf_google_clientid']}',
                cf_google_secret = '{$_POST['cf_google_secret']}',
                cf_kakao_rest_key = '{$_POST['cf_kakao_rest_key']}',
                cf_kakao_client_secret = '{$_POST['cf_kakao_client_secret']}',
                cf_social_servicelist   =   '{$cf_social_servicelist}',
                cf_captcha = '{$_POST['cf_captcha']}',
                cf_recaptcha_site_key = '{$_POST['cf_recaptcha_site_key']}',
                cf_recaptcha_secret_key   =   '{$_POST['cf_recaptcha_secret_key']}',
                cf_payco_clientid = '{$_POST['cf_payco_clientid']}',
                cf_payco_secret = '{$_POST['cf_payco_secret']}',
                cf_1_subj = '{$_POST['cf_1_subj']}',
                cf_2_subj = '{$_POST['cf_2_subj']}',
                cf_3_subj = '{$_POST['cf_3_subj']}',
                cf_4_subj = '{$_POST['cf_4_subj']}',
                cf_5_subj = '{$_POST['cf_5_subj']}',
                cf_6_subj = '{$_POST['cf_6_subj']}',
                cf_7_subj = '{$_POST['cf_7_subj']}',
                cf_8_subj = '{$_POST['cf_8_subj']}',
                cf_9_subj = '{$_POST['cf_9_subj']}',
                cf_10_subj = '{$_POST['cf_10_subj']}',
                cf_1 = '{$_POST['cf_1']}',
                cf_2 = '{$_POST['cf_2']}',
                cf_3 = '{$_POST['cf_3']}',
                cf_4 = '{$_POST['cf_4']}',
                cf_5 = '{$_POST['cf_5']}',
                cf_6 = '{$_POST['cf_6']}',
                cf_7 = '{$_POST['cf_7']}',
                cf_8 = '{$_POST['cf_8']}',
                cf_9 = '{$_POST['cf_9']}',
                cf_10 = '{$_POST['cf_10']}' ";
sql_query($sql);

//sql_query(" OPTIMIZE TABLE `$g5[config_table]` ");

goto_url('./config_form.php', false);
?>