From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Paul Eggert Newsgroups: gmane.emacs.devel Subject: Re: Avoiding arbitrary code execution with macroexpansion Date: Thu, 16 Aug 2018 13:52:37 -0700 Organization: UCLA Computer Science Department Message-ID: <3767608a-90f8-8606-8cb2-07acfe9b509b@cs.ucla.edu> References: NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Trace: blaine.gmane.org 1534452678 24816 195.159.176.226 (16 Aug 2018 20:51:18 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Thu, 16 Aug 2018 20:51:18 +0000 (UTC) User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 To: Wilfred Hughes , emacs-devel Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Thu Aug 16 22:51:14 2018 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1fqPEg-0006K0-IK for ged-emacs-devel@m.gmane.org; Thu, 16 Aug 2018 22:51:14 +0200 Original-Received: from localhost ([::1]:58093 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fqPGl-0007kn-Dj for ged-emacs-devel@m.gmane.org; Thu, 16 Aug 2018 16:53:23 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:58334) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fqPG8-0007ka-Qi for emacs-devel@gnu.org; Thu, 16 Aug 2018 16:52:45 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fqPG3-0008J6-Lh for emacs-devel@gnu.org; Thu, 16 Aug 2018 16:52:44 -0400 Original-Received: from zimbra.cs.ucla.edu ([131.179.128.68]:54468) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fqPG3-0008Iu-FX for emacs-devel@gnu.org; Thu, 16 Aug 2018 16:52:39 -0400 Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id B1EF2160516; Thu, 16 Aug 2018 13:52:38 -0700 (PDT) Original-Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id VWI1XvamvsfO; Thu, 16 Aug 2018 13:52:37 -0700 (PDT) Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id B73331605B1; Thu, 16 Aug 2018 13:52:37 -0700 (PDT) X-Virus-Scanned: amavisd-new at zimbra.cs.ucla.edu Original-Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id lMyf76dhaG7V; Thu, 16 Aug 2018 13:52:37 -0700 (PDT) Original-Received: from [192.168.1.9] (unknown [47.154.30.119]) by zimbra.cs.ucla.edu (Postfix) with ESMTPSA id 7732C160516; Thu, 16 Aug 2018 13:52:37 -0700 (PDT) In-Reply-To: Content-Language: en-US X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 131.179.128.68 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:228606 Archived-At: Wilfred Hughes wrote: > This means that I can get arbitrary code execution by you opening and > calling code completion a maliciously crafted elisp file! > > Is this a security bug in Emacs? Sounds like it. I suggest constructing a complete, self-contained and hopefully easy way to reproduce the problem with emacs -Q, and sending it in a bug report to bug-gnu-emacs@gnu.org. Thanks.