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Posted to dev@pdfbox.apache.org by "Andreas Lehmkühler (JIRA)" <ji...@apache.org> on 2019/05/19 13:48:00 UTC
[jira] [Reopened] (PDFBOX-4550) Poor performance with corrupt
ToUnicode stream
[ https://issues.apache.org/jira/browse/PDFBOX-4550?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Andreas Lehmkühler reopened PDFBOX-4550:
----------------------------------------
As discussed on the mailing list, we have to solve the underlying issue to omit the workaround.
We should add the following checks:
- end value has to be greater than the start value
- according to the spec a given range can not represent more than 255 values
> Poor performance with corrupt ToUnicode stream
> ----------------------------------------------
>
> Key: PDFBOX-4550
> URL: https://issues.apache.org/jira/browse/PDFBOX-4550
> Project: PDFBox
> Issue Type: Bug
> Components: Rendering, Text extraction
> Affects Versions: 2.0.15
> Reporter: Tilman Hausherr
> Assignee: Andreas Lehmkühler
> Priority: Major
> Fix For: 2.0.16, 3.0.0 PDFBox
>
>
> A confidential file with lots of corrupt streams has ToUnicode stream with corrupt contents in the beginbfrange segment where start and end have different lengths. This leads to poor performance. Such entries can be skipped.
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