RE: Cookies Settings Observations
"Mike O'Neill" <[email protected]>
| Newsgroups | gmane.org.w3c.tag |
|---|---|
| Message-ID | <[email protected]> |
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Mike, It is often hard for UAs to tell first-party from third-party accesses. For example third-party blocking is being circumvented via redirection. Javascript changes the href of a same-origin anchor tag, e.g. a menu item, to point to a third-party origin with the original href as a query parameter. The third-party server responds with a 302 redirect back to the original href, along with a set-cookies header, when the menu item is clicked. The browser cannot tell it is “really” a third-party and the user may have no indication they were going to be redirected through the third-party. The first-party attribute would have to stop cookies being sent in these kind of redirected requests. Mike O’Neill From: Mike West [mailto:[email protected]] Sent: 28 January 2015 09:34 To: Yehuda Katz Cc: Daniel Appelquist; TAG List Subject: Re: Cookies Settings Observations On Mon, Jan 26, 2015 at 9:12 PM, Yehuda Katz <[email protected]> wrote: I recently asked around about why we don't have a CSP mechanism (or other opt in) to tell the browser that the cookies of a particular domain are "same origin only". Ah, cookies. What a mess. I took a stab at something like this in https://tools.ietf.org/html/draft-west-first-party-cookies-00. There seems to be vague interest in the HTTP WG, but I haven't gotten around to putting a prototype together yet. - -mike - -- Mike West <[email protected]>, @mikewest Google Germany GmbH, Dienerstrasse 12, 80331 München, Germany, Registergericht und -nummer: Hamburg, HRB 86891, Sitz der Gesellschaft: Hamburg, Geschäftsführer: Graham Law, Christine Elizabeth Flores (Sorry; I'm legally required to add this exciting detail to emails. Bleh.) -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.13 (MingW32) Comment: Using gpg4o v3.4.19.5391 - http://www.gpg4o.com/ Charset: utf-8 iQEcBAEBAgAGBQJUyOVVAAoJEHMxUy4uXm2J+AYIAKpEFW8wQA/RPXX3E8DBhCMl 0NtECXATmuHZG3qaHnY0v5cw1+yrOkNTVHjwCRHuDdVJCwOwWuTx+BTH2Zw8Yqmf 9QxgZF7d95OZnOswKT+db6aR8AH+oJ8fUSWzbkOTEPtyLmqk23Xk6wzomBlhvYGj 6s0LBIzI33MJLLi/J957OajQMrWzTp2BeWxT6W6DXW3womfPKEFmfeTcerBj7peU oL6eoAvK42jXpKeANwl2m7yt34ZpOW5NM7xXJK2RIleksm3elbU0XudA+Vm/6BaU mq3ny4vayrEAQ7geNHXD1gYAr8BY7ZroMFHHgxcFTqq9s6WxSFv5oX668fGxdb4= =Ykm7 -----END PGP SIGNATURE-----
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</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Mike, <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>It is often hard for UAs to tell first-party from third-party accesses. For example third-party blocking is being circumvented via redirection. Javascript changes the href of a same-origin anchor tag, e.g. a menu item, to point to a third-party origin with the original href as a query parameter. The third-party server responds with a 302 redirect back to the original href, along with a set-cookies header, when the menu item is clicked. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>The browser cannot tell it is “really” a third-party and the user may have no indication they were going to be redirected through the third-party.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>The first-party attribute would have to stop cookies being sent in these kind of redirected requests.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Mike O’Neill<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt'><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Mike West [mailto:[email protected]] <br><b>Sent:</b> 28 January 2015 09:34<br><b>To:</b> Yehuda Katz<br><b>Cc:</b> Daniel Appelquist; TAG List<br><b>Subject:</b> Re: Cookies Settings Observations<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><div><p class=MsoNormal>On Mon, Jan 26, 2015 at 9:12 PM, Yehuda Katz <<a href="mailto:[email protected]" target="_blank">[email protected]</a>> wrote:<o:p></o:p></p><p>I recently asked around about why we don't have a CSP mechanism (or other opt in) to tell the browser that the cookies of a particular domain are "same origin only".<o:p></o:p></p><div><p class=MsoNormal>Ah, cookies. What a mess.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I took a stab at something like this in <a href="https://tools.ietf.org/html/draft-west-first-party-cookies-00">https://tools.ietf.org/html/draft-west-first-party-cookies-00</a>. There seems to be vague interest in the HTTP WG, but I haven't gotten around to putting a prototype together yet.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>-mike<o:p></o:p></p></div><div><div><div><div><div><div><p class=MsoNormal style='background:white'><span style='font-family:"Arial","sans-serif";color:#222222'><br>--<br>Mike West <<a href="mailto:[email protected]" target="_blank"><span style='color:#1155CC'>[email protected]</span></a>>, </span><span style='font-size:9.5pt;font-family:"Arial","sans-serif";color:#222222'>@mikewest</span><span style='font-family:"Arial","sans-serif";color:#222222'><o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-family:"Arial","sans-serif";color:#222222'><o:p> </o:p></span></p><div><p class=MsoNormal style='background:white'><span style='font-family:"Arial","sans-serif";color:#222222'>Google Germany GmbH, Dienerstrasse 12, 80331 München, Germany, Registergericht und -nummer: Hamburg, HRB 86891, </span><span style='font-size:9.5pt;font-family:"Arial","sans-serif";color:#222222'>Sitz der Gesellschaft: Hamburg, Geschäftsführer: Graham Law, Christine Elizabeth Flores</span><span style='font-family:"Arial","sans-serif";color:#222222'><o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-family:"Arial","sans-serif";color:#222222'>(Sorry; I'm legally required to add this exciting detail to emails. Bleh.)<o:p></o:p></span></p></div></div></div></div></div></div></div></div><p class=MsoNormal><o:p> </o:p></p></div></div></div></div></body></html>
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