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taviso's profile
Tavis Ormandy
Tavis Ormandy
Tavis Ormandy
Verified account
@taviso

Tweets

Tavis OrmandyVerified account

@taviso

Vulnerability researcher at Google. This is a personal stream, opinions expressed are mine.

California
taviso.decsystem.org
Joined April 2008

Tweets

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    1. Tavis Ormandy‏Verified account @taviso 3 Dec 2019
      • Report Tweet
      • Report NetzDG Violation

      Tavis Ormandy Retweeted API ERROR

      This turned out to be a real vulnerability! 😮 The certificate was issued by @digicert, who are now required to revoke it. It was issued before mandatory CT, so didn't show up in http://crt.sh . See https://twitter.com/sleevi_/status/1202046844240572416 … for context.https://twitter.com/SwiftOnSecurity/status/1202034106495832067 …

      Tavis Ormandy added,

      API ERROR @SwiftOnSecurity
      Me: Threat-hunting rare DNS lookups in a corporate network. Confluence: https://www.google.com/search?&q=%22atlassian-domain-for-localhost-connections-only.com%22 … pic.twitter.com/pse4VwORiZ
      Show this thread
      13 replies 256 retweets 731 likes
    2. ani betts‏ @anaisbetts 3 Dec 2019
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      Replying to @taviso @digicert

      We tried this at GitHub on the Desktop team for a Hot Minute, this is why this existed - it quickly proved unworkable though which was a real drag because that integration between the website and Desktop app would've been really Great

      4 replies 0 retweets 10 likes
      Tavis Ormandy‏Verified account @taviso 3 Dec 2019
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      Replying to @anaisbetts @digicert

      I think it should "just work" these days, localhost should now be considered a secure origin and no tricks should be necessary to avoid any mixed content or similar restrictions.

      6:40 PM - 3 Dec 2019
      • 16 Likes
      • Saurabh Shrivastava Topher Timzen q3st1on Matthew Pallotta @ Postponed Joas Kramer Chloride Cull 🏳️‍🌈 Jürgen Aumayr Ian Yates
      3 replies 0 retweets 16 likes
        1. New conversation
        2. ani betts‏ @anaisbetts 3 Dec 2019
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          Replying to @taviso @digicert

          In general it'd be nice if browsers would build communication with Native apps as an Explicitly Designed Feature, right now people use hacks like custom schemes and the result is just CVE after CVE

          3 replies 0 retweets 9 likes
        3. Tavis Ormandy‏Verified account @taviso 4 Dec 2019
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          Replying to @anaisbetts @digicert

          Maybe, that was basically NPAPI, but it became such a security problem we had to deprecate it. It's so hard to get this stuff right when you're exposing stuff to the untrusted web, and I don't know what the solution is. localhost RPC endpoints are the new NPAPI, results are... 😨

          1 reply 0 retweets 6 likes
        4. 1 more reply
        1. Liam Dawson‏ @liamdaws 4 Dec 2019
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          Replying to @taviso @anaisbetts @digicert

          I think 127.0.0.1 is considered secure, but localhost isn't (because it _could_ point to a different IP)?

          0 replies 0 retweets 0 likes
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        1. Peleg Wasserman  🏴‍☠️‏ @CyberGhost_il 5 Dec 2019
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          Replying to @taviso @anaisbetts @digicert

          I can see cases where this may lead to a security compromise, so not sure how great it would be out of the box. Why not just generate and add a trusted cert on install?

          0 replies 0 retweets 0 likes
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