Re: [quicwg/base-drafts] Required state for retaining unacked RETIRE_CONNECTION_ID frames is unbound (#3509)

Kazuho Oku <notifications@github.com> Thu, 12 March 2020 02:09 UTC

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Subject: Re: [quicwg/base-drafts] Required state for retaining unacked RETIRE_CONNECTION_ID frames is unbound (#3509)
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Just to be clear, while I used RPT as a way of mounting the attack, I think it is not a requirement.

A malicious client can repeatedly migrate to a new address, initiating the use of new CID pairs, at the same time intentionally not acknowledging packets containing RETIRE_CONNECTION_ID frames sent from the server. If the client does that, the number of CIDs that the server has to track for retirement increases as time goes.

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