Re: [quicwg/base-drafts] introduce a version alias mechanism (#2573)

Kazuho Oku <> Mon, 01 April 2019 05:18 UTC

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From: Kazuho Oku <>
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Subject: Re: [quicwg/base-drafts] introduce a version alias mechanism (#2573)
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In addition to what @mikkelfj points out, a middlebox can inject a VN and force the client to retransmit the Initial packet in the version the middlebox prefers. Note that such an attack would not be noticed, because we are removing downgrade prevention from the VN design.

I think that the proposed approach works as an anti-ossification mechanism, but I do not think it's anything more than that.

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