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
gambling-problem-2 #integer-overflow	COMPFEST 2020	–	files wu 1
OOMG_SPACE #info-leak #memory-disclosure	SunshineCTF 2020	23.34	files wu 1
Eye_doctor #image-deblurring #deconvolution	BraekerCTF 2024	24.72	files wu 1
Magic_The_Ungathering #image-analysis	UMassCTF 2024	43.10	files wu 1
Sniff_one #i2c-decoding #logic-analyzer	CrewCTF 2024	26.89	files wu 1
Decompressor #huffman-coding #compression-reconstruction	BackdoorCTF 2024	–	files wu 1
traffic #http-object-extraction	ISITDTU 2023 Quals	37.00	files wu 1
pheappo #house-of-husk	m0leCon 2020 Finals	24.55	files wu 1
CloneWarS #house-of-force	KipodAfterFree 2019	24.61	files wu 1
dead_note_lv3 #house-of-force	ISITDTU 2018 Quals	23.38	files wu 1
feedback #house-of-einherjar	InCTF 2018	25.00	files wu 1
Honey #hidden-number-problem #lattice-reduction #lll (lll-lattice-reduction)	Crypto 2024	65.62	files wu 1
Screenshot #hexdump-reconstruction	NahamCon 2025	53.77	files wu 1
Barak #hessian-curve #ecdlp #pohlig-hellman	Crypto 2023	59.60	files wu 1
roshambo #heap-overflow #tcache	WMCTF 2020	–	files wu 1
notes #heap-overflow #calloc-mmap-bit-leak #libc-leak #free-hook-overwrite #glibc-2.31	CSCML 2020	–	files wu 1
baby_mac #heap-overflow #arbitrary-write #hook-overwrite	WMCTF 2020	–	files wu 1
securenote #heap-overflow #aes-ctr-keystream-recovery #overlapping-chunks	Balsn 2019	25.00	files wu 1
netatalk #heap-overflow	HITCON 2019 Quals	92.94	files wu 1
damocles #heap-overflow	HITCON 2017 Quals	69.38	files wu 1
Zoo #heap-exploitation #unlink #unsorted-bin-leak	Codegate 2018 Quals	25.00	files wu 1
diy #heap-exploitation #got-overwrite	Blaze 2019	24.07	files wu 1
Admin_CLI #hash-collision	FE-CTF 2023	–	files wu 1
Turing_Complete #google-apps-script	BlueHens 2023	24.61	files wu 1
cfgo-CheckIn #golang-reversing #stack-overflow #aztec-code	WMCTF 2020	–	files wu 1
Knowledge_Repository #git-forensics #git-bundle	SunshineCTF 2023	34.09	files wu 1
lazynote #fsop #file-structure	SECCON 2020 Quals	65.77	files wu 1
weather-companion #frida #ssl-pinning-bypass	BSidesSF 2019	25.00	files wu 1
Another_ret_to_libc #format-string-overflow	kksctf 2019	–	files wu 1
grimoire #format-string #info-leak #buffer-overflow #one-gadget	zer0pts 2020	24.56	files wu 1
xsh #format-string #got-overwrite #pie-leak	Rooters 2019	24.23	files wu 1
ShoppingList #format-string #got-overwrite	VirSecCon 2020	22.79	files wu 1
Unprintable #format-string #dl-fini-hijack #stack-leak	De1CTF 2019	24.28	files wu 1
The_Calculator #format-string #arbitrary-write	X-MAS 2018	–	files wu 1
The_Calculator_2.0 #format-string #arbitrary-write	X-MAS 2018	–	files wu 1
Jupiter #format-string	SunshineCTF 2024	38.57	files wu 1
coronacation #format-string	DawgCTF 2020	23.29	files wu 1
leet_haxor #format-string	NahamCon 2020	23.72	files wu 1
tftp #format-string	HITCON 2018	–	files wu 1
Cache #flask-session-forgery #debug-mode #secret-key	WeCTF 2021	25.00	files wu 1