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存在一个盲注漏洞,问题存在于/api/client/api.php文件中,提交特制的恶意POST请求可进行SQL注入攻击,可获得敏感信息或操作数据库
http://sebug.net/vuldb/ssvid-21007
2. 漏洞触发条件
1. /api/client/api.php存在未过滤漏洞 2. 服务器magic_quote_gpc = off //magic_quote_gpc特性已自 PHP 5.3.0 起废弃并将自 PHP 5.4.0 起移除,即默认情况下,magic_quote_gpc = Off
0x1: POC
http://localhost/ecshop2.7.2/api/client/api.php?Action=UserLogin POST: UserId=%27%20or%20user_id=1%23
Relevant Link:
http://php.net/manual/zh/info.configuration.php
3. 漏洞影响范围
4. 漏洞代码分析
/api/client/api.php
<?php define('IN_ECS', true); include_once './includes/init.php'; //分发处理POST数据 dispatch($_POST); ?>
/api/client/includes/lib_api.php
function dispatch($post) { // 分发器数组 $func_arr = array('GetDomain', 'UserLogin', 'AddCategory', 'AddBrand', 'AddGoods', 'GetCategory', 'GetBrand', 'GetGoods', 'DeleteBrand', 'DeleteCategory', 'DeleteGoods', 'EditBrand', 'EditCategory', 'EditGoods'); //当$_POST['Action'] == 'UserLogin'的时候调用API_UserLogin if(in_array($post['Action'], $func_arr) && function_exists('API_'.$post['Action'])) { return call_user_func('API_'.$post['Action'], $post); } else { API_Error(); } }
/api/client/includes/lib_api.php
function API_UserLogin($post) { $post['username'] = isset($post['UserId']) ? trim($post['UserId']) : ''; $post['password'] = isset($post['Password']) ? strtolower(trim($post['Password'])) : ''; /* 检查密码是否正确 */ //$post['username']未进行过滤,造成盲注漏洞,参数是直接从原始$_POST获取的,未进行任何预处理,不受内核过滤影响 $sql = "SELECT user_id, user_name, password, action_list, last_login". " FROM " . $GLOBALS['ecs']->table('admin_user') . " WHERE user_name = '" . $post['username']. "'"; $row = $GLOBALS['db']->getRow($sql); ..
Relevant Link:
http://www.wooyun.org/bugs/wooyun-2010-02969
5. 防御方法
/api/client/includes/lib_api.php
function API_UserLogin($post) { /* SQL注入过滤 */ if (get_magic_quotes_gpc()) { $post['UserId'] = $post['UserId'] } else { $post['UserId'] = addslashes($post['UserId']); } /* */ $post['username'] = isset($post['UserId']) ? trim($post['UserId']) : ''; ..
转载请注明:苏demo的别样人生 » ecshop /api/client/api.php、/api/client/includes/lib_api.php SQL Injection Vul