On Wed, Jul 6, 2016, at 10:28 PM, Ian Jackson wrote: > Kan-Ru Chen writes ("Re: Bug#830143: mupdf's libjs can talk to the > terminal and interact"): > > Thanks for the report. Why did you think this is Severity: serious and > > Tags: security? Is the js console vulnerable to arbitrary code > > execution? > > My initial report describes a denial of service on a web browser.
While blocking the GUI because the program is reading from the tty is bad user experience, I don't think it's a security issue since it requires you to use the special configuration of firefox. MuPDF is normally executed from command line. Anyway I will make a patch to disable this feature in next upload because I think it's a poor implementation and very confusing. I'll forward this issue to upstream. Thanks again for reporting. Kanru > Ian.