hack.lu 2023 Writeup
This writeup contains an interesting mXSS challenge, named awesome-note-2, from the hack.lu this year.
Read moreSEETF 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.
Read moreJustCTF 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..
Read morep4CTF 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.
Read moremeloCon CTF 2023 Writeup
At meloCon 2023, I attempted to solve two pwn challenges. The NoRegVM chall has multiple vulnerabilities but turned out that only the fmt vulnerability is exploitable. I utilized the double-staged fmt exploitation again which I just learned from the last week.
Read moreSDCTF 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.
Read moreUMD CTF 2023 Writeup
This is the writeup for the umd ctf 2023 which was held by the University of Maryland. They provided a lot of interesting challenges in the Pokemon theme which I really enjoy :>.
Read more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!
Read moreidekCTF 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!
Read moreRealWorld CTF 2023 Writeup
Another writeup for the ReadWorld 2023 CTF. Here are the baby-level and normal-level challenges, but they are actually not easy at all.
Read more