dannymas / zip-bomb

Create a ZIPBomb for a given uncompressed size (flat and nested modes).

ZipBomb

A zip bomb, also known as a zip of death or decompression bomb, is a malicious archive file designed to crash or render useless the program or system reading it.

This is a small script written in Python which generates such a zip bomb. It is based on this repo but it receives uncompressed size as input and provides two modes: nested and flat.

Usage

Creates ZIP bomb archive

<mode> - mode of compression
  nested - nested zip file (zip file of zip files of ...)
  flat   - flat file without nested zips
<size> - decompression size in MB
<out_zip_file> - path to destination file

Sample Run - Flat mode

python zip-bomb.py flat 1024 out.zip

Output

Compressed File Size: 1020.36 KB
Size After Decompression: 1020 MB
Generation Time: 29.44s

Sample Run - Nested mode

python zip-bomb.py nested 1024 out.zip

Output

Warning: Using nested mode. Actual size may differ from given.
Compressed File Size: 1.90 KB
Size After Decompression: 4590 MB
Generation Time: 5.82s