capture the flag – Page 2 – Bootlesshacker's Cybersecurity Blog

Welcome to Insanity – my fifth CTF. There is one flag on this CTF. Your objective is to gain root access.

This CTF is rated as 5/5 for difficulty. What makes this CTF difficult is not necessarily the types of vulnerabilities you will find – instead, it’s the process of exploiting them. DHCP is enabled – this CTF has been tested on VirtualBox only, though I don’t think there’ll be issues if you run it with VMWare.

Synopsis

A web hosting provider has asked you to test their security. Can you find the vulnerabilities on their server and gain root access? If anyone wants to submit a written report for this, I’d give it a read and potentially publish it on this blog! 🙂

Note about hints

Please note, I will not be giving out hints for this CTF until at least the 30th August 2020. Try harder.

Edit: A few people have joined my Discord Server to share information (which is absolutely fine). Feel free to join and discuss ways to hack this CTF.

Download now

You can download Insanity here.

SHA-256: 75819bda88013d13465c9ec4145d56470378450e8c6c0c6faa8c72503a049850

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GreenOptic CTF

GreenOptic is my fourth Capture the Flag box. It is rated as ‘Very Hard’ (as per the difficulty matrix). As with all of my CTFs, please run this in ‘Host Only’ mode – it does not need an internet connection.

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Don’t let the difficulty put you off though – the CTF is designed to be realistic, so you won’t come across anything you wouldn’t experience in a real environment.

You will need to enumerate this box very well, and likely chain together different bits of information and vulnerabilities in order to gain access.

Synopsis:

British Internet Service Provider GreenOptic has been subject to a large scale Cyber Attack. Over 5 million of their customer records have been stolen, along with credit card information and bank details.

GreenOptic have created an incident response team to analyse the attack and close any security holes. Can you break into their server before they fix their security holes?

You can download GreenOptic here.

SHA-256: 00af6eb4a29fa6447fb68ea4dae112de822c78d2021e210d8233e0b0ba8cc5e9

Once you’ve completed my CTF, let me know how you found it.

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