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Re: [quicwg/base-drafts] allow dropping of Initial packets with invalid reserved bits (#2053)

MikkelFJ <notifications@github.com> Mon, 26 November 2018 13:47 UTC

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Subject: Re: [quicwg/base-drafts] allow dropping of Initial packets with invalid reserved bits (#2053)
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> I don't see what this is buying us. In order to generate a packet which deprotects successfully but has bogus reserved bits, the attacker must know the CID, which effectively means it must be on-path

That is right, but it does happen offer a fast rejection of random packets (unless we require full AEAD verification to avoid timing attacks, which I think we do?). Fast rejection can be useful in DDoS attacks.

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