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Solving a CTF flag checker

Inspects a DownUnderCTF binary, finds its checking functions, turns the masks and sums into equations and confirms the solved flag against the original program.

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REA team@REA team

Use REA to solve DownUnderCTF's masked squares flag checker. Find the checking functions, extract the masks and compare a recovered flag with the original program.

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この事例について

Inspects a DownUnderCTF binary, finds its checking functions, turns the masks and sums into equations and confirms the solved flag against the original program.

Why it is listed: A CTF challenge: the intended, legitimate use.

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原文 / README

Use REA to solve DownUnderCTF's masked squares flag checker. Find the checking functions, extract the masks and compare a recovered flag with the original program.

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