Re: [Acme] I-D Action: draft-ietf-acme-tls-alpn-00.txt
Jacob Hoffman-Andrews <jsha@eff.org> Tue, 06 March 2018 00:42 UTC
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To: Tim Hollebeek <tim.hollebeek@digicert.com>, "acme@ietf.org" <acme@ietf.org>
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From: Jacob Hoffman-Andrews <jsha@eff.org>
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Date: Mon, 05 Mar 2018 16:42:15 -0800
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Archived-At: <https://mailarchive.ietf.org/arch/msg/acme/KnF69poEWi9_Fo3FFKJejAwWul8>
Subject: Re: [Acme] I-D Action: draft-ietf-acme-tls-alpn-00.txt
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On 03/05/2018 04:37 PM, Tim Hollebeek wrote: > I think we may come to regret using that trick so much. Such schemes > are only one software bug away from having rather profound effects > on trust decisions and the entire ecosystem. This is a good point, but an important mitigating factor is that these are self-signed certificates, as compared to CT's precertificates, which are signed by a trusted issuer but poisoned. And they are only presented when the acme/1 ALPN is negotiated. So you'd need three software bugs, each of which would be a game-over bug on its own: - ignoring a critical extension - trusting a self-signed certificate - sending acme/1 ALPN for non-validation traffic
- [Acme] I-D Action: draft-ietf-acme-tls-alpn-00.txt internet-drafts
- Re: [Acme] I-D Action: draft-ietf-acme-tls-alpn-0… Tim Hollebeek
- Re: [Acme] I-D Action: draft-ietf-acme-tls-alpn-0… Jacob Hoffman-Andrews
- Re: [Acme] I-D Action: draft-ietf-acme-tls-alpn-0… Tim Hollebeek
- Re: [Acme] I-D Action: draft-ietf-acme-tls-alpn-0… Corey Bonnell