$ ctf42

Misc CTF challenges

3,995 Misc CTF challenges from 420 CTFs (2011–2026), 705 with writeups.

Top misc techniques

#stack-buffer-overflow 44 #format-string 41 #ret2libc 29 #rop 29 #use-after-free 26 #tcache-poisoning 24 #got-overwrite 21 #one-gadget 19 #shellcode 19 #stack-overflow 17 #ret2win 17 #heap-overflow 14 #tcache 13 #buffer-overflow 12 #double-free 11

Challenges

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Challenge CTF Weight Has
Byte
#format-string
 HSCTF 2019 – files wu 2
stolen_backdoor
#flush-reload#cache-side-channel#shared-library-cow
 Pwn2Win 2020 63.56 files wu 2
babyfs
#file-vtable-hijack
 HITCON 2017 Quals 69.38 files wu 2
Beginner_menace
#exif-metadata
 BackdoorCTF 2023 – files wu 2
chat
#double-free#tcache-poisoning#got-overwrite
 RCTF 2019 – files wu 2
pppd
#cve-2020-8597#pppd#eap#stack-overflow
 De1CTF 2020 24.28 files wu 2
BuggyPWN
#custom-vm-reversing#2d-memory-oob#stack-overflow#printable-shellcode
 CTFZone 2018 Quals 23.92 files wu 2
simulator
#custom-vm#mips-assembly#arbitrary-read-write
 RCTF 2018 – files wu 2
simple_vm
#custom-vm#bytecode-reversing
 RCTF 2018 – files wu 2
Rima
#custom-encoding-reversal#base5
 Crypto 2021 36.00 files wu 2
stl_container
#c++-stl#heap-exploitation#tcache#libc-2.27
 De1CTF 2020 24.28 files wu 2
Metacortex
#buffer-overflow#variable-overwrite#alloca
 b01lers 2020 22.46 files wu 2
protrude
#buffer-overflow#type-confusion#canary-bypass#info-leak
 zer0pts 2020 24.56 files wu 2
bflol
#brainfuck-interpreter#oob-tape#memory-corruption
 CyberSecurityRumble 2020 28.00 files wu 2
In_Plain_Sight
#binwalk-embedded-file#strings#encrypted-zip
 1337UP 2024 – files wu 2
genius
#binary-patching
 BSidesSF 2019 25.00 files wu 2
warmup
#arm-ret2shellcode
 InCTF 2018 25.00 files wu 2
trick_or_treat
#arbitrary-write
 HITCON 2019 Quals 92.94 files wu 2
tiny_ecc
#anomalous-curve#smart-attack#smooth-order#pohlig-hellman
 Crypto 2021 36.00 files wu 2
android_ololo_country_checker
#android-reversing#native-library#arm#jni
 CTFZone 2018 Quals 23.92 files wu 2
Wolf
#aes-gcm#short-nonce-bruteforce
 Crypto 2021 36.00 files wu 2
keybase
#aes-cbc#partial-key-bruteforce#iv-recovery
 Crypto 2021 36.00 files wu 2
Save_the_Kappa FullWeakEngineer 2025 24.60 files wu 2
floordrop DiceCTF 2024 Quals 54.40 files wu 2
remis_world LA 2024 – files wu 2
tldr_please_summarise DownUnderCTF 2024 68.04 files wu 2
Tokyo_Payload SECCON 2023 Quals 100.00 files wu 2
cache_v1 TetCTF 2021 25.00 files wu 2
Actual_ASLR_2 ALLES 2020 – files wu 2
OnePiece FwordCTF 2020 24.42 files wu 2
b64decoder TAMUctf 2020 – files wu 2
captain_hook SharkyCTF 2020 24.29 files wu 2
cookie_library TJCTF 2020 – files wu 2
got_it HSCTF 2020 – files wu 2
jailbreak SuSeC 2020 24.15 files wu 2
jumpdrive b01lers 2020 22.46 files wu 2
rrop DarkCTF 2020 23.71 files wu 2
treecache_2 HSCTF 2020 – files wu 2
tukro Pwn2Win 2020 63.56 files wu 2
Asterisk-Alloc TokyoWesterns 2019 – files wu 2