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https://issues.apache.org/jira/browse/PDFBOX-904?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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John Hewson resolved PDFBOX-904.
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Resolution: Fixed
> Potential issue with COSString and UTF-16-encoded Strings.
> ----------------------------------------------------------
>
> Key: PDFBOX-904
> URL: https://issues.apache.org/jira/browse/PDFBOX-904
> Project: PDFBox
> Issue Type: Bug
> Components: PDModel
> Affects Versions: 1.4.0, 2.0.0
> Reporter: Neil McErlean
> Priority: Critical
> Fix For: 2.0.0
>
> Attachments: PDFBOX-904.patch
>
>
> I've been looking into PDFBOX-903 and I came across a potential issue with
> the COSString class.
> The issue occurs when you construct an instance of COSString and pass a
> UTF-16-encoded String.
> The current code (trunk) checks the passed String parameter in the
> constructor to see if it is UTF-16. It does this by looking for char values
> above 255.
> Whilst a String that contains char values greater than 255 is likely to be
> UTF-16, it is possible to have UTF-16-encoded Strings whose characters do not
> exceed this limit.
> These Strings would be incorrectly marked as being not unicode16. An example
> (from the upcoming patch)
> /**してく */
> String textHighBits = "\u3057\u3066\u304f";
> Furthermore, if you construct a COSString using the COSString(byte[])
> constructor, then the COSString class cannot know what the encoding is.
> I will attach a patch in a moment which includes a test case to reproduce the
> issue and a fix for the product code.
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