CTF challenges & writeups

7364 challenges · browse all techniques

Challenge	CTF	Weight	Category	Has
sneks #python-bytecode	HSCTF 2021	–	Reverse	files wu 3
stonks #buffer-overflow	HSCTF 2021	–	Pwn	files wu 3
warmup-rev #function-inversion	HSCTF 2021	–	Reverse	files src wu 3
CaesarMirror #rot13	HacktivityCon 2021	–	Crypto	files wu 3
Hexahedron #rsa #rsactftool	HacktivityCon 2021	–	Crypto	files wu 1
Perfect_XOR #xor	HacktivityCon 2021	–	Crypto	files wu 3
Sausage_Links #rsa #wiener-attack #multi-prime-rsa	HacktivityCon 2021	–	Crypto	files wu 1
Triforce #aes-cbc #iv-as-key	HacktivityCon 2021	–	Crypto	files wu 1
Tyrannosaurus_Rex #known-plaintext	HacktivityCon 2021	–	Crypto	files wu 3
Vencryption #vimcrypt	HacktivityCon 2021	–	Crypto	files wu 2
Abnormal #verilog-reversing	ImaginaryCTF 2021	–	Reverse	files wu 1
Awkward_Bypass #blind-sql-injection	ImaginaryCTF 2021	–	Web	files wu 1
Build-A-Website #ssti	ImaginaryCTF 2021	–	Web	files wu 3
Chicken_Caesar_Salad #caesar-cipher	ImaginaryCTF 2021	–	Crypto	files wu 1
Cookie_Stream #stream-cipher-bitflip	ImaginaryCTF 2021	–	Web	files wu 1
Fake_Canary #fake-canary #stack-buffer-overflow	ImaginaryCTF 2021	–	Pwn	files wu 1
Fewer Thoughts, Head Emptier #brainfuck-reversing	ImaginaryCTF 2021	–	Reverse	files wu 1
Flip_Flops #cbc-bit-flipping	ImaginaryCTF 2021	–	Crypto	files wu 2
Foliage #prng-reconstruction	ImaginaryCTF 2021	–	Reverse	files wu 1
Gotta_Go_Fast #double-free	ImaginaryCTF 2021	–	Pwn	files wu 1
Its_Not_Pwn_I_Swear #overridden-stack-check	ImaginaryCTF 2021	–	Reverse	files wu 1
Its_Not_Web_I_Swear #jmp-rsp #shellcode #stack-buffer-overflow	ImaginaryCTF 2021	–	Pwn	files wu 1
Jumprope #xor-keystream	ImaginaryCTF 2021	–	Reverse	files wu 2
Lines #multiplicative-cipher	ImaginaryCTF 2021	–	Crypto	files wu 2
Memory_pile #tcache-double-free #heap	ImaginaryCTF 2021	–	Pwn	files wu 1
Nesting_Snakes #pyinstaller-unpacking	ImaginaryCTF 2021	–	Reverse	files wu 1
New_Technology #weak-key-derivation	ImaginaryCTF 2021	–	Crypto	files wu 2
No_Thoughts_Head_Empty #brainfuck	ImaginaryCTF 2021	–	Reverse	files wu 1
Normal #verilog-reversing	ImaginaryCTF 2021	–	Reverse	files wu 3
Primetime #elgamal #custom-group	ImaginaryCTF 2021	–	Crypto	files wu 1
Rock_Solid_Algorithm #rsa #small-e	ImaginaryCTF 2021	–	Crypto	files wu 1
Roll_it_back #lfsr	ImaginaryCTF 2021	–	Crypto	files wu 1
Roolang #esolang-reversing	ImaginaryCTF 2021	–	Reverse	files wu 1
SaaS #sed-command-injection	ImaginaryCTF 2021	–	Web	files wu 3
Sinking_Calculator #ssti	ImaginaryCTF 2021	–	Web	files wu 1
Stings #substitution-cipher	ImaginaryCTF 2021	–	Reverse	files wu 3
String_Editor_1 #oob-index-write	ImaginaryCTF 2021	–	Pwn	files wu 1
String_Editor_2 #negative-array-index	ImaginaryCTF 2021	–	Pwn	files wu 1
The_First_Fit #use-after-free (uaf)#heap	ImaginaryCTF 2021	–	Pwn	files wu 1
ZKPoD #chosen-ciphertext-attack	ImaginaryCTF 2021	–	Crypto	files wu 2

Challenges