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wdormann's profile
Will Dormann
Will Dormann
Will Dormann
@wdormann

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Will Dormann

@wdormann

Vulnerability Analyst at the CERT/CC. My thoughts are my own, not my employer's.

Joined August 2012

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    1. SwiftOnSecurity‏ @SwiftOnSecurity 3 Dec 2019
      • Report Tweet
      • Report NetzDG Violation

      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

      35 replies 343 retweets 1,622 likes
      Show this thread
    2. Tavis Ormandy‏Verified account @taviso 3 Dec 2019
      • Report Tweet
      • Report NetzDG Violation
      Replying to @SwiftOnSecurity

      Did you know you just dropped a 0day on twitter? 😂

      10 replies 216 retweets 1,520 likes
    3. SwiftOnSecurity‏ @SwiftOnSecurity 3 Dec 2019
      • Report Tweet
      • Report NetzDG Violation
      Replying to @taviso

      Wait... are you serious? They... actually embed the private cert somewhere? I was just laughing at the domain name.

      9 replies 33 retweets 601 likes
    4. Tavis Ormandy‏Verified account @taviso 3 Dec 2019
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      Replying to @SwiftOnSecurity

      Yes, it happens sometimes, as soon as someone pulls out the key the CA is required to revoke it. They probably did it to avoid mixed-content warnings, as you can probably guess... it's not the correct solution. Anyone using this app is vulnerable to trivial MITM 😣

      7 replies 11 retweets 268 likes
    5. Eric Lawrence  🎻‏ @ericlaw 3 Dec 2019
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      Replying to @taviso @SwiftOnSecurity

      Interestingly, that host doesn't show up in http://crt.sh , so they didn't do the most convenient common bad thing.

      3 replies 1 retweet 57 likes
    6. Tavis Ormandy‏Verified account @taviso 3 Dec 2019
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      Replying to @ericlaw @SwiftOnSecurity

      I pulled out the certificates here, they do seem valid at first glance, not sure why they didn't get logged in CT. 😆https://pastebin.com/F8UD8Ypb 

      3 replies 1 retweet 121 likes
    7. SwiftOnSecurity‏ @SwiftOnSecurity 3 Dec 2019
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      Replying to @taviso @ericlaw

      😰

      1 reply 0 retweets 81 likes
    8. Tavis Ormandy‏Verified account @taviso 3 Dec 2019
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      Replying to @SwiftOnSecurity @ericlaw

      It seems like Atlassian are a CVE CNA, you can ask them to assign a CVE if you like! (seriously, this is a real vulnerability) https://cve.mitre.org/cve/request_id.html#a …

      4 replies 9 retweets 157 likes
      Will Dormann‏ @wdormann 4 Dec 2019
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      • Report NetzDG Violation
      Replying to @taviso @SwiftOnSecurity @ericlaw

      Any time a stock web browser connects to localhost using HTTPS and doesn't complain about an invalid certificate, your vulnerability spidey senses should be tingling.pic.twitter.com/A04AGNwQSo

      8:05 AM - 4 Dec 2019
      • 1 Retweet
      • 7 Likes
      • Alex Butcher Saurabh Shrivastava hotel desk bell Royce Williams ᐸsvg/onload=alert(🇭🇹🇳🇱)ᐳ Aaron Sanderson Tavis Ormandy Mitja Kolsek
      1 reply 1 retweet 7 likes
        1. New conversation
        2. Will Dormann‏ @wdormann 4 Dec 2019
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          Replying to @wdormann @taviso and

          Note that Microsoft Edge is apparently quite speedy at picking up that the certificate has been revoked. Google Chrome seems to be fine with it at the moment.pic.twitter.com/5G6vw9zvdo

          2 replies 2 retweets 5 likes
        3. Will Dormann‏ @wdormann 4 Dec 2019
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          Replying to @wdormann @taviso and

          Also note that this private key isn't too terribly tricky to find. A simple grep in the installed software directory would suffice.pic.twitter.com/iTqtU6EYgb

          1 reply 2 retweets 6 likes
        4. 1 more reply

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