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Hack.lu CTF 2014: breakout

Category: Exploiting Points: 500 Author: r1cky Description:

You are currently putting a team together for your next big heist, robbing the biggest bank in town. Unfortunately the bank has the best security system available. Your best bet is Gus Oakley, he is known for his excotic exploiting techniques. But he is currently imprisoned, which means you have to break him out.

One of your team members managed to gain access to a prison control system running on the main sever. On the server is a file (“flag”) which contains the master key for all doors inside the prison. He also obtained the source code of the service, along with more informations about the system:

service running at: nc wildwildweb.fluxfingers.net 1404

kernel: Linux breakout 3.13.0-37-generic #64-Ubuntu SMP Mon Sep 22 21:28:38 UTC 2014 x86_64 GNU/Linux

libs:

  • libc-2.19.so (7b6bbcea6627deace906d80edaefc631)
  • libgcc.so (811b3fc49164d5e9bff7d8ba28c960f0)
  • libstdc++.so.6.0.19 (d57085f9589bad60675e16bdfe2f402e)

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