If pdf.js is used to load a malicious PDF, and PDF.js is configured with isEvalSupported
set to true
(which is the default value), unrestricted attacker-controlled JavaScript will be executed in the context of the hosting domain.
The patch removes the use of eval
:
https://github.com/mozilla/pdf.js/pull/18015
Set the option isEvalSupported
to false
.
https://bugzilla.mozilla.org/show_bug.cgi?id=1893645