$ ctf42

#hash-length-extension CTF challenges

6 CTF challenges using hash-length-extension from 6 CTFs (2021–2024), 6 with writeups. Mostly Crypto (83%) and Web (17%).

Crypto · 5 Web · 1

Often combined with

#sha1 2 #exiftool-rce 1 #md5 1

Challenges

Filter and sort these in the challenge browser →

Challenge CTF Weight Category Has
fancynotes
#hash-length-extension
 m0leCon 2022 Quals 36.00 Crypto files wu 2
TagSeries3
#hash-length-extension#sha1
 WolvCTF 2024 35.25 Crypto files wu 1
Merkle-Derkle
#hash-length-extension#sha1
 PatriotCTF 2022 24.52 Crypto files wu 1
JAM
#hash-length-extension#md5
 TFC 2021 – Crypto files wu 1
Intellimage
#hash-length-extension#exiftool-rce
 BSidesTLV 2021 23.94 Web files wu 1
ForgeMe_2
#hash-length-extension
 NahamCon 2023 34.82 Crypto files wu 1