代码审计：ecshop2.73 api.php两处SQL注入漏洞附利用

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漏洞出现在api.php 文件

witch ($_POST['act']) 
  
{ 
  
case 'search_goods_list': search_goods_list(); break; 
  
case 'search_products_list': search_products_list(); break; 
  
...... 
  
} 
  
function search_products_list() 
  
{ 
  
check_auth();  
  
...... 
  
if (!empty($_POST['goods_id']) && is_numeric($_POST['goods_id']) || !empty($_POST['bn'])) //goods_id不为数字,bn不为空.假假得假,假真得真. 
  
{ 
  
$sql = 'SELECT goods_id, last_update AS last_modify, shop_price AS price, goods_sn AS bn, goods_name AS name, goods_weight AS weight, goods_number AS store, add_time AS uptime' . 
  
' FROM ' . $GLOBALS['ecs']->table('goods') . 
  
' WHERE ' . empty($_POST['bn']) ? "goods_id = $_POST[goods_id]" : "goods_sn = $_POST[bn]"; //bn带入查询. 
  
$goods_data = $GLOBALS['db']->getRow($sql); 
  
...... 
  
} 
  
function search_goods_list() 
  
{ 
  
...... 
  
$page = empty($_POST['pages']) ? 1 : $_POST['pages']; //没过滤  
  
  
  
$counts = empty($_POST['counts']) ? 100 : $_POST['counts']; //没过滤. 1 union select 1,user() 
  
  
  
$sql = 'SELECT goods_id, last_update AS last_modify' . 
  
' FROM ' . $GLOBALS['ecs']->table('goods') . 
  
" WHERE is_delete = 0 AND is_on_sale = 1 AND (last_update > '" . $_POST['last_modify_st_time'] . "' OR last_update = 0)". 
  
" LIMIT ".($page - 1) * $counts . ', ' . $counts;//联合查询select...limit 1,1 union select 1,user() 
  
$date_arr = $GLOBALS['db']->getAll($sql); 
  
) 
  
function check_auth() 
  
{ 
  
$license = get_shop_license(); // 取出网店 license信息 
  
if (empty($license['certificate_id']) || empty($license['token']) || empty($license['certi'])) 
  
{ 
  
api_err('0x006', 'no certificate'); //没有证书数据，输出系统级错误:用户权限不够 
  
} 
  
if (!check_shopex_ac($_POST, $license['token'])) //带入token,需要知道数据库里token的值. 
  
{ 
  
api_err('0x009'); //输出系统级错误:签名无效 
  
} 
  
/* 对应用申请的session进行验证 */
  
$certi['certificate_id'] = $license['certificate_id']; // 网店证书ID 
  
$certi['app_id'] = 'ecshop_b2c'; // 说明客户端来源 
  
$certi['app_instance_id'] = 'webcollect'; // 应用服务ID 
  
$certi['version'] = VERSION . '#' . RELEASE; // 网店软件版本号 
  
$certi['format'] = 'json'; // 官方返回数据格式 
  
$certi['certi_app'] = 'sess.valid_session'; // 证书方法 
  
$certi['certi_session'] = $_POST['app_session']; //应用服务器申请的session值 
  
$certi['certi_ac'] = make_shopex_ac($certi, $license['token']); // 网店验证字符串 
  
  
  
$request_arr = exchange_shop_license($certi, $license); 
  
  
  
if ($request_arr['res'] != 'succ') 
  
{ 
  
api_err('0x001', 'session is invalid'); //输出系统级错误:身份验证失败 
  
} 
  
  
  
} 
  
function check_shopex_ac($post_params,$token) 
  
{ 
  
ksort($post_params); 
  
$str = ''; 
  
foreach($post_params as $key=>$value) 
  
{ 
  
if ($key!='ac') 
  
{ 
  
$str.=$value; 
  
} 
  
} 
  
if ($post_params['ac'] == md5($str.$token))//ac的值要等于提交的参数加上$license['token']的值的md5码. 
  
{  
  
return true; 
  
} 
  
else
  
{ 
  
return true; 
  
} 
  
}

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