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minizip: Check length of comment, filename, and extra field, in zipOpenNewFileInZip4_64 #843

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minizip: Check length of comment, filename, and extra field, in zipOpenNewFileInZip4_64 #843

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Commits on Aug 18, 2023

  1. minizip: Check length of comment, filename, and extra field, in zipOp… 

    …enNewFileInZip4_64

These are stored in 16-bit fields in the zip file format. Passing longer
values would generate an invalid file.

Passing very long values could also cause the computation of
zi->ci.size_centralheader to overflow, which would cause heap buffer
overflow on subsequent writes to zi->ci.central_header.
    @zmodem
    zmodem committed Aug 18, 2023
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