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One Weird Trick to fix your CTF Payloads

· 6 min read

Noppenheimer

At Defcon CTF Finals, the Final round of LiveCTF went into sudden death. The challenge was named Noppenheimer, a play on the Oppenheimer film that was released, and NOP (NO-OP) instructions.

Contestants had to turn a random sequence of bytes into a gadget/shellcode cave by converting bytes into NOPs, by sending "nuke" Launch commands.

Options:
LAUNCH x,y - Launch a test at position x,y
VIEW - See state of test site
ENDTEST - Conclude testing
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Both teams solved locally. But they couldn't exploit Noppenheimer against the remote system.