[Openid-specs-ab] Defining a Hardened (Mix-up and Cut-and-Paste Proof) OpenID Connect Profile

Torsten Lodderstedt torsten at lodderstedt.net
Wed Apr 27 17:23:54 UTC 2016


*** Sorry. I did it again. ***

Hi William,

may interested parties at remote locations contribute as well?

best regards,
Torsten.

PS: where had the OIDF workshop been announced? I don't remember a 
posting on this list.

Am 27.04.2016 um 19:22 schrieb Torsten Lodderstedt:
>
> Hi Denniss,
>
> may interested parties at remote locations contribute as well?
>
> best regards,
> Torsten.
>
> PS: where had the OIDF workshop been announced? I don't remember a 
> posting on this list.
>
> Am 25.04.2016 um 23:53 schrieb William Denniss:
>> We discussed this topic at the OIDF workshop today. The consensus was 
>> that we should publish a formal-ish (board reviewed) blog post / 
>> bulletin with implementation advice on how to mitigate Mix-up and 
>> Cut-and-Paste in Connect.
>>
>> Interested parties can meet tomorrow at IIW to draft this text.
>>
>> On Sat, Apr 23, 2016 at 7:57 AM, John Bradley <ve7jtb at ve7jtb.com 
>> <mailto:ve7jtb at ve7jtb.com>> wrote:
>>
>>     I think there are two discussions.
>>
>>     One is what the OAuth WG should do and that should be on the
>>     OAuth list.
>>
>>     There is a separate discussion about what Connect should
>>     recommend untill OAuth addresses the issue.
>>
>>     I think the latter was how this thread started.
>>
>>     We not be should not wait for OAuth to recommend something before
>>     we explain the existing mitigations in Connect.
>>
>>     The touchier topic is should we add anything new before OAuth
>>     decides.
>>
>>     To Brian's point about the AS not identifying itself in the
>>     response,  that was the recommended change from the Darmstadt
>>     meeting.   I am however hesitant to take that up as a Connect
>>     only fix even though it would work just fine for Connect.
>>
>>     John B.
>>
>>     On Apr 23, 2016 9:04 AM, "Brian Campbell"
>>     <bcampbell at pingidentity.com <mailto:bcampbell at pingidentity.com>>
>>     wrote:
>>
>>         Just noticed a typo in my previous message. I meant to write
>>         "omission" rather than "commission" there. Should have said:
>>
>>         My view is still that the attack is enabled by an *omission*
>>         in OAuth of the AS identifying itself in the authorization
>>         response. I think the fix should be at that layer too.
>>         Progress in the OAuth WG isn't exactly promising though...
>>
>>         On Sat, Apr 23, 2016 at 5:36 AM, Torsten Lodderstedt
>>         <torsten at lodderstedt.net> wrote:
>>
>>             Am 15.04.2016 um 19:05 schrieb Brian Campbell:
>>
>>                 My view is still that the attack is enabled by an
>>                 commission in OAuth of the AS identifying itself in
>>                 the authorization response. I think the fix should be
>>                 at that layer too. Progress in the OAuth WG isn't
>>                 exactly promising though...
>>
>>             Why don`t we bring this discussion to the OAuth WG? It`s
>>             nearly the same group of people as on this list.
>>
>>
>>
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>>
>>
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