Friday 23 November 2018

Path traversal in mozilla pdf.js

Hi Internet,

Summary: A path traversal issue was observed in Mozilla PDF.js which is a PDF reader in JavaScript. (This issue is unpatched)

This issue was observed while code review of PDF.js (gulpfile.js)

PDF.js is built into version 19+ of firefox and a chrome extension is also available on chrome web store. To install and get a local copy of PDF.js here are the below steps :

Then navigate to

I've used the attribute --path-as-is from cURL to verify this issue.

This was reported to mozilla via bugzilla but team says "The server with pdf.js is intended to be a development server and should not be exposed to public networks. I suppose we could update the docs to state that." and a upstream issue was filed against this[1].

Thank you

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