From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Glenn Morris Newsgroups: gmane.emacs.bugs Subject: bug#53876: 27.2; "eval: (X-mode)" is always safe as file local variable Date: Tue, 08 Feb 2022 20:08:14 -0500 Message-ID: References: <0nsfst5mzq.fsf@fencepost.gnu.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="21141"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus (www.gnus.org), GNU Emacs (www.gnu.org/software/emacs/) Cc: 53876@debbugs.gnu.org To: Ignacio Casso Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Wed Feb 09 02:09:12 2022 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1nHbTr-0005N9-Jm for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 09 Feb 2022 02:09:11 +0100 Original-Received: from localhost ([::1]:36100 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nHbTq-0004mu-6c for geb-bug-gnu-emacs@m.gmane-mx.org; Tue, 08 Feb 2022 20:09:10 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:47368) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nHbTi-0004mW-AZ for bug-gnu-emacs@gnu.org; Tue, 08 Feb 2022 20:09:02 -0500 Original-Received: from debbugs.gnu.org ([209.51.188.43]:55280) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1nHbTi-0001UR-15 for bug-gnu-emacs@gnu.org; Tue, 08 Feb 2022 20:09:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1nHbTh-00021e-Tm for bug-gnu-emacs@gnu.org; Tue, 08 Feb 2022 20:09:01 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Glenn Morris Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Wed, 09 Feb 2022 01:09:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 53876 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: security Original-Received: via spool by 53876-submit@debbugs.gnu.org id=B53876.16443689027735 (code B ref 53876); Wed, 09 Feb 2022 01:09:01 +0000 Original-Received: (at 53876) by debbugs.gnu.org; 9 Feb 2022 01:08:22 +0000 Original-Received: from localhost ([127.0.0.1]:49177 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1nHbT4-00020g-2s for submit@debbugs.gnu.org; Tue, 08 Feb 2022 20:08:22 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:40564) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1nHbT2-00020U-4v for 53876@debbugs.gnu.org; Tue, 08 Feb 2022 20:08:20 -0500 Original-Received: from [2001:470:142:3::e] (port=44440 helo=fencepost.gnu.org) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nHbSw-0001QU-Tx; Tue, 08 Feb 2022 20:08:14 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=MIME-Version:In-Reply-To:Date:References:Subject:To: From; bh=S8aHKoQT1yxHpoSAKK+KE8jW0fuJr7ttKfRfULkUb5s=; b=WFNKLQ5ucHVQPVZGNIej ITHcBdhe+twzPtQsGOZ0C/S9yCs/IB/yT8Oh2zC55cT66AOUIvybSKVzIWpAuW7sofC4869hvtyuO qRSM58jCbLrZsM9Eh5180CK5TCUwKScBNfmaJtqOjaofpuKKATSKzYtfEIcQ/MP2gA/mb/ldtePYG DYJOVAzZLQ84TTj6SYlXb6EOTeTUskc2hS8onuV9CU/+k6ico4uzCO1+eN6eYZMF3Xz+hHto+UXmL uDEFvYg5kucpu3/XLd5JSqMNe66hdilAyBWNfqWo3+qKOY9TAmD2OdkSp6fN9FGTY9nJLXXDjGGVp NOCCvBlIIrwTdw==; Original-Received: from rgm by fencepost.gnu.org with local (Exim 4.90_1) (envelope-from ) id 1nHbSw-0003Bg-Ly; Tue, 08 Feb 2022 20:08:14 -0500 X-Spook: Deaths Phreaking Emergency management NCCS NATO Attorney X-Ran: $}h.iDF"V30Mkm_/iXXCO}+af#?fGDKXk9-@0(k]W3dYmN!,4-|/RGm]UV0S{]n/hc1GpN X-Hue: magenta X-Attribution: GM In-Reply-To: <0nsfst5mzq.fsf@fencepost.gnu.org> (Glenn Morris's message of "Tue, 08 Feb 2022 11:42:01 -0500") X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:226424 Archived-At: I suppose the assumption is that code already available in the user's environment is not intrinsically malicious (ie does not contain deliberately harmful mode definitions). Rather the file-local variables safety mechanisms are intended to protect against malicious code actually embedded in the file being visited; something like eval: (shell-command ...). It underlines again the need to be careful about what elisp libraries one installs (although the simple act of installing a package can already directly execute arbitrary code anyway).