[Webkit-unassigned] [Bug 215201] New: Experimental: Cap the expiry of persistent cookies set in 3rd-party CNAME cloaked HTTP responses

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=215201

            Bug ID: 215201
           Summary: Experimental: Cap the expiry of persistent cookies set
                    in 3rd-party CNAME cloaked HTTP responses
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Misc.
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: wilander at apple.com

3rd-party CNAME cloaking is used as a way to circumvent ITP's 7-day expiry cap on client-side cookies. We should detect 3rd-party CNAME cloaking and cap the expiry of persistent cookies set in responses to requests cloaked in such a way.

Third-party CNAME cloaking means a first-party subdomain resolves to a third-party domain which does not match the resolution for the top frame host.

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