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arturjanc's profile
Artur Janc
Artur Janc
Artur Janc
@arturjanc

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Artur Janc

@arturjanc

Making the web platform more secure one Twitter flamewar at a time.

Zurich, Switzerland
Joined February 2012

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    1. Georgios Kontaxis‏ @k0ntax1s Apr 6

      Georgios Kontaxis Retweeted Steven Bellovin

      @johnwilander Cookies over an insecure transport are pretty scary. Think Firesheep.https://twitter.com/SteveBellovin/status/982273037373341696 …

      Georgios Kontaxis added,

      Steven BellovinVerified account @SteveBellovin
      Replying to @mikewest @ivanristic
      Yes. See, e.g., https://www.cs.columbia.edu/~suphannee/papers/sivakorn.sp2016.cookiehijack.pdf …
      1 reply 0 retweets 2 likes
    2. John Wilander‏ @johnwilander Apr 6
      Replying to @k0ntax1s

      I haven’t seen or heard of a significant auth cookie being insecure in years. Secure tracking cookies, however, they’re all over the place.

      1 reply 0 retweets 1 like
    3. Georgios Kontaxis‏ @k0ntax1s Apr 6
      Replying to @johnwilander

      https://www.cs.columbia.edu/~suphannee/papers/sivakorn.sp2016.cookiehijack.pdf … is from 2016 and has interesting findings. Google, Amazon, Target, NYT, and others expose browsing / purchase history, PII by sending cookies over plain HTTP.

      1 reply 0 retweets 0 likes
    4. John Wilander‏ @johnwilander Apr 6
      Replying to @k0ntax1s

      Published in 2016. Research from 2014-2015? Screenshots show http://www.google.com  loaded over http and I can’t recall when that was still a thing.

      2 replies 0 retweets 0 likes
    5. Georgios Kontaxis‏ @k0ntax1s Apr 6
      Replying to @johnwilander

      I believe HSTS for http://google.com  is still NOT preloaded in Chrome. Someone strips the redirect, you can connect over plain text just fine. Paper highlights the issue. Unless there’s recent evidence that insecure cookies aren’t sensitive, I would still worry about it.

      2 replies 0 retweets 0 likes
    6. John Wilander‏ @johnwilander Apr 6
      Replying to @k0ntax1s

      Are you saying some http://google.com  cookies are not marked Secure? If so, @mikewest’s proposal will kill them.

      2 replies 0 retweets 0 likes
    7. Mike West‏ @mikewest Apr 6
      Replying to @johnwilander @k0ntax1s

      Google certainly has non-secure cookies. This proposal will encourage us to have fewer of them, and to ensure that those that remain can't be used against users by network attackers. If we can get rid of them altogether, so much the better.

      1 reply 1 retweet 0 likes
      Artur Janc‏ @arturjanc Apr 7
      Replying to @mikewest @johnwilander @k0ntax1s

      Yes, but generally not for authn - you should not be able to get sensitive data with just the SID (which is not set as Secure, unlike its HSID+SSID sister cookies). If this is not the case, it's likely a bug, and we'd love to hear about it via the VRP: http://goo.gl/vulnz 

      1:19 AM - 7 Apr 2018
      • 1 Like
      • mik
      2 replies 0 retweets 1 like
        1. Georgios Kontaxis‏ @k0ntax1s Apr 7
          Replying to @arturjanc

          @ssivakorn has written her findings about insecure Google (and other) cookies in https://www.cs.columbia.edu/~suphannee/papers/sivakorn.sp2016.cookiehijack.pdf … and it seems sensitive data is exposed. (Table II, Fig 3, Table VI) You two should talk.

          0 replies 0 retweets 0 likes
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        1. Mike West‏ @mikewest Apr 7
          Replying to @arturjanc @johnwilander @k0ntax1s

          (Google has lots of non-auth non-secure cookies though. It would not at all shock me to learn that some of them are valuable.)

          0 replies 1 retweet 1 like
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