CTF challenges & writeups

393 challenges · browse all techniques

Challenge	CTF	Weight	Category	Has
portable_graphics #go-binary-reversing #png-chunk-crafting #custom-chunk	CTF@AC 2025 Quals	24.53	Reverse	files wu 1
CCCCC #encoding #nibble-swap	TFC 2024	–	Crypto	files wu 1
HE_DID_WHAT #log-analysis #powershell	TFC 2024	–	Forensics	files wu 1
PADGROUNDS #padding-oracle #aes-cbc	TFC 2024	–	Crypto	files wu 1
4aes #aes #meet-in-the-middle (mitm)#bruteforce	Defcamp 2023 Quals	–	Crypto	files wu 1
baby_bof #stack-buffer-overflow #gets #ret2win	Defcamp 2023 Quals	–	Pwn	files wu 1
bistro #stack-buffer-overflow #gets #rop	Defcamp 2023 Quals	–	Pwn	files wu 1
bistro_v2 #stack-buffer-overflow #gets #rop	Defcamp 2023 Quals	–	Pwn	files wu 1
book #oob-index #arbitrary-read-write #got-overwrite #ret2libc	Defcamp 2023 Quals	–	Pwn	files wu 1
system_leak #format-string #arbitrary-read #libc-leak	Defcamp 2023 Quals	–	Pwn	files wu 1
system_write #format-string #buffer-overflow #got-overwrite	Defcamp 2023 Quals	–	Pwn	files wu 1
BABY_DUCKY_NOTES_REVENGE #xss	TFC 2023	–	Web	files wu 1
blindsight #blind-rop #brop #stack-buffer-overflow	Defcamp 2022	–	Pwn	files wu 2
cache #heap #use-after-free (uaf)#tcache #heap-leak	Defcamp 2022	–	Pwn	files wu 3
cup-of-tea #tea-cipher #reversing #ida	Defcamp 2022	–	Reverse	files wu 2
malwy #malware-analysis #reversing #ida	Defcamp 2022	–	Reverse	files wu 1
ONE #reversing #subleq #oisc	TFC 2022	–	Reverse	files wu 1
KrampusGifts #race-condition #tcache #heap-exploitation #multithreading	X-MAS 2022	–	Pwn	files wu 1
santascomplainthotline #rop #stack-buffer #ret2libc	X-MAS 2022	–	Pwn	files wu 1
JAM #hash-length-extension #md5	TFC 2021	–	Crypto	files wu 1
SANTA #ret2win #stack-buffer-overflow	TFC 2021	–	Pwn	files wu 1
SEA_LANGUAGE_1 #morse-code	TFC 2021	–	Crypto	files wu 3
SEA_LANGUAGE_2 #morse-code	TFC 2021	–	Crypto	files wu 3
SECRET #stack-buffer-overflow	TFC 2021	–	Pwn	files wu 1
Elftek_Secure_Execution_Engine #shellcode #orw #sandbox	X-MAS 2021	–	Pwn	files wu 1
lil_wishes_db #use-after-free (uaf)#tcache #one-gadget	X-MAS 2020	–	Misc	files wu 2
ready_for_xmas #buffer-overflow #ret2system #badchars-bypass	X-MAS 2020	–	Misc	files wu 1
lucky #prng-seed-overwrite #rand-prediction #buffer-overflow	Defcamp 2018 Quals	18.75	Misc	files wu 3
Greetings_from_Santa #buffer-overflow #ret2win #system	X-MAS 2018	–	Misc	files wu 1
I_want_that_toy #format-string #info-leak #rop #ret2libc	X-MAS 2018	–	Misc	files wu 3
Random_Present #buffer-overflow #ret2plt #got-leak #ret2libc	X-MAS 2018	–	Misc	files wu 3
The_Calculator #format-string #arbitrary-write	X-MAS 2018	–	Misc	files wu 1
The_Calculator_2.0 #format-string #arbitrary-write	X-MAS 2018	–	Misc	files wu 1
SuiBank	CTF@AC 2026 Quals	–	Blockchain	files wu 1
blocker	X-MAS 2022	–	Blockchain	files wu 1
bread_bank	X-MAS 2022	–	Blockchain	files wu 3
cookie_market	X-MAS 2022	–	Blockchain	files wu 2
HOLIDAY	TFC 2021	–	Crypto	files wu 3
JUMPY	TFC 2021	–	Pwn	files wu 1
Ace_of_Spades #strcpy-overlap #card-duplication #score-overflow #stack-read-write	PwnThyBytes 2019	25.00	Misc	files wu 1

Challenges