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[OAUTH-WG] Caution about open redirectors using the state parameter

Mike Jones <Michael.Jones@microsoft.com> Mon, 20 April 2020 21:28 UTC

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From: Mike Jones <Michael.Jones@microsoft.com>
To: "oauth@ietf.org" <oauth@ietf.org>
Thread-Topic: Caution about open redirectors using the state parameter
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Date: Mon, 20 Apr 2020 21:28:47 +0000
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Subject: [OAUTH-WG] Caution about open redirectors using the state parameter
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I've seen several circumstances where "clever" clients implement an open redirector by encoding a URL to redirect to in the state parameter value.  Attackers can then utilize this open redirector by choosing a state value.

Can we please add an explicit prohibition of this practice in draft-ietf-oauth-security-topics?

                                                       Thanks,
                                                       -- Mike

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