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Re: [Sidrops] Reason for Outage report (was: Re: ARIN RPKI Service Impact - 12 August 2020 - manifest issue - resolved)

Randy Bush <randy@psg.com> Fri, 28 August 2020 12:00 UTC

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Date: Fri, 28 Aug 2020 05:00:34 -0700
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From: Randy Bush <randy@psg.com>
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Subject: Re: [Sidrops] Reason for Outage report (was: Re: ARIN RPKI Service Impact - 12 August 2020 - manifest issue - resolved)
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excuse, but a bit pre caffeine here

> I believe that, if the publication point for a Certification Authority
> in the RPKI is rejected for whatever reason, then all VRPS for
> prefixes overlapping the resources issued to them in their CA
> certificate for said publication point should be filtered out.

complexity and cleverness produce fragility.

first, you may not know the prefix from the failed pp; it failed.
second, getting you to think that you do could be a nice attack.

> It is important to only do this for VALID CA certificates with invalid
> publication points.

i am not sure what an invalid pp is.  one where none of the referring
object(s) are cryptographically validatable to a TA?

> if one would start doing this for invalid over-claiming CA
> certificates then this would of course open a wide vector for people
> to DoS legitimate statements about other people's address space.

good reasone not to do it at all.

randy

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