Pwnable KR - unlink

문제 unlink 취약점을 공부하는 문제. unlink@prowl:~$ ls -l total 20 -r--r----- 1 root unlink_pwn 49 Nov 23 2016 flag -rw-r----- 1 root unlink_pwn 543 Nov 28 2016 intended_solution.txt -r-xr-sr-x 1 root unlink_pwn 7540 Nov 23 2016 unlink -rw-r--r-- 1 root root 749 Nov 23 2016 unlink.c #include <stdio.h> #include <stdlib.h> #include <string.h> typedef struct tagOBJ{ struct tagOBJ* fd; struct tagOBJ* bk; [Read More]

Pwnable KR - asm

문제 asm@prowl:~$ ls -l total 28 -rwxr-xr-x 1 root root 13704 Nov 29 2016 asm -rw-r--r-- 1 root root 1793 Nov 29 2016 asm.c -rw-r--r-- 1 root root 211 Nov 19 2016 readme -rw-r--r-- 1 root root 67 Nov 19 2016 this_is_pwnable.kr_flag_file_please_read_this_file.sorry_the_file_name_is_very_loooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo0000000000000000000000000ooooooooooooooooooooooo000000000000o0o0o0o0o0o0ong asm@prowl:~$ cat readme once you connect to port 9026, the "asm" binary will be executed under asm_pwn privilege. make connection to challenge (nc 0 9026) then get [Read More]

Racket 설치하고 SICP 실습하기

우분투 터미널 환경에서 racket을 설치하고 vim으로 코드를 작성하여 sicp 예제를 실행하기 위한 환경을 설정하는 것 vim 버전이 쫌 높아야 되는 걸루 기억 racket 설치 sudo add-apt-repository [Read More]

사지방 DNS 설정

DNS 서버 변경 Cloudflare Public DNS Server netsh interface ip set dns "로컬 영역 연결" static 1.1.1.1 primary netsh interface ip add dns "로컬 영역 연결" 1.0.0.1 ipconfig /flushdns IBM Public DNS Server netsh interface ip set dns " [Read More]