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Securinets-CTF-2019, Matrix of Hell
Matrix of Hell, 992 pt Welcome, fellow code adventurers, to the treacherous Matrix of Hell challenge! Brace yourselves as we navigate through the twisted paths of this binary labyrinth and unlock its secrets. Prepare for a journey filled with humor and code-cracking prowess! As we confront the mighty binary, it...
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AES-CBC bit flipping Attack
n00b19CTF(Easy-Flipp, 100 pt) Welcome to this simple crypto challenge created by me. During the CTF, no one managed to solve this challenge, so I decided to provide a writeup for beginners to understand how CBC bit flipping works. AES-CBC Encryption and Decryption Flowchart: The main vulnerability of CBC is that...
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Simple Shellcode Injection
TUCTF18(Shelleasy, 345 pt) In this challange we have to overwrite variable to 0xdeadbeef and after that inject 32 bit shellcode to stack thats it. STEP-1 Binary protection and file type : dr3dd@dr3dd-Aspire-F5-573G ~/ctf-2018/TUctf18/shelleasy file shella-easy shella-easy: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked, interpreter...