TSG 2021

official repo

TSG is the official computer society of The University of Tokyo, and also the name of the CTF team organized by its members. We promise fun and non-guessy challenges for you! As a bonus, the greatest team will be awarded a prize with $$$ thanks to Flatt Security Inc. Don’t miss it!

Infra sponsored by g.co/cloud.

Web 4

Challenge	Has
beginners_web_2021 #race-condition	files wu 1
giita #prototype-pollution #xss	files wu 1
udon	files wu 2
welcome_to_tsgctf	files wu 1

Pwn 7

Challenge	Has
beginners_pwn	files
catastrophe	files wu 1
chat	files wu 1
cheap	files wu 2
cling	files wu 1
coffee #format-string #got-overwrite #stack-pivot	files wu 2
lkgit #kernel-race-condition #userfaultfd	files wu 2

Reverse 3

Challenge	Has
beginners_rev_2021 #reversing #frida	files wu 1
natural_flag_processing	files
optimized #reversing #self-modifying-code	files wu 2

Crypto 5

Challenge	Has
baba_is_flag #signature-forgery	files wu 1
beginners_crypto_2021 #rsa #common-modulus #low-exponent	files wu 1
flag_is_win #ecdsa #ehnp #lattice	files wu 2
minimalist's_private #rsa #factorization	files wu 1
this_is_dsa	files wu 3

Misc 2

Challenge	Has
lumberjack_against_nature	files wu 1
lumberjack_in_nature	files wu 1