$ ctf42

ImaginaryCTF 2021

CTFtime official repo

We run daily ctf challenges on discord and our website with rounds which last a month each. We accept individuals as well as teams.

Web 8

Challenge Has
Awkward_Bypass
#blind-sql-injection
 files wu 1
Build-A-Website
#ssti
 files wu 3
Cookie_Stream
#stream-cipher-bitflip
 files wu 1
JSON_but_not_notation files
SaaS
#sed-command-injection
 files wu 3
Sinking_Calculator
#ssti
 files wu 1
Super_Quantum_League files
aMAZEing-challenge files

Pwn 29

Challenge Has
A_little_birdie_told_me files
Blind_Shell files
Fake_Canary files
Form_a_String files
Frozen_exploit files wu 1
Gotta_Go_Fast
#double-free
 files wu 1
Green_shell files
ICICLE_Jail files
Its_Not_Web_I_Swear files
Librarian_2 files
Memory_pile files
ROPnCall files
String_Editor_1
#oob-index-write
 files wu 1
String_Editor_2
#negative-array-index
 files wu 1
The_First_Fit files
The_GOAT files
Uncrashable files
aaa files
bbb files
canaries files
eyes-on-stack files
inkaphobia
#format-string
 files wu 2
linonophobia
#ret2libc
 files wu 1
overflowwwwwwwww files
ovvvvvvvvvverflow files
ret2libc files
ret2win files
stackoverflow
#stack-overflow
 files wu 3
syscall_me_maybe files

Reverse 29

Challenge Has
Abnormal
#verilog-reversing
 files wu 1
An_ICICLE_to_Remember files
Arabica files
Ask_Hell files
Ay_Yi_Yi files
Bullet_time files
Foliage
#prng-reconstruction
 files wu 1
Go_Fish files
ICICLEs_Facing_the_Sky files
Identity files
Introductory_ICICLE files
Its_Not_Pwn_I_Swear
#overridden-stack-check
 files wu 1
Jumprope
#xor-keystream
 files wu 2
Keycode files
Mission_Impossible files
Nesting_Snakes
#pyinstaller-unpacking
 files wu 1
No_Thoughts_Head_Empty
#brainfuck
 files wu 1
Normal
#verilog-reversing
 files wu 3
ReDOS files
Regular_Reversing files
Roolang
#esolang-reversing
 files wu 1
Salty files
Stings
#substitution-cipher
 files wu 3
Winnie files
filling-blanks files wu 1
lookup-rev files
pyrev files
vnpack files
Fewer Thoughts, Head Emptier files

Crypto 30

Challenge Has
3ll1pt1c_R1n95 files
Add_and_Add files
Bland_RSA files
Caesar_Tart files
Chicken_Caesar_Salad files
Countdown_Baseball files
Do_Some_Arithmetic files
Easy_Crypto_Challenge files
Enigma files
Flip_Flops
#cbc-bit-flipping
 files wu 2
Horst files
Lines
#multiplicative-cipher
 files wu 2
New_Technology
#weak-key-derivation
 files wu 2
Optimal_RSA files
Password_Recovery_Pt_1 files
Password_Recovery_Pt_2 files
Password_Recovery_Pt_3 files
Primetime files
Reversing_Some_Algorithms files
Rock_Solid_Algorithm files
Roll_it_back files
Rotations files
Rotations_of_a_different_kind files
Suspicious_Server files
Textbook_RSA_2_Timmy_the_Lonely_Oracle files
Too_Old files
ZKPoD
#chosen-ciphertext-attack
 files wu 2
neat-rsa files
neatX2-rsa files
small_enough files

Misc 1

Challenge Has
steg files