[OAUTH-WG] Re: [Technical Errata Reported] RFC9470 (7951)

[Tomasz Kuczyński <[e-mail]>]

It took some time since the last message in the thread. Could you please 
let me know if there is any additional information or action required 
from my side for the verification process? Or is it simply a matter of 
waiting for the process to complete?

Best regards
Tomasz Kuczyński

W dniu 30.05.2024 o 17:28, Brian Campbell pisze:
> I suspect a variety of not-entirely-improbable rational could be 
> provided to explain why it might make sense. But the reality is that 
> it's just a mistake in the document where somewhere along the way 
> updates were made to the examples that didn't fully align with content 
> already in those examples. I try to be careful with details like that 
> but apparently wasn't careful enough in this case.
>
> On Thu, May 23, 2024 at 5:45 AM Tomasz Kuczyński 
> <[e-mail]> wrote:
>
>     The introspection response should rather reflect facts related to
>     the access token sent for the introspection. So even in case, a
>     new authentication event took place after the token issuance, it
>     should not be included in the response as the authentication event
>     is not related to the introspected access token.
>     The inclusion of that information in the introspection response
>     should be treated as a vulnerability.
>
>     Regardless of the above, the "exp" in response is also earlier
>     than the "auth_time", which means that the introspected token is
>     beyond the time window of its validity and in fact, the
>     introspection response should contain nothing more than {"active":
>     false}.
>
>     Best regards
>     Tomasz Kuczyński
>
>     W dniu 23.05.2024 o 01:06, Justin Richer pisze:
>>     This seems to be logical - the authentication event would always
>>     be before the token was issued in the usual case. However,
>>     assuming that the AS "upgrades" an existing token in-place during
>>     a step up, isn't it possible for the latest relevant
>>     authentication event to come after the token was initially issued?
>>
>>      - Justin
>>     ------------------------------------------------------------------------
>>     *From:* RFC Errata System <[e-mail]>
>>     <mailto:[e-mail]>
>>     *Sent:* Wednesday, May 22, 2024 2:30 PM
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>>     [e-mail] <[e-mail]>
>>     <mailto:[e-mail]>; [e-mail]
>>     <[e-mail]> <mailto:[e-mail]>;
>>     [e-mail] <[e-mail]>
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>>     <[e-mail]> <mailto:[e-mail]>
>>     *Cc:* [e-mail]
>>     <[e-mail]>
>>     <mailto:[e-mail]>; [e-mail]
>>     <[e-mail]> <mailto:[e-mail]>;
>>     [e-mail] <[e-mail]>
>>     <mailto:[e-mail]>
>>     *Subject:* [OAUTH-WG] [Technical Errata Reported] RFC9470 (7951)
>>     The following errata report has been submitted for RFC9470,
>>     "OAuth 2.0 Step Up Authentication Challenge Protocol".
>>
>>     --------------------------------------
>>     You may review the report below and at:
>>     https://www.rfc-editor.org/errata/eid7951
>>
>>     --------------------------------------
>>     Type: Technical
>>     Reported by: Tomasz Kuczyński <[e-mail]>
>>     <mailto:[e-mail]>
>>
>>     Section: 6.2
>>
>>     Original Text
>>     -------------
>>          "exp": 1639528912,
>>          "iat": 1618354090,
>>          "auth_time": 1646340198,
>>
>>     Corrected Text
>>     --------------
>>          "exp": 1639528912,
>>          "iat": 1618354090,
>>          "auth_time": 1618354090,
>>
>>     Notes
>>     -----
>>     I noticed a small inconsistency in the example "Figure 7:
>>     Introspection Response". It seems that the time for the
>>     user-authentication event should be less than or equal to the
>>     time of token issuance to ensure logical coherence.
>>
>>     Instructions:
>>     -------------
>>     This erratum is currently posted as "Reported". (If it is spam, it
>>     will be removed shortly by the RFC Production Center.) Please
>>     use "Reply All" to discuss whether it should be verified or
>>     rejected. When a decision is reached, the verifying party
>>     will log in to change the status and edit the report, if necessary.
>>
>>     --------------------------------------
>>     RFC9470 (draft-ietf-oauth-step-up-authn-challenge-17)
>>     --------------------------------------
>>     Title               : OAuth 2.0 Step Up Authentication Challenge
>>     Protocol
>>     Publication Date    : September 2023
>>     Author(s)           : V. Bertocci, B. Campbell
>>     Category            : PROPOSED STANDARD
>>     Source              : Web Authorization Protocol
>>     Stream              : IETF
>>     Verifying Party     : IESG
>>
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