Re: [OAUTH-WG] Mix-Up Revisited

2020-06-18 Thread Brian Campbell
In my (probably simplistic) understanding of things, the root underlying issue that allows for mix-up in its variations is the lack of anything identifying the AS in the authorization response. Following from that, introducing and using an `iss` authorization response parameter has always seemed

Re: [OAUTH-WG] Mix-Up Revisited

2020-06-07 Thread Daniel Fett
Hi all, I was wondering if we should move towards introducing and (more explicitly) recommending the iss parameter in the security BCP, for the reasons laid out below and in the article (which is now at https://danielfett.de/2020/05/04/mix-up-revisited/). Any thoughts on this? -Daniel Am

[OAUTH-WG] Mix-Up Revisited

2020-05-04 Thread Daniel Fett
Hi all, to make substantiated recommendations for FAPI 2.0, the security considerations for PAR, and the security BCP, I did another analysis on the threats that arise from mix-up attacks. I was interested in particular in two questions: * Does PAR help preventing mix-up attacks? * Do we