Stanko K.R.
1983014be6
The cookie approach seems like the more secure aproach because it ties the authentication or registration attempt to the user's browser session, but it doesn't work reliably on Chrome for Windows. Also, a simila problem pops up on Chrome for Linux if the session is used instead of a separate cookie. It looks like the browser doesn't propagate the state change through fast enough which results in some requests contaiining the new/updated cookie, and others don't, which results in sporadic failures. Since we use a signed and expiring challange we still get protection from replay attacks and tampering which enables us to omit the cookie entierly and rely on the challange's signature to prove expiration and authenticity. The only thing we lose is the ability to tie and attemp to a single browser session. See: https://github.com/w3c/webauthn/wiki/Explainer:-WebAuthn-challengeURL which proposes to add the same challange fetching logic as part of the standard See: https://github.com/w3c/webauthn/issues/1856 which discusses issues that arise from having expiring challanges (which the spec recommends) See: https://github.com/OneUptime/oneuptime/security/advisories/GHSA-gjjc-pcwp-c74m which is an explot that can happen if the server isn't able to verify the authenticity of challanges that are sent outside of a cookie
20 lines
648 B
Ruby
20 lines
648 B
Ruby
# = Action Pack WebAuthn Current Attributes
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#
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# Thread-isolated request-scoped attributes for WebAuthn ceremonies. These are
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# set automatically by ActionPack::Passkey::Request at the start of each
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# request and consumed by the registration/authentication flows.
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#
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# == Attributes
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#
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# [+host+]
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# The relying party identifier (typically +request.host+). Used as the
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# default RelyingParty ID.
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#
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# [+origin+]
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# The expected origin (typically +request.base_url+). Validated against the
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# +origin+ field in the authenticator's client data.
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#
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class ActionPack::WebAuthn::Current < ActiveSupport::CurrentAttributes
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attribute :host, :origin
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end
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