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Date: Thu, 11 Oct 2018 10:20:17 -0700
From: Tavis Ormandy <>
Subject: Re: ghostscript: bypassing executeonly to escape -dSAFER sandbox (CVE-2018-17961)

On Tue, Oct 9, 2018 at 6:58 AM Tavis Ormandy <> wrote:

> The fix is public now, here are the necessary commit:
A small update, one of these commits was to mark all procedures that use
dangerous operators as operators themselves. The idea is that error
handlers will only see the top-level operator and not any sub-operators (I
know, this is getting complicated).

I noticed a procedure upstream missed, .loadfontloop. Upstream have double
checked if there were any others, and I did too - we think that is all of

So this commit is necessary as well:;a=commitdiff;h=a5a9bf8c6a63

Thanks, Tavis.

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