usage: CVE-2011-2523.py [-h] [-v] RHOST RPORT

vsFTPd 2.3.4 CVE-2011-2523 PoC. Reference: https://nvd.nist.gov/vuln/detail/CVE-2011-2523

positional arguments:
  RHOST          target address
  RPORT          target port

optional arguments:
  -h, --help     show this help message and exit
  -v, --version  show program's version number and exit