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SEETF 2023 Writeup

This weekend I participated in the SEETF 2023 event. The challenges are in good quality (two needs brute force). And I managed to solve a heap binary compiled with gilibc version 2.35 by abusing the exit handler since malloc_hook and free_hook are removed after 2.34.

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WriteupPwn

JustCTF 2023 Writeup

Over the weekend, I made headway with several pwn challenges in Just CTF. One particularly instructive challenge required us to exploit the sqlite3 database using the command-line interface. Confronting and pwning a complex, large binary has always been a struggle for me. To learn from these challenges, I compiled several solutions, specifically focusing o..

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WriteupAI SecurityPwnWeb

p4CTF teaser 2023 Writeup

I also participated in the p4 ctf last weekend. I managed to solve two AI-related challenges, reminding me of the materials that I was doing during my undergraduate studies. There is also an interesting blind pwn challenge about fmt and uninitialized read vulnerability.

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WriteupPwn

SDCTF 2023 Writeup

The money-printer-2 challenge is a really interesting format string challenge. It shows a cool fmt exploit technique that leverages chained pointer and brute forcing which I haven't seen before.

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Pwnpwn.college

Dynamic Allocator Misuse(Tcache) - pwn.college

Here is my write-up for the dynamic-allocator-misuse(heap) module of the pwn.college. Due to the disclosure agreement, I won't post the full exploit but the PoC code to show the idea of the solutions. Glad to see they are adding more challenging levels at the end. Have fun.

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WriteupPwn

西湖论剑 WestLake 2022 babycalc

I was delighted to play in the WestLake CTF this year alongside my younger schoolmates and to see their high level of skill despite being only sophomores. Kudos to the younger generation, their future is certainly promising!

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WriteupPwnWeb

idekCTF 2022 Writeup

idek2022 has provided several challenges with good quality. The sprintf challenge is a "wired" format string challenge in which I have summarized 3 different impressive approaches. Check them out!

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