Re: [quicwg/base-drafts] handling of coalesced packets with decryption errors creates DoS opportunity (#2308)
Kazuho Oku <notifications@github.com> Mon, 07 January 2019 04:41 UTC
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Subject: Re: [quicwg/base-drafts] handling of coalesced packets with decryption errors creates DoS opportunity (#2308)
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> However, if the keys are available, and decryption fails, this means that the peer sent an invalid packet (or that we're dealing with an on-path attacker, which we can't do anything against anyway). Doesn't decryption failure happen also when the packet gets corrupt while being transmitted? Consider a coalesced packet sent by client that contains Initial (for ACKing ServerHello) and a Handshake packet. I'd assume that we'd prefer processing Handshake packet even if Initial was corrupt. > Since it's possible to coalesce about 70 QUIC packets into a single 1200 byte datagram, an attacker could cause a peer to attempt 70 AEAD operations with a single datagram. Does that matter, considering the fact that an attacker can force AEAD operation for every 21 bytes by using a short header packet (1 type + 4 byte space + 16 byte AEAD tag)? -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/quicwg/base-drafts/issues/2308#issuecomment-451820314
- [quicwg/base-drafts] handling of coalesced packet… Marten Seemann
- Re: [quicwg/base-drafts] handling of coalesced pa… Kazuho Oku
- Re: [quicwg/base-drafts] handling of coalesced pa… Marten Seemann
- Re: [quicwg/base-drafts] handling of coalesced pa… Kazuho Oku
- Re: [quicwg/base-drafts] handling of coalesced pa… Marten Seemann
- Re: [quicwg/base-drafts] handling of coalesced pa… Kazuho Oku
- Re: [quicwg/base-drafts] handling of coalesced pa… ianswett
- Re: [quicwg/base-drafts] handling of coalesced pa… Igor Lubashev
- Re: [quicwg/base-drafts] handling of coalesced pa… Martin Thomson
- Re: [quicwg/base-drafts] handling of coalesced pa… MikkelFJ
- Re: [quicwg/base-drafts] handling of coalesced pa… Martin Thomson
- Re: [quicwg/base-drafts] handling of coalesced pa… Igor Lubashev
- Re: [quicwg/base-drafts] handling of coalesced pa… ianswett
- Re: [quicwg/base-drafts] handling of coalesced pa… Martin Thomson
- Re: [quicwg/base-drafts] handling of coalesced pa… Kazuho Oku
- Re: [quicwg/base-drafts] handling of coalesced pa… MikkelFJ
- Re: [quicwg/base-drafts] handling of coalesced pa… Christian Huitema
- Re: [quicwg/base-drafts] handling of coalesced pa… MikkelFJ
- Re: [quicwg/base-drafts] handling of coalesced pa… Christian Huitema
- Re: [quicwg/base-drafts] handling of coalesced pa… MikkelFJ
- Re: [quicwg/base-drafts] handling of coalesced pa… Kazuho Oku
- Re: [quicwg/base-drafts] handling of coalesced pa… Christian Huitema
- Re: [quicwg/base-drafts] handling of coalesced pa… Kazuho Oku
- Re: [quicwg/base-drafts] handling of coalesced pa… Jana Iyengar
- Re: [quicwg/base-drafts] handling of coalesced pa… Kazuho Oku
- Re: [quicwg/base-drafts] handling of coalesced pa… Jana Iyengar
- Re: [quicwg/base-drafts] handling of coalesced pa… Christian Huitema
- Re: [quicwg/base-drafts] handling of coalesced pa… Kazuho Oku
- Re: [quicwg/base-drafts] handling of coalesced pa… MikkelFJ
- Re: [quicwg/base-drafts] handling of coalesced pa… Igor Lubashev
- Re: [quicwg/base-drafts] handling of coalesced pa… MikkelFJ
- Re: [quicwg/base-drafts] handling of coalesced pa… Lars Eggert
- Re: [quicwg/base-drafts] handling of coalesced pa… Eric Kinnear
- Re: [quicwg/base-drafts] handling of coalesced pa… Jana Iyengar