日常練習做題
打開環境
是這樣的頁面 ，老規矩 掃目錄，在掃目錄的時候點一下功能
點發帖，隨便填寫內容
到了登錄頁面，要登錄才行
這個登錄框的默認內容有點東西 感覺像是直接給了 用戶和密碼 zhangwei/zhangwei***
可能要我們爆破密碼的這三個***
寫個python腳本 列出密碼的可能
password1=[]
password1.append(password+str(i))
with open ("./password.txt","w") as f:
for i in range(len(password1)):
f.write(password1[i])
f.write("\n")
字典准備就緒 抓包使用bp 暴力破解吧
密碼為 zhangwei666
成功登錄然后發帖
然后沒啥用 繼續點嘛 提示我們是 sql
那就找可能有 sql的地方吧
無果
看下我們掃的目錄
有個 .git 大部分出現這個 .git 那就是 源碼泄露了
用GitHack 下載源碼
得到一個 write_do.php 的文件
打開看看
額 這啥也看不出來啊
卡住了。。
去看了wp 發現 嗯 這題目我下載的 是不完整的 ，我去找了一下原題
找到一個完整的 write_do.php
<?php
include "mysql.php";
session_start();
if($_SESSION['login'] != 'yes'){
header("Location: ./login.php");
die();
}
if(isset($_GET['do'])){
switch ($_GET['do'])
{
case 'write':
$category = addslashes($_POST['category']);
$title = addslashes($_POST['title']);
$content = addslashes($_POST['content']);
$sql = "insert into board
set category = '$category',
title = '$title',
content = '$content'";
$result = mysql_query($sql);
header("Location: ./index.php");
break;
case 'comment':
$bo_id = addslashes($_POST['bo_id']);
$sql = "select category from board where id='$bo_id'";
$result = mysql_query($sql);
$num = mysql_num_rows($result);
if($num>0){
$category = mysql_fetch_array($result)['category'];
$content = addslashes($_POST['content']);
$sql = "insert into comment
set category = '$category',
content = '$content',
bo_id = '$bo_id'";
$result = mysql_query($sql);
}
header("Location: ./comment.php?id=$bo_id");
break;
default:
header("Location: ./index.php");
}
}
else{
header("Location: ./index.php");
}
?>
代碼審計 （我自己差的一批）
comment模塊中的$category 是直接從board中取出數據，沒有過濾就直接放入sql語句中了
其中$category和$content都可控
創建一個這樣的留言
但是不管我怎么提交 都不會顯示出來
看wp 知道 了 這個sql語句是多行寫的，所以要多行注釋 /**/ 連接起來
所以創建下面這個
在下面這個地方提交 */-- + 的留言 封閉sql語句
直接輸出 /etc/passwd
得到 www用戶的家目錄
有了www的家目錄 那我們就可以 得到家目錄下的.bash_history目錄了 (.bash_history 存的是 用戶的歷史命令操作)
同樣的操作讀取文件
得到 www 的歷史命令
cd /tmp/ （切換到tmp下）
unzip html.zip （解壓 html.zip文件）
rm -f html.zip （刪除 html.zip壓縮包）
cp -r html /var/www/ （復制html下的全部到 /var/www/ 下）
cd /var/www/html/ (切換到/var/www/html/下)
rm -f .DS_Store （刪除 .DS_Srore）
service apache2 start (啟動apache服務)
這個被刪除的 .DS_Store文件有點可以，但是沒用刪除 tmp下的那個 .DS_Store文件
我們讀取這個文件
同樣的方法
沒出來？？？？
可能是 文件太大了吧
那我們加密一下 用16進制編碼一下
然后呢 我就得得到了一串
00000001427564310000100000000800000010000000040A000000000000000000000000000000000000000000000800000008000000000000000000000000000000000000000002000000000000000B000000010000100000730074007200610070496C00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000B000000090062006F006F007400730074007200610070496C6F63626C6F62000000100000004600000028FFFFFFFFFFFF00000000000B0063006F006D006D0065006E0074002E007000680070496C6F63626C6F6200000010000000CC0000002800000001FFFF000000000003006300730073496C6F63626C6F62000000100000015200000028FFFFFFFFFFFF0000000000190066006C00610067005F0038003900340036006500310066006600310065006500330065003400300066002E007000680070496C6F63626C6F6200000010000001D800000028FFFFFFFFFFFF0000000000050066006F006E00740073496C6F63626C6F62000000100000004600000098FFFFFFFFFFFF0000000000090069006E006400650078002E007000680070496C6F63626C6F6200000010000000CC0000009800000002FFFF000000000002006A0073496C6F63626C6F62000000100000015200000098FFFFFFFFFFFF000000000009006C006F00670069006E002E007000680070496C6F63626C6F6200000010000001D800000098FFFFFFFFFFFF000000000009006D007900730071006C002E007000680070496C6F63626C6F62000000100000004600000108FFFFFFFFFFFF00000000000600760065006E0064006F0072496C6F63626C6F6200000010000000CC00000108FFFFFFFFFFFF00000000000C00770072006900740065005F0064006F002E007000680070496C6F63626C6F62000000100000015200000108FFFFFFFFFFFF0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001000000000000080B00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000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這玩意
這玩意我解不出來。。。
看wp吧
說的里面有個 flag_8946e1ff1ee3e40f.php
文件
那我就讀取這個文件吧
得到
3C3F7068700A0924666C61673D22666C61677B30646431346161653831643934393034623334393231313765326133643464667D223B0A3F3E0A
解碼
得到flag