Misc CTF challenges

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

Top misc techniques

Challenges

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Challenge	CTF	Weight	Has
video_player #use-after-free (uaf)#fastbin-attack #vtable-hijack #malloc-hook	SECCON 2017 Quals	30.00	files wu 2
EncryptionService #use-after-free (uaf)#fastbin #heap-overlap	UTCTF 2019	–	files wu 2
bookworm #use-after-free (uaf)	HackPack 2020	–	files wu 2
ragnarok #use-after-free (uaf)	HITCON 2017 Quals	69.38	files wu 2
Hard_Heap #unsorted-bin-attack	HSCTF 2019	–	files wu 2
Cards #tcache-poisoning #safe-linking-bypass #environ-leak #orw-rop	PoseidonCTF 2020	–	files wu 2
three #tcache-dup #unsorted-bin #stdout-file-attack	BCTF 2018	–	files wu 2
Twine #strings-analysis	NahamCon 2024	41.61	files wu 2
lazyhouse #stack-pivot	HITCON 2019 Quals	92.94	files wu 2
SeaShells #stack-overflow #ret2shellcode	BSidesBOS 2020	25.00	files wu 2
slowfire #stack-overflow #ret2shellcode	BSidesSF 2019	25.00	files wu 2
thereisnospoon #stack-overflow #angr-solver #rop	b01lers 2020	22.46	files wu 2
twisty #stack-overflow	HackTM 2020 Quals	24.02	files wu 2
Precise_average #stack-canary-bypass #libc-leak #one-gadget #stack-pivot	ASIS 2019 Quals	61.07	files wu 2
blox2 #stack-buffer-overflow #write-primitive #text-overwrite #shellcode	CSAW 2020 Quals	59.00	files wu 2
BabyFlow #stack-buffer-overflow #variable-overwrite	1337UP 2024	–	files wu 2
nothing_more_to_say #stack-buffer-overflow #ret2win	TokyoWesterns 2019	–	files wu 2
Accounting_Accidents #stack-buffer-overflow	UIUCTF 2020	–	files wu 2
ripe_reader #stack-buffer-overflow	NahamCon 2020	23.72	files wu 2
NameTag #srop #stack-pivot #canary-bypass	BSidesBOS 2020	25.00	files wu 2
built_in_http #sqlite-fts3-tokenizer	IJCTF 2020	–	files wu 2
Spectre #spectre #speculative-execution #cache-timing-side-channel	PlaidCTF 2019	95.72	files wu 2
Blockchain_Play_for_Free #solana #solang #storage-read	SekaiCTF 2023	24.86	files wu 2
shifts_ahoy #shellcode-injection	NahamCon 2020	23.72	files wu 2
runitplusplus #shellcode-injection	BSidesSF 2019	25.00	files wu 2
Shellcode_Executor_PRO #shellcode-filter-bypass	justCTF 2019	24.85	files src wu 2
BabyPwn #shellcode #pointer-overwrite	UTCTF 2019	–	files wu 2
ABJudge #shellcode #32bit-syscall-bypass #seccomp-bypass	De1CTF 2019	24.28	files wu 2
secret-pwnhub-academy-rewards-club-2 #shellcode	Hack.lu 2020	87.94	files wu 2
memsafety #rust-double-free	N1CTF 2018	24.41	files wu 2
BabyRust #rust #cve-2019-12083 #arbitrary-read-write #tcache-double-free #one-gadget	De1CTF 2019	24.28	files wu 2
Triplet #rsa #shared-exponent-multiple-moduli #phi-multiple	Crypto 2021	36.00	files wu 2
Something_in_Common #rsa #hastad-broadcast-attack #non-coprime-moduli #crt	BackdoorCTF 2023	–	files wu 2
seeforyourself #rop #ret2system	b01lers 2020	22.46	files wu 2
Jimi_Jamming #rop #execve-syscall	Block 2020	35.14	files wu 2
Paf #reversing #unicorn-emulation	SPbCTF 2021 Quals	–	files wu 2
boredom #ret2win	HSCTF 2020	–	files wu 2
WelcomePwner #ret2libc	FwordCTF 2020	24.42	files wu 2
Censorship #pyjail-escape	AmateursCTF 2023	24.54	files wu 2
b4by_jail #pyjail #unicode-normalization	Pearl 2024	23.95	files wu 2