$ ctf42

Challenges

Category
Difficulty
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Higher weight ≈ harder, more prestigious event.
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2168 challenges · browse all techniques

Challenge CTF Weight Category Has
Mahashamshan
#ip-fragment-offset-stego
 Kashi 2026 21.78 Forensics files wu 1
HotPause
#reverse-image-search
 BITSCTF 2025 – OSINT files wu 1
Minesweeper_2
#linear-system-solving
 BITSCTF 2025 – Crypto files wu 1
Noob_RSA_Returns
#rsa#fermat-little-theorem
 BITSCTF 2025 – Crypto files wu 1
RSA_Bummer
#wilsons-theorem#rabin-cryptosystem
 BITSCTF 2025 – Crypto files wu 1
SimpleNote
#use-after-free (uaf)#tcache-poisoning#fastbin-fd-overwrite
 BlitzCTF 2025 23.20 Pwn files wu 1
Clockwork
#xor
 EnigmaXplore 2025 – Reverse files wu 1
MMDLX
#multi-layer-base64
 Kashi 2025 21.78 Crypto files wu 1
Random_Inator
#predictable-prng-key
 Kashi 2025 21.78 Crypto files wu 1
cratecrack
#heap-uaf#ecdsa-nonce-bias
 bi0sCTF 2025 95.79 Pwn files wu 1
dont_whisper
#adversarial-audio
 bi0sCTF 2025 95.79 Misc files wu 1
baby_rev
#ghidra-static-analysis
 BITSCTF 2024 – Reverse files wu 2
Cursed_Credential
#firefox-credential-decryption#master-password-cracking#hashcat
 BackdoorCTF 2024 – Forensics files wu 1
Decompressor
#huffman-coding#compression-reconstruction
 BackdoorCTF 2024 – Misc files wu 1
I_Like_McDonalds
#hash-length-extension-attack#mac-forgery
 BackdoorCTF 2024 – Crypto files wu 1
Hopper
#dispatcher-gadget
 IRON 2024 – Pwn files wu 1
Secret_Notes
#cookie-tossing
 IRON 2024 – Web files wu 1
Image_gallery_1
#xss#bfcache
 bi0sCTF 2024 79.83 Web files wu 2
Image_gallery_2
#dom-clobbering#cache-probing
 bi0sCTF 2024 79.83 Web files wu 1
Variety_Notes
#redos#csp-bypass
 bi0sCTF 2024 79.83 Web files wu 1
kowaiiVm
#jit-toctou#rop
 bi0sCTF 2024 79.83 Pwn files wu 1
palindromatic
#cross-cache-uaf#dirtypipe
 bi0sCTF 2024 79.83 Pwn files wu 1
virtio_note
#qemu-oob#rop
 bi0sCTF 2024 79.83 Pwn files wu 2
Beginner_menace
#exif-metadata
 BackdoorCTF 2023 – Misc files wu 2
Curvy_Curves
#elliptic-curve-over-ring#rsa-factoring
 BackdoorCTF 2023 – Crypto files wu 1
Knapsack
#knapsack#meet-in-the-middle (mitm)
 BackdoorCTF 2023 – Crypto files wu 2
PRSA
#polynomial-ring-rsa#gf(2)-polynomial-factorization
 BackdoorCTF 2023 – Crypto files wu 1
Something_in_Common
#rsa#hastad-broadcast-attack#non-coprime-moduli#crt
 BackdoorCTF 2023 – Misc files wu 2
Sonic_Hide_and_Seek
#audio-steganography#spectrogram#sstv
 BackdoorCTF 2023 – Forensics files wu 1
php_sucks
#php-file-upload-bypass#strtok-filename-truncation#rce
 BackdoorCTF 2023 – Web files wu 1
Easy_Peasy
#stack-buffer-overflow#ret2win
 DeconstruCT.F 2023 11.23 Pwn files wu 1
Magicplay
#png-repair#file-signature-fix#forensics
 DeconstruCT.F 2023 11.23 Forensics files wu 1
whatThe
#dtmf-decoding#fft#audio-analysis
 DeconstruCT.F 2023 11.23 Reverse files wu 1
CrossingTheRedSea
#brainfuck#esolang#substitution-cipher
 VishwaCTF 2023 22.69 Crypto files wu 2
EmailIncoming
#file-signature#archive-cracking#steganography
 VishwaCTF 2023 22.69 Crypto files wu 1
EtherealCrackme
#windows-reversing#anti-analysis
 VishwaCTF 2023 22.69 Reverse files wu 1
MechanicalEngineering
#gcode#binary-encoding
 VishwaCTF 2023 22.69 Reverse files wu 1
ReversingIsEzeeee
#pyinstaller#pyc-decompile
 VishwaCTF 2023 22.69 Reverse files wu 1
TheSecretImage
#visual-cryptography#image-subtraction
 VishwaCTF 2023 22.69 Crypto files wu 1
WednesdayThursdayFriday
#z3#constraint-solving
 VishwaCTF 2023 22.69 Reverse files wu 1