Description
Zip4j through 2.11.2, as used in Threema and other products, does not always check the MAC when decrypting a ZIP archive.
Remediation
References
https://breakingthe3ma.app
https://breakingthe3ma.app/files/Threema-PST22.pdf
https://github.com/srikanth-lingala/zip4j/issues/485
https://github.com/srikanth-lingala/zip4j/releases
https://news.ycombinator.com/item?id=34316206
https://threema.ch/en/blog/posts/news-alleged-weaknesses-statement
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