Return-Path: X-Original-To: json@ietfa.amsl.com Delivered-To: json@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 9048F21E814E for ; Sun, 6 Oct 2013 22:02:17 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.187 X-Spam-Level: X-Spam-Status: No, score=-2.187 tagged_above=-999 required=5 tests=[AWL=0.412, BAYES_00=-2.599, HTML_MESSAGE=0.001, NO_RELAYS=-0.001] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id g35oGslo1FhH for ; Sun, 6 Oct 2013 22:02:17 -0700 (PDT) Received: from mail-qc0-x22d.google.com (mail-qc0-x22d.google.com [IPv6:2607:f8b0:400d:c01::22d]) by ietfa.amsl.com (Postfix) with ESMTP id 42C6721E8151 for ; Sun, 6 Oct 2013 22:02:14 -0700 (PDT) Received: by mail-qc0-f173.google.com with SMTP id c3so4439205qcv.4 for ; Sun, 06 Oct 2013 22:02:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=V7B5gDJCvkpww3R2+47Y14nZd2giQFmmDNzRV2GtyU0=; b=u+HahlLP+evLwuBXdfTzsCvumaqkgE3eyNxVse2kgJlofPRMTG6/DMwcg9pEzmSKmi gy8I4mCI2R9Z/CGZ1A+3mrbPUhH+FSOhhiwJz1Y75QsTw0m003qHrcA+34+q28MGdF61 SXqopMsHzdLG7ptJiW+4B4Gl8LgJ1g4yg3BHwELDaHdjwfdhMzvTXEGzgSAZiSkyMLTI vNRZ9Xh2xgtDKH6xWiy+N0XnK6OSgj/fMBn8OYi0pRm69JzIbacEv3wER4/Wqk6NLRSG upT9NRkueht/Sf/oxXQl55qW97e70bGjJExclSxugoOQOpKZbPFfVaY8byqtKBxLCj0t tbuw== MIME-Version: 1.0 X-Received: by 10.49.30.66 with SMTP id q2mr34001511qeh.38.1381122133729; Sun, 06 Oct 2013 22:02:13 -0700 (PDT) Received: by 10.140.86.147 with HTTP; Sun, 6 Oct 2013 22:02:13 -0700 (PDT) In-Reply-To: References: <7C4636E2-2819-4FD9-819F-A3594DADA711@tzi.org> <20131007014220.GR7224@mercury.ccil.org> <8DD26019-C037-4E66-ADD8-AE01832E5EE1@vpnc.org> Date: Sun, 6 Oct 2013 22:02:13 -0700 Message-ID: From: R S To: Tim Bray Content-Type: multipart/alternative; boundary=047d7bdc90be2c289b04e81f8e13 Cc: John Cowan , Paul Hoffman , "json@ietf.org" Subject: Re: [Json] Security considerations X-BeenThere: json@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "JavaScript Object Notation \(JSON\) WG mailing list" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 07 Oct 2013 05:02:17 -0000 --047d7bdc90be2c289b04e81f8e13 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable On Sunday, October 6, 2013, Tim Bray wrote: > What is the argument against including a conventional warning against a > plausible-but-dangerous practice? The only one I can think of is =93ever= yone > already knows that=94 which doesn=92t seem very strong to me. > It's worse than that. RFC 4627 has text that says a JSON string can be passed to eval() if it passes an inadequate regex. This text should be corrected, not just omitted. - Rob > > On Sun, Oct 6, 2013 at 8:19 PM, Paul Hoffman > > wrote: > >> On Oct 6, 2013, at 8:18 PM, Tim Bray > >> wrote: >> >> > You mean will not cover might-make-you-safe regex, or will not warn of >> the dangers of eval()? >> >> Correct. >> >> --Paul HOffman >> _______________________________________________ >> json mailing list >> json@ietf.org >> https://www.ietf.org/mailman/listinfo/json >> > > --047d7bdc90be2c289b04e81f8e13 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable

On Sunday, October 6, 2013, Tim Bray wrote:
What is the argument against including a con= ventional warning against a plausible-but-dangerous practice?=A0 The only o= ne I can think of is =93everyone already knows that=94 which doesn=92t seem= very strong to me.

It's worse than that.
=
RFC 4627 has text that=A0says a JSON string can be passed to= eval() if it passes an inadequate regex. This text=A0should be corrected, = not just omitted.=A0
=A0
- Rob



On Sun, Oct 6, 2013 at 8:19 PM, Paul Hoffman <paul.hoffman@vpnc.org> wrote:
On Oct 6, 2013, at 8:18 PM, Tim Bray &l= t;tbray@textuality.com> wrote:

> You mean will not cover might-make-you-safe regex, or will not warn of= the dangers of eval()?

Correct.

--Paul HOffman
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