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August 29, 2017

Communicating within 0.0.0.0/8

Recently, someone came to me with the problem that some remote IOT-devices received a broken configuration where the first octet of their IP-address was changed to 0 (i.e. from 192.168.0.4 to 0.168.0.4). Because of the location of these devices it...

networking

July 17, 2017

Google CTF 2017: ASCII Art Client (reversing)

This challenge came with two files: a binary without an extension and a pcap file. The binary was probably going to be a Linux-executable, and indeed:

ctf

July 14, 2017

Google CTF 2017: Moon (reversing)

This challenge taught me a lot about a few different things. The challenge files consist of an executable and some SDL libraries. Running the executable shows us this:

ctf

July 9, 2017

Google CTF 2017: JohnnyBoy (reversing)

The description for the challenge is as follows:

ctf

June 29, 2017

Address Space Layout Randomisation on Windows

security windows

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