Re: [OAUTH-WG] I'm concerned about how the sniffability of oauth2 requests
Sergey Beryozkin <sberyozkin@gmail.com> Wed, 06 February 2013 21:48 UTC
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Date: Wed, 06 Feb 2013 21:48:31 +0000
From: Sergey Beryozkin <sberyozkin@gmail.com>
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Subject: Re: [OAUTH-WG] I'm concerned about how the sniffability of oauth2 requests
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On 06/02/13 17:56, William Mills wrote: > Yes, MAC relies on SSL for transport security. But you have bigger > problems than that if SSL is broken, because your primary authentication > credential is compromised now. > +1 > Do we need to address sslstrip here if it's a general attack on SSL > transport for the browser? When MAC is passed back to the client requesting a token in exchange for a grant, no browser is even involved, right ? Besides, one can exchange MAC token over two-way TLS in order to authenticate and I guess it is much much trickier to have a man in the middle attack with two-way TLS Cheers, Sergey > > ------------------------------------------------------------------------ > *From:* Prabath Siriwardena <prabath@wso2.com> > *To:* William Mills <wmills_92105@yahoo.com> > *Cc:* L. Preston Sego III <LPSego3@gmail.com>; "oauth@ietf.org" > <oauth@ietf.org> > *Sent:* Wednesday, February 6, 2013 8:23 AM > *Subject:* Re: [OAUTH-WG] I'm concerned about how the sniffability of > oauth2 requests > > > > On Mon, Feb 4, 2013 at 9:57 PM, William Mills <wmills_92105@yahoo.com > <mailto:wmills_92105@yahoo.com>> wrote: > > There are two efforts at signed token types: MAC which is still a > possibility if we wake up and do it, and the "Holder Of Key" type > tokens. > > > If someone can use sslstrip then even MAC is not safe - since MAC key > needs to be transferred over SSL to the Client from the AS. > > There are standard ways in HTTP to avoid or protect from sslstrip - IMHO > we need to occupy those best practices... > > Thanks & regards, > -Prabath > > > There are a lot of folks that agree with you. > > ------------------------------------------------------------------------ > *From:* L. Preston Sego III <LPSego3@gmail.com > <mailto:LPSego3@gmail.com>> > *To:* oauth@ietf.org <mailto:oauth@ietf.org> > *Sent:* Friday, February 1, 2013 7:37 AM > *Subject:* [OAUTH-WG] I'm concerned about how the sniffability of > oauth2 requests > > In an oauth2 request, the access token is passed along in the > header, with nothing else. > > As I understand it, oauth2 was designed to be simple for everyone to > use. And while, that's true, I don't really like how all of the > security is reliant on SSL. > > what if an attack can strip away SSL using a tool such as sslstrip > (or whatever else would be more suitable for modern https)? They > would be able to see the access token and start forging whatever > request he or she wants to. > > Why not do some sort of RSA-type public-private key thing like back > in Oauth1, where there is verification of the payload on each > request? Just use a better algorithm? > > _______________________________________________ > OAuth mailing list > OAuth@ietf.org <mailto:OAuth@ietf.org> > https://www.ietf.org/mailman/listinfo/oauth > > > > _______________________________________________ > OAuth mailing list > OAuth@ietf.org <mailto:OAuth@ietf.org> > https://www.ietf.org/mailman/listinfo/oauth > > > > > -- > Thanks & Regards, > Prabath > > Mobile : +94 71 809 6732 > > http://blog.facilelogin.com > http://RampartFAQ.com > > > > > _______________________________________________ > OAuth mailing list > OAuth@ietf.org > https://www.ietf.org/mailman/listinfo/oauth
- [OAUTH-WG] I'm concerned about how the sniffabili… L. Preston Sego III
- Re: [OAUTH-WG] I'm concerned about how the sniffa… William Mills
- Re: [OAUTH-WG] I'm concerned about how the sniffa… Prateek Mishra
- Re: [OAUTH-WG] I'm concerned about how the sniffa… Sergey Beryozkin
- Re: [OAUTH-WG] I'm concerned about how the sniffa… Lewis Adam-CAL022
- Re: [OAUTH-WG] I'm concerned about how the sniffa… Hannes Tschofenig
- Re: [OAUTH-WG] I'm concerned about how the sniffa… Prabath Siriwardena
- Re: [OAUTH-WG] I'm concerned about how the sniffa… William Mills
- Re: [OAUTH-WG] I'm concerned about how the sniffa… Prabath Siriwardena
- Re: [OAUTH-WG] I'm concerned about how the sniffa… Sergey Beryozkin