Date: Tue, 9 Oct 2018 15:32:02 -0700 From: Tavis Ormandy <taviso@...gle.com> To: oss-security@...ts.openwall.com Cc: Bob Friesenhahn <bfriesen@...ple.dallas.tx.us> Subject: Re: ghostscript: bypassing executeonly to escape -dSAFER sandbox (CVE-2018-17961) On Tue, Oct 9, 2018 at 3:27 PM Perry E. Metzger <perry@...rmont.com> wrote: > I keep wondering if there isn't a way to fully remove the dangerous > bits from a postscript interpreter so it can _only_ be used to view > the document and literally has no file system access compiled in at > all, so there's no way to touch the fs etc. regardless of what flags > the interpreter is invoked with. > > (I, too, find removing the ability to look at historical postscript > documents a bit more draconian than I like.) > > I've discussed it with upstream, it's a hard no because they feel it would make ghostscript non-conforming (i.e. non-conforming with the Adobe PostScript Language Reference Manual) We probably have similar thoughts on this, but that is the final word from upstream. Tavis.
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