radare2
0x00 Debug mode (ref: Radare2 Book) We can use $ r2 -d <binary> to open r2 with debug mode. There are several commands in debug mode: > d? ; get help on debugger commands > ds 3 ; step 3 times > db 0x8048920 ; setup a breakpoint > db -0x8048920 ; remove
pwnable.kr
Write-up for random in pwnable.kr. 0x00 Puzzle Daddy, teach me how to use random value in programming! ssh random@pwnable.kr -p2222 (pw:guest) 0x01 Explore ssh into the Ubuntu and here we get: $ ssh random@pwnable.kr 2222 random@ubuntu:~$ ls -l total 20 -r--r----- 1 random_pwn
pwnable.kr
Write-up for passcode of pwnable.kr 0x00 Puzzle Mommy told me to make a passcode based login system. My initial C code was compiled without any error! Well, there was some compiler warning, but who cares about that? ssh passcode@pwnable.kr -p2222 (pw:guest) 0x01 Explore I'm