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Shell 0.55% JavaScript 6.06% C++ 14.46% Python 46.90% PHP 0.72% Assembly 1.14% Nim 10.23% Makefile 0.17% HTML 7.31% Dockerfile 1.62% Sage 10.83%

my-ctf-challenges's Introduction

My CTF Challenges

This is some challenges I created for CTF competitions.

TSJ CTF 2022

It is recommended to read Crypto writeups here, because it supports math rendering. 2022/05/22: GitHub supports MathJax rendering on GitHub now, but it still have some compatibility issues, so you might still want to use the url above when having issues.

Name	Category	Tags	Difficulty
Futago	Crypto, CSC	RSA	★
RNG++	Crypto	LCG	★★
babyRSA	Crypto	RSA, ECC	★★
Top Secret	Crypto	GF, dlog	★★☆
Cipher Switching Service	Crypto	RSA, ElGamal	★★☆
Signature	Crypto	ECDSA, LLL, AES-CTR	★★★
RNG+++	Crypto	LCG, LLL	★★★☆
Nim Notes	Web	Script Gadgets, CSRF, CRLF Injection, CSP	★★★☆
Genie [1]	Web, Crypto	Path traversal, AES-CBC, Deserialization	★★★☆
Just a pyjail	Misc	Pyjail	★★★

[1]: This challenge is made by both @splitline and me.

ImaginaryCTF

Name	Category	Tags	Difficulty
Really Simple Algorithm	Crypto	RSA, Continued Fractions	★★
Minimal	Pwn	Stack pivoting, read(2) return value, SROP	★★

AIS3 Pre-exam 2022

Name	Category	Tags	Difficulty
JeetQode	Misc	PPC, JQ	★☆
B64DLE	Misc	AES-CTR, Pickle, Python Format String	★★☆
SC	Crypto	Classic	☆
Fast Cipher	Crypto	Modular Arithmetic	☆
shamiko	Crypto	SHA1 Collision, DSA	★☆
Really Strange oRacle	Crypto	GCD, Binomial Theorem	★☆
pettan	Crypto	RSA Small Message, MT19937, Related Message	★★☆
pekobot	Crypto	Invalid Curve Attack	★★★
Flag Checker	Reverse	ROP, Pickle, Single Prime RSA	★★
Private Browsing	Web	SSRF, Redis, PHP Deserialization	★★
UTF-8 Editor	Pwn	C++, std::vector, OOB, GOT overwrite	★★
SAAS	Pwn	C++, Copy Constructor, UAF	★★☆

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