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Posted to dev@pdfbox.apache.org by "Andreas Lehmkühler (JIRA)" <ji...@apache.org> on 2017/01/10 18:27:58 UTC
[jira] [Assigned] (PDFBOX-3648) EOFException parsing PDFs with
invalid xref offsets
[ https://issues.apache.org/jira/browse/PDFBOX-3648?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Andreas Lehmkühler reassigned PDFBOX-3648:
------------------------------------------
Assignee: Andreas Lehmkühler
> EOFException parsing PDFs with invalid xref offsets
> ---------------------------------------------------
>
> Key: PDFBOX-3648
> URL: https://issues.apache.org/jira/browse/PDFBOX-3648
> Project: PDFBox
> Issue Type: Bug
> Components: Parsing
> Affects Versions: 2.0.4
> Reporter: Jesse Long
> Assignee: Andreas Lehmkühler
> Priority: Minor
> Attachments: PDFBOX-3648.patch
>
>
> ScratchFileBuffer does not allow seeking past the end of file. If the xref table claims an object offset past the end of file an IOException is incorrectly thrown.
> COSParser.checkObjectKeys() seeks to the offset claimed in the xref table and looks for a valid object number and generation number there.
> If there is an IOException while trying to READ in COSParser.checkObjectKeys(), the exception is caught and the parser falls back to brute force searching for objects offsets.
> The problem is that IOExceptions are not caught when attempting to SEEK to the offset claimed in the xref table. Solution: move the seek operation inside the try {} block.
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