TA的每日心情 | 怒 2024-11-13 20:06 |
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签到天数: 1628 天 [LV.Master]伴坛终老
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一:goods_attr_id的二次注入
注入利用过程:
1.添加商品到购物车时,写入注入代码到商品属性id
http://localhost/test/ecshop/flow.php?step=add_to_cart
- POST: goods={"quick":1,"spec":["163","158'"],"goods_id":32,"number":"1","parent":0}
复制代码 注意,需要spec有两个或以上id
2.在查看购物车页面,点击更新购物车,执行注入代码(二次注入嘛,单引号可用了)
代码分析
1./includes/lib_goods.php 942行
- function spec_price($spec)
- {
- if (!empty($spec))
- {
- $where = db_create_in($spec, 'goods_attr_id'); //这里是注入位置,能控制$spec就可以了
- $sql = 'SELECT SUM(attr_price) AS attr_price FROM ' . $GLOBALS['ecs']->table('goods_attr') . " WHERE $where";
- $price = floatval($GLOBALS['db']->getOne($sql));
- }
- else
- {
- $price = 0;
- }
- return $price;
- }
复制代码 2./includes/lib_common.php 2266行get_final_price有spec_price的调用
3.再看get_final_price方法的调用 在ecshop/flow.php flow_update_cart方法,2272行
- /* 处理普通商品或非优惠的配件 */
- else
- {
- $attr_id = empty($goods['goods_attr_id']) ? array() : explode(',', $goods['goods_attr_id']); //看,$attr_id是读取的购物车商品的goods_attr_id字段,所以只要在添加商品到购物车时写入注入代码就可以了
- $goods_price = get_final_price($goods['goods_id'], $val, true, $attr_id);
- //更新购物车中的商品数量
- $sql = "UPDATE " .$GLOBALS['ecs']->table('cart').
- " SET goods_number = '$val', goods_price = '$goods_price' WHERE rec_id='$key' AND session_id='" . SESS_ID . "'";
复制代码 二:good_attr的二次注入
1.插入注入代码(goods_attr)至订单商品(/wholesale.php可以插入,即商品批发页面.
2.将1生成的订单在用户中心订单查看页执行“放回购物车”操作。
3.查看购物车页面,注入代码执行
代码分析:
1./includes/lib_order.php get_cart_goods()方法(读取购物车的商品),1626行起
- /* 查询规格 */
- if (trim($row['goods_attr']) != '')
- {
- $sql = "SELECT attr_value FROM " . $GLOBALS['ecs']->table('goods_attr') . " WHERE goods_attr_id " .
- db_create_in($row['goods_attr']); //goods_attr是购物车商品的属性,所以只要能控制注入代码进入购物车商品就ok了,这是二次注入的原因
- $attr_list = $GLOBALS['db']->getCol($sql);
- foreach ($attr_list AS $attr)
- {
- $row['goods_name'] .= ' [' . $attr . '] '; //union select方式可以将数据库内容查询出来显示到页面上
- }
- }
复制代码 2. /wholesale.php 160行起(将商品提交到购物车,实际上是提交到了$_SESSION)
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- /*------------------------------------------------------ */
- //-- 加入购物车
- /*------------------------------------------------------ */
- elseif ($_REQUEST['act'] == 'add_to_cart')
- {
- /* 取得参数 */
- $act_id = intval($_POST['act_id']);
- $goods_number = $_POST['goods_number'][$act_id];
- $attr_id = isset($_POST['attr_id']) ? $_POST['attr_id'] : array();
- if(isset($attr_id[$act_id]))
- {
- $goods_attr = $attr_id[$act_id]; //可控,可以参考我在截图里构造的提交数据
- }
- …
复制代码 3./wholesale.php 380行起(act==’submit_order’), 将$_SESSION里的数据写入订单
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- /* 插入订单商品 */
- foreach ($_SESSION['wholesale_goods'] as $goods)
- { //如果存在货品
- $product_id = 0;
- if (!empty($goods['goods_attr_id']))
- {
- $goods_attr_id = array();
- foreach ($goods['goods_attr_id'] as $value)
- {
- $goods_attr_id[$value['attr_id']] = $value['attr_val_id'];
- }
- ksort($goods_attr_id);
- $goods_attr = implode('|', $goods_attr_id);
- $sql = "SELECT product_id FROM " . $ecs->table('products') . " WHERE goods_attr = '$goods_attr' AND goods_id = '" . $goods['goods_id'] . "'";
- $product_id = $db->getOne($sql);
- }
- $sql = "INSERT INTO " . $ecs->table('order_goods') . "( " .
- "order_id, goods_id, goods_name, goods_sn, product_id, goods_number, market_price, ".
- "goods_price, goods_attr, is_real, extension_code, parent_id, is_gift) ".
- " SELECT '$new_order_id', goods_id, goods_name, goods_sn, '$product_id','$goods[goods_number]', market_price, ".
- "'$goods[goods_price]', '$goods[goods_attr]', is_real, extension_code, 0, 0 ".
- " FROM " .$ecs->table('goods') .
- " WHERE goods_id = '$goods[goods_id]'";
- $db->query($sql);
复制代码 4.到3为止,已经可以将注入代码写到订单商品表(order_goods)里了,接下来就是进入购物车数据表,在用户中心查看订单时有个”放回购物车”操作,可以将订单商品放到购物车数据表(cart)里,
然后在查看购物车页面/flow.php即能看到注入结果了(见1的代码分析)
/includes/lib_transaction.php return_to_cart方法 854行起
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- ...
- // 要返回购物车的商品 //约923行
- $return_goods = array(
- 'goods_id' => $row['goods_id'],
- 'goods_sn' => addslashes($goods['goods_sn']),
- 'goods_name' => addslashes($goods['goods_name']),
- 'market_price' => $goods['market_price'],
- 'goods_price' => $goods['goods_price'],
- 'goods_number' => $row['goods_number'],
- 'goods_attr' => empty($row['goods_attr']) ? '' : addslashes($row['goods_attr']), //看过来,重点在这,$row是订单商品,虽然addslashes了,但这是二次注入,最终会从数据库里再出来进入查询(见1的代码分析)
- 'goods_attr_id' => empty($row['goods_attr_id']) ? '' : $row['goods_attr_id'],
- 'is_real' => $goods['is_real'],
- 'extension_code'=> addslashes($goods['extension_code']),
- 'parent_id' => '0',
- 'is_gift' => '0',
- 'rec_type' => CART_GENERAL_GOODS
- );
- ...
复制代码 漏洞作者:BLUE |
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