Archive of posts with tag 'writeup'

Timed - tjctf 26 May 2020

This one is a cool blacklist bypass. It’s pretty simple. You are presented a text interface asking you to enter a python command. read more...

Tags: ctf writeup python

Taking advantage of output dumping for a Gradescope programming assignment 08 May 2020

An older story about exploiting the design of an autograder for a marginal increase in marks, that didn't matter in the slightest in the end. read more...

Tags: writeup c++ assignment

The Prophet - TetCTF 08 Jan 2020

This was a fun one. We start off with a web page and get a foothold with an arbitrary file read vulnerability, and end it off with a Python Flask Arbitrary Code Execution in the web debugger. read more...

Tags: ctf writeup python flask ACE

Where did he GO? - Inferno CTF 31 Dec 2019

This was also one of the easier ones. As you can tell, I’m not that good at these things. I also have never scripted in go before. Here’s what happened. read more...

Tags: ctf writeup go

7110 - OverTheWire Advent 2019 CTF 30 Dec 2019

This one was one of the easier ones. We are given some .txt files, .csv files, and a single .h C header file. We see that the .csv files contain keylogging data, where the first column is a timestamp and the second column is the key that was pressed. From these .csv files, we are supposed to figure out what Santa typed. read more...

Tags: ctf writeup python