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Solve : The works of Shakespeare, encoded in a JPEG posted to Twitter? |
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Answer» https://twitter.com/David3141593/status/1057042085029822464 Just tried this, and it works. On Linux, you can extract the encoded binary by downloading the image, and renaming it to for instance shakespeare.zip. Direct link to the image: https://pbs.twimg.com/media/DqteCf6WsAAhqwV.jpg then to extract the binary Code: [Select]unzip shakespeare.zip It extracts to a multi-part rar archive. Then Code: [Select]unrar e shakespeare.part001.rar To extract a single HTML file containing the works of Shakespeare. This seems like a pretty SIGNIFICANT loophole (Twitter allows arbitrary data to be encoded in a JPEG, and serves the JPEG without removing it.) .. it means Twitter is ESSENTIALLY a file SHARING platform - you can share any binary zip file by encoding it in a JPEG and posting it to Twitter. I EXPECT Twitter to be making changes to how they process JPEGs, pronto... story on hacker news https://news.ycombinator.com/item?id=18342042 |
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