KIOPTRIX- 2014 (#5)
- Layout for this exercise:
1 - INTRODUCTION
- The goal of this exercise is the study of the hacking process for the vulnerable machine Kioptrix 2014 (#5)
- Kioptrix 2014 (#5) can be downloaded from here:
https://www.vulnhub.com/entry/kioptrix-2014-5,62/
- Once downloaded, extracted and opened with WMware:
2 - ENUMERATION
- First, using netdiscover let's notice that the only IP address in the local network working with WMware is 192.168.1.159, so it should correspond to the vulnerable machine Kioptrix:
- Scanning with Nmap, there are only two open ports (80 and 8080), running Apache web server.
- Also, it is interesting that the operating system is FreeBSD 7.0|8.0|9.0
- Using dirb to check the contents of the website:
- Trying to connect to the web server to port 8080, there is a Forbidden message as answer:
- Trying to connect to the web server to port 8080, It works !
- Viewing the Page Source, we detect the presence of pChart2.1.3:
- pChart is a PHP library that helps to create anti-aliased charts or pictures directly from the web server.
http://www.pchart.net/
- Going deeper into folder pChart2.1.3:
- For instance, connecting to folder /examples:
3 - EXPLOITATION
- First, let's see if there is any pChart 2.1.3 related vulnerability:
- It seems that there are a numbers of vulnerabilities affecting the /examples folder:
- Let's focus our attention on the Directory Traversal attack:
- Crafting the Directory Traversal URL to our needs:
- The attack is successful:
- At this point let's remember (from Namp) that we are dealing with FreeBSD 7.0|8.0|9.0 operating system and Apache 2.2.21 web server.
- The configuration file for this type of operating system and web server can be found at /usr/local/etc/apache22/httpd.conf:
https://www.freebsd.org/doc/handbook/network-apache.html
- Now, let's craft the URL to see what we can learn from httpd.conf:
- The Directory Traversal attack is again successful:
- Let's notice the last part of the output, where it seems that for successfully connecting to the port 8080 the User-Agent must be mandatory Mozilla/4.0
- Connecting to 192.168.1.159:8080 with curl and specifying "User-Agent:Mozilla/4.0" the element phptax appears:
- phptax is an old web application to calculate US income return.
- Now, we must change the default Mozilla version to the needed 4.0. For that purpose, opening about:config and accepting the risk:
- Searching for useragent and opening a new String:
- Writing a new string and its value:
- Now, the connection to 192.168.1.159:8080 is successful and phptax is indexed:
- Metasploit helps to exploit phptax:
- Setting options:
- Running the exploit a limited shell is achieved for user www:
4 - PRIVILEGE ESCALATION
- Getting an sh shell:
- Remembering that the operating system is FreeBSD 9.0:
- Googling for FreeBSD 9.0 vulnerabilities:
- There is an interesting one for Privilege Escalation:
- Downloading the exploit and copying to a working directory:
- Setting a netcat listening session with the purpose of transferring the exploit to the victim machine:
- Doing the same thing at the victim's side (/tmp is writeable) the transfer is finally successful:
- Listing the exploit:
- Compiling:
- Running the exploit a root shell is achieved:
5 - CAPTURING THE FLAG
- Going to the /root folder:
etc ...
