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Posted to dev@pdfbox.apache.org by "Andreas Lehmkühler (Jira)" <ji...@apache.org> on 2023/03/22 06:52:00 UTC

[jira] [Created] (PDFBOX-5578) Limit maximum number of nesting levels for COSArrays/COSDictionaries

Andreas Lehmkühler created PDFBOX-5578:
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             Summary: Limit maximum number of nesting levels for COSArrays/COSDictionaries
                 Key: PDFBOX-5578
                 URL: https://issues.apache.org/jira/browse/PDFBOX-5578
             Project: PDFBox
          Issue Type: Bug
          Components: Parsing
    Affects Versions: 2.0.27, 3.0.0 PDFBox
            Reporter: Andreas Lehmkühler
         Attachments: 2023_StackOverFlowtest.pdf

The PDFBox user Jay filed an issue with the attached pdf using security@apache.org

It is a handcrafted pdf containing a COSArray with a lot of nesting levels which leads to a StackOverflowException.
Theoretically there is no maximum nesting level for COSArrays or COSDictionaries but in the wild just a few number of levels may occur. Saying that, it makes sense to introduce a maximum number of nesting levels to avoid such exceptions




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