this post was submitted on 15 Jul 2023
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Technology

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Literally one of the worst formats I deal with daily, from a security standpoint are PDFs. Very useful and predictable for the end user; yes, but very dangerous for the capabilities it allows.

Dangerzone works like this: You give it a document that you don't know if you can trust (for example, an email attachment). Inside of a sandbox, Dangerzone converts the document to a PDF (if it isn't already one), and then converts the PDF into raw pixel data: a huge list of RGB color values for each page. Then, in a separate sandbox, Dangerzone takes this pixel data and converts it back into a PDF.

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[–] [email protected] 12 points 1 year ago* (last edited 1 year ago) (3 children)

So it basically rasterizes it? I wonder how it affects file size

[–] [email protected] 8 points 1 year ago (1 children)

No mention of OCR? Copy-pasting links or data will be a joy..

[–] [email protected] 2 points 1 year ago

There is an optional Ocr pass, from what I understand

[–] [email protected] 3 points 1 year ago

Oh, I think you already know.

[–] [email protected] 1 points 1 year ago

Yeah, definitely increases the size and removes some functionality that others may rely on. But for presentation of content which is what a PDF SHOULD BE, then it has typically worked fine. I've been using pandoc and some home grown scripts to do this sort of thing for a while.

[–] [email protected] 3 points 1 year ago

Cool concept.

[–] [email protected] 3 points 1 year ago

This is looking like it'll be a valuable tool I'll use frequently.

[–] [email protected] 2 points 1 year ago

I don’t know the pdf format very well, is it possible to just drop a few commands that make it vulnerable?

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