Raise MalformedPDFError when xref offset is a negative number

yob / pdf-reader

The PDF::Reader library implements a PDF parser conforming as much as possible to the PDF specification from Adobe.

MIT License

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Raise MalformedPDFError when xref offset is a negative number #435

Closed yob closed 2 years ago

yob commented 2 years ago

A byte offset < 0 doesn't make much sense. This is unlikely to happen, but in theory some corrupted PDFs might have a line that looks like a negative int preceding the %%EOF

This was highlighted by the fuzzer added in #429