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
Casino #prng-seed-collision	justCTF 2024 Quals	77.17	files wu 2
SeedSpring #predictable-rng #srand	VirSecCon 2020	22.79	files wu 2
baby_tcache #poison-null-byte	HITCON 2018	–	files wu 2
Sir_Scope #oscilloscope	IrisCTF 2024	24.59	files wu 2
PoEI-Luna #oob-write	HITCON 2019 Quals	92.94	files wu 2
Mimic_note #off-by-one-null #unlink #ret2dlresolve	De1CTF 2019	24.28	files wu 2
quotes_list #off-by-one	FireShell 2019	24.49	files wu 2
babyheap #off-by-null	IJCTF 2020	–	files wu 2
Rnote4 #no-relro #got-overwrite #heap	RCTF 2018	–	files wu 2
Oldnote #negative-size #heap-overflow #stdout-file-leak #free-hook	PoseidonCTF 2020	–	files wu 2
note #negative-index #tcache-poisoning #malloc-hook #one-gadget	RCTF 2020	–	files wu 2
hyper_normal #modular-linear-scheme #per-column-bruteforce	Crypto 2021	36.00	files wu 2
babym1ps #mips #stack-buffer-overflow #stack-canary #angr	3kCTF 2020	24.14	files wu 2
Least_Significant_Color #lsb-steganography	BlueHens 2023	24.61	files wu 2
Secret_Sequence #low-entropy-key #bruteforce	TSG 2023	–	files wu 2
input_checker #loop-counter-overwrite	IJCTF 2020	–	files wu 2
KrazyNote #linux-kernel-exploitation	Balsn 2019	25.00	files wu 2
100_Degrees #lagrange-interpolation	UMassCTF 2024	43.10	files wu 2
TheReturnOfTheSideEffect #jit-exploit	FireShell 2020	24.49	files wu 2
heap_hell #integer-underflow	Hack.lu 2018	72.75	files wu 2
Numbers #integer-signedness	FwordCTF 2020	24.42	files wu 2
faststorage #integer-overflow	Dragon 2018 Quals	25.00	files wu 2
Silk_road_I #input-constraint-cracking #brute-force	ASIS 2019 Quals	61.07	files wu 2
Stop_the_voices #image-averaging #noise-reduction	UMassCTF 2024	43.10	files wu 2
babyheap #house-of-storm #setcontext #unsorted-bin-attack	RCTF 2019	–	files wu 2
ManyNotes #house-of-orange #thread-arena #tcache-poisoning #one-gadget	RCTF 2019	–	files wu 2
Suffarring #heap-overflow #tcache	PlaidCTF 2019	95.72	files wu 2
how-to-heap #heap #tcache-dup #malloc-hook-overwrite #safe-linking #libc-2.32	CyberSecurityRumble 2020	28.00	files wu 2
TiKToK #heap #off-by-one-null #chunk-overlap #unsorted-bin-leak	DawgCTF 2020	23.29	files wu 2
nullptr #heap #mmap-threshold-overwrite #fsop #malloc-hook-overwrite	ALLES 2020	–	files wu 2
farm #gf-2^6 #small-keyspace-bruteforce	Crypto 2021	36.00	files wu 2
FormatS #format-string #stack-memory-disclosure	CyberYoddha 2020	19.71	files wu 2
warmup #format-string #snprintf	Defenit 2020	23.88	files wu 2
smash #format-string #ret2libc	TokyoWesterns 2020	–	files wu 2
Reactor_GOT #format-string #got-overwrite #one-gadget	Shakti 2020	25.00	files wu 2
Simple #format-string #got-overwrite #one-gadget	Securinets 2019 Quals	22.72	files wu 2
blindshot #format-string #blind	TokyoWesterns 2020	–	files wu 2
babyformat #format-string	TetCTF 2021	25.00	files wu 2
OnePieceRemake #format-string	FwordCTF 2020	24.42	files wu 2
blacky_echo #format-string	m0leCon 2020 Quals	24.55	files wu 2