ecshop /includes/modules/payment/alipay.php SQL Injection Vul SQL注入漏洞修复- 推酷

 

来源: ecshop /includes/modules/payment/alipay.php SQL Injection Vul – 推酷

catalog

1. 漏洞描述
2. 漏洞触发条件
3. 漏洞影响范围
4. 漏洞代码分析
5. 防御方法
6. 攻防思考

1. 漏洞描述

ECSHOP支付插件存在SQL注入漏洞,此漏洞存在于/includes/modules/payment/alipay.php文件中,该文件是ECshop的支付宝插件。由于ECShop使用了str_replace函数做字符串替换,黑客可绕过单引号限制构造SQL注入语句。只要开启支付宝支付插件就能利用该漏洞获取网站数据,且不需要注册登入。GBK与UTF-8版本ECshop均存在此漏洞

Relevant Link:

http://sebug.net/vuldb/ssvid-60643

2. 漏洞触发条件

3. 漏洞影响范围

4. 漏洞代码分析

/includes/modules/payment/alipay.php

function respond()
{
	if (!empty($_POST))
	{
		foreach($_POST as $key => $data)
		{
		$_GET[$key] = $data;
		}
	}
	$payment  = get_payment($_GET['code']);
	$seller_email = rawurldecode($_GET['seller_email']);
	$order_sn = str_replace($_GET['subject'], '', $_GET['out_trade_no']);
	//未对$order_sn进行有效注入过滤
	$order_sn = trim($order_sn);  
	..

ECShop在/includes/init.php中有段代码会将外界传入的数据进行转义,比如单引号;同样在/includes/modules/payment/alipay.php中外界传入的$_GET[‘subject’]和$_GET[‘out_trade_no’]也是被转义过的,但是在该文件的str_replace()函数会将$_GET[‘out_trade_no’]中的$_GET[‘subject’]过滤掉(黑客输入转义符号,将转义符本身过滤叼),最后经过str_replace()函数处理后引入单引号,使闭合单引号重新获得攻击能力,触发SQL注入

Relevant Link:

http://sebug.net/vuldb/ssvid-61150

5. 防御方法

/includes/modules/payment/alipay.php

function respond()
{
	if (!empty($_POST))
	{
		foreach($_POST as $key => $data)
		{
		$_GET[$key] = $data;
		}
	}
	$payment  = get_payment($_GET['code']);
	$seller_email = rawurldecode($_GET['seller_email']);
	$order_sn = str_replace($_GET['subject'], '', $_GET['out_trade_no']);
	/* 对$order_sn进行有效过滤 */
	$order_sn = trim(addslashes($order_sn));
	/* */
	..

Relevant Link:

http://bbs.ecshop.com/viewthread.php?tid=1125380&extra=page=1&orderby=replies&filter=172800

6. 攻防思考

Copyright (c) 2015 LittleHann All rights reserved

分享到: 更多 (0)