목록전체 글 (24)

deayzl's blog

[Linux kernel] CVE-2022-2590, 공유 메모리에 한정된 Dirty COW

English version of this document is in https://github.com/hyeonjun17/CVE-2022-2590-analysis GitHub - hyeonjun17/CVE-2022-2590-analysis: Dirty COW restricted to shmem in linux kernelDirty COW restricted to shmem in linux kernel. Contribute to hyeonjun17/CVE-2022-2590-analysis development by creating an account on GitHub.github.com  분석 및 테스트 버전: Linux/x86 6.0.0-rc1 (commit 37887783b3fef877bf34b899..
1-day analysis/Linux kernel 2024. 7. 31. 00:35
[HITCON CTF 2024 Quals] antivirus

It was a simple challenge using clamav which parses a binary in a specific rule. https://github.com/Cisco-Talos/clamav GitHub - Cisco-Talos/clamav: ClamAV - Documentation is here: https://docs.clamav.netClamAV - Documentation is here: https://docs.clamav.net - Cisco-Talos/clamavgithub.com run.sh:#!/bin/shdocker run -v /home/ctf/clamav/:/test/ --rm -it clamav/clamav clamscan --bytecode-unsigned -..
CTF writeup/HITCON CTF 2024. 7. 22. 16:12
[DEFCON CTF 32 Quals] pass-it-on analysis : deep dive into swift virtual machine

https://velog.io/@0range1337/CTF-DEF-CON-CTF-Qualifier-2024-pass-it-on-analysis-deep-dive-into-swift-virtual-machine [CTF] DEF CON CTF Qualifier 2024 - pass-it-on analysis : deep dive into swift virtual machineThis challenge is from DEFCON CTF 32 Qualifier (reversing).This post contains my approach of how I tried to solve it and failed before seeing writeup,velog.io
Others 2024. 5. 21. 20:50
[DiceCTF 2024] pain-plus-plus

The binary consists of two functions; main and main[cold]. main: int __cdecl main(int argc, const char **argv, const char **envp) { __int64 v3; // rax char *v4; // rdi char *v5; // rdx char *v6; // rax __int64 v7; // rsi __int64 v8; // rcx signed __int64 v9; // rbx signed __int64 v10; // rax size_t v11; // rdx char *v12; // rsi __int64 v13; // rbx int v14; // ebp char v15; // cl int *v16; // rdi..
CTF writeup/Others 2024. 2. 5. 18:28
[HITCON CTF 2023 Quals] LessEQualmore

I did play this ctf as team 프로그램털모찌.It was about 7 am for me in korea when I solved this.I spent the night with no sleep. Then I fell asleep right after I solved this.I realized that.. guys, try to sleep at the appropriate time, or you gon miss upcoming challenges.When I opened my eyes, there was already "subformore" released long time ago :((this is why I could only give an aaw primitive functi..
CTF writeup/HITCON CTF 2023. 9. 12. 02:39
워게임 1년 차의 회고록 (feat. BoB 합격)

보호되어 있는 글입니다.
Others 2023. 6. 22. 02:18
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