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wycats's profile
Yehuda Katz 🥨
Yehuda Katz 🥨
Yehuda Katz  🥨
Verified account
@wycats

Tweets

Yehuda Katz  🥨Verified account

@wycats

Tilde Co-Founder, OSS enthusiast and world traveler.

Portland, OR
yehudakatz.com
Joined August 2007

Tweets

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    Yehuda Katz  🥨‏Verified account @wycats 6 Aug 2015

    If your app is not behind an intranet, it's always safe to CORS everything w/ Access-Control-Allow-Origin: * https://fetch.spec.whatwg.org/#basic-safe-cors-protocol-setup … - do it

    10:10 AM - 6 Aug 2015
    • 58 Retweets
    • 106 Likes
    • Rohit Gupta Maik Kempe Bitaculous Jamie Reilly 👾 Jason Morganson Paul Khuong Adolfo Builes Jonathan A Rees
    7 replies 58 retweets 106 likes
      1. New conversation
      2. keith•j•grant‏ @keithjgrant 6 Aug 2015
        Replying to @wycats

        @wycats @WHATWG Note that legal issues may be different than security concerns. In particular, web fonts & license restrictions.

        3 replies 0 retweets 4 likes
      3. Yehuda Katz  🥨‏Verified account @wycats 6 Aug 2015
        Replying to @keithjgrant

        @keithjgrant @WHATWG are you saying that web fonts disallow the addition of CORS headers?

        1 reply 0 retweets 0 likes
      4. keith•j•grant‏ @keithjgrant 6 Aug 2015
        Replying to @wycats

        @wycats @WHATWG Font license agreement states we restrict access only to our own domains. (sadly, dealing w/ this very thing right now)

        1 reply 0 retweets 0 likes
      5. Yehuda Katz  🥨‏Verified account @wycats 6 Aug 2015
        Replying to @keithjgrant

        @keithjgrant @WHATWG the font foundries have gamed the system and fucked the simple CORS advice. Time to fix.

        0 replies 0 retweets 2 likes
      6. End of conversation
      1. New conversation
      2. Aaron Patterson‏Verified account @tenderlove 6 Aug 2015
        Replying to @wycats

        @wycats of CORS it’s safe!

        1 reply 4 retweets 30 likes
      3. 1 more reply
      1. New conversation
      2. François REMY‏ @FremyCompany 6 Aug 2015
        Replying to @wycats

        @wycats but not always sufficient. if you plan to use cookies, you have to reply "ACAO: <request.headers.Origin>" in addition to allow-creds

        1 reply 0 retweets 3 likes
      3. Nathan Davison‏ @ndav85 7 Aug 2015
        Replying to @FremyCompany

        @FremyCompany @wycats Which is not always a great idea, e.g. if the resource generates CSRF or similar tokens.

        1 reply 0 retweets 0 likes
      4. François REMY‏ @FremyCompany 7 Aug 2015
        Replying to @ndav85

        @ndav85 @wycats True. In the case I had in mind, the origin was checked using a white list.

        0 replies 0 retweets 0 likes
      5. End of conversation
      1. Devdatta Akhawe‏ @frgx 8 Aug 2015
        Replying to @wycats

        @wycats Thanks for the link! The num of times I have to keep repeating this explanation to devs is very high .. nice to have a link

        0 replies 0 retweets 0 likes
        Thanks. Twitter will use this to make your timeline better. Undo
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      1. Forbes Lindesay‏ @ForbesLindesay 7 Aug 2015
        Replying to @wycats

        @wycats @domenic you also have to not be blindly trusting of cookies

        0 replies 0 retweets 0 likes
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      1. Eric Lawrence  🎻‏ @ericlaw 6 Aug 2015
        Replying to @wycats

        @wycats IPSEC?

        0 replies 0 retweets 0 likes
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      1. New conversation
      2. Charles Engelke‏ @charlesengelke 6 Aug 2015
        Replying to @wycats

        @wycats @annevk Am I missing something? What about "for credentialed HTTP requests it needs to be opt-in to prevent" sensitive data leakage?

        1 reply 0 retweets 0 likes
      3. Anne van Kesteren‏ @annevk 6 Aug 2015
        Replying to @charlesengelke

        @charlesengelke @wycats a request that includes credentials would not pass the CORS check for this type of response header.

        1 reply 0 retweets 0 likes
      4. Charles Engelke‏ @charlesengelke 6 Aug 2015
        Replying to @annevk

        @annevk @wycats Thanks for clearing that up for me.

        0 replies 0 retweets 0 likes
      5. End of conversation

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