$ 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
Florida_Forecaster
#stack-buffer-overflow#rop#info-leak
 SunshineCTF 2020 23.34 files wu 1
AdventureChain
#stack-buffer-overflow#rop
 Shakti 2020 25.00 files wu 1
Secret_Society
#stack-buffer-overflow#null-terminator-overwrite#adjacent-buffer-leak
 csictf 2020 23.67 files wu 1
mginx
#stack-buffer-overflow#mips64#shellcode
 RCTF 2020 – files wu 1
Feed_me
#stack-buffer-overflow#atoi#linear-equations
 Pragyan 2019 20.69 files wu 1
O-xo-xo
#stack-buffer-overflow
 SPbCTF 2020 Quals – files wu 1
baffling_buffer_0
#stack-buffer-overflow
 MetaCTF 2020 – files wu 1
RequestBin
#ssti#go-templates
 WeCTF 2022 36.12 files wu 1
msfrogofwar3
#ssti
 corCTF 2024 55.00 files wu 1
File.io
#ssrf#token-leak
 WeCTF 2022 36.12 files wu 1
SSH
#ssh-mitm#credential-theft
 SekaiCTF 2023 24.86 files wu 1
syscall_interface
#srop#sigreturn#personality#shellcode
 RCTF 2019 – files wu 1
SecureROP
#srop#sigreturn
 Rooters 2019 24.23 files wu 1
SecPwn
#srop#rop#shellcode
 Balsn 2019 25.00 files wu 1
Happy_New_Year_Part1
#sqlite-injection
 kksctf 2020 – files wu 1
ateles
#spidermonkey-jit
 InCTF 2019 37.00 files wu 1
TPM20
#snprintf-overflow#rop#tpm2
 Pwn2Win 2018 29.31 files wu 1
Pls_respond
#sms-ems-decoding
 LakeCTF 2025 Quals – files wu 1
Mafia_at_the_end_2
#smart-contract#predictable-rng#storage-read
 PwnMe 2025 Quals 24.95 files wu 1
frozen
#signature-forgery#masked-key-recovery#modular-inverse
 Crypto 2021 36.00 files wu 1
ZIP_Extractor_3000
#signature-bypass#zip
 TeamItaly 2023 24.88 files wu 1
babyshellcode
#shellcode-side-channel
 ISITDTU 2019 Quals 23.38 files wu 1
ComputeShell
#shellcode#stack-buffer-overflow
 Shakti 2020 25.00 files wu 1
beginners_pwn
#shellcode#srop
 TSG 2020 – files wu 1
coolcode
#shellcode#restricted-charset
 SCTF 2020 – files wu 1
Shorty_level35
#shellcode
 FE-CTF 2023 – files wu 1
Melek
#shamir-secret-sharing#lagrange-interpolation#non-coprime-exponent#modular-square-root
 Crypto 2024 65.62 files wu 1
hxp_silicon_foundaries_hack2
#sev-register-injection
 hxp 2024 – files wu 1
Beaconing_from_above
#sdr#signal-analysis#morse
 Starpwn 2026 – files wu 1
real-ruby-escaping
#ruby-sandbox-escape
 HITCON 2017 Quals 69.38 files wu 1
DoRSA
#rsa#wiener-attack#continued-fractions
 Crypto 2021 36.00 files wu 1
Insights
#rsa#predictable-private-exponent
 Crypto 2023 59.60 files wu 1
hamul
#rsa#factoring-concatenated-primes
 Crypto 2021 36.00 files wu 1
RSAphantine
#rsa#diophantine-equations#sum-of-cubes-factoring
 Crypto 2021 36.00 files wu 1
knife
#rop-syscall-chain
 m0leCon 2020 Quals 24.55 files wu 1
babybof
#rop#stack-pivot#ret2libc
 zer0pts 2020 24.56 files wu 1
Titusville
#rop#ret2syscall#ropchain
 SunshineCTF 2024 38.57 files wu 1
riskv_business
#riscv
 HackPack 2020 – files wu 1
OSINT_Exam
#reverse-image-search
 FortID 2025 30.00 files wu 1
EzRet2Win
#ret2win
 FwordCTF 2020 24.42 files wu 1