Technical Analysis of Non-Recursive Zip Bomb Construction Using File Overlapping
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Summary
This technical article by David Fifield details the construction of a non-recursive zip bomb that achieves extremely high compression ratios through file overlapping within the zip container. Unlike traditional recursive zip bombs that rely on nested archives, this approach exploits the zip format's ability to reference the same compressed data multiple times, creating a small file that expands to enormous sizes when decompressed. The article provides technical explanations, implementation details, and analysis of compression techniques, focusing on the technical aspects of zip file structure and compression algorithms.
Key quotes
· 3 pulledThis article shows how to construct a non-recursive zip bomb that achieves a high compression ratio by overlapping files inside the zip container.
"Non-recursive" means that it does not rely on a decompressor's recursively unpacking zip files nested within zip files:
The technique exploits the zip format's ability to reference the same compressed data multiple times, creating a small file that expands to enormous sizes when decompressed.
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