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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. Scott Helme‏Verified account @Scott_Helme 20 Mar 2019
      • Report Tweet
      • Report NetzDG Violation

      Yesterday I was pointed to a directory on a website that appeared to contain certificates and private keys for the Safe Deposit Bank of Norway.pic.twitter.com/6wixbRHA6c

      7 replies 63 retweets 201 likes
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    2. Scott Helme‏Verified account @Scott_Helme 20 Mar 2019
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      The folder did indeed contain their EV certificate and the associated private key. https://pastebin.com/Uv6mrNSt pic.twitter.com/WAIgHgAVnl

      1 reply 2 retweets 35 likes
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    3. Scott Helme‏Verified account @Scott_Helme 20 Mar 2019
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      Of course the immediate course of action was to notify the site and they only had one email address available online to do that.pic.twitter.com/bummqhCYxC

      3 replies 3 retweets 38 likes
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    4. Scott Helme‏Verified account @Scott_Helme 20 Mar 2019
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      I still haven't received any response from the site but I also notified @digicert, who were the issuing CA. They most likely have a point of contact at the organisation in question and also need to revoke the cert now the key is compromised.pic.twitter.com/W5Z7vM71fy

      2 replies 2 retweets 30 likes
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    5. Scott Helme‏Verified account @Scott_Helme 20 Mar 2019
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      DigiCert were quick to respond and followed up asking for more information.pic.twitter.com/7mxQoKf4EO

      3 replies 3 retweets 31 likes
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    6. hanno‏ @hanno 20 Mar 2019
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      Replying to @Scott_Helme

      would be good to share the incident on mozilla-dev-security-policy

      2 replies 0 retweets 0 likes
    7. Will Dormann‏ @wdormann 20 Mar 2019
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      Replying to @hanno @Scott_Helme

      I have about 100 different private keys that were released to the public in Android apps and were also used to obtain at least 1 certificate from a CA participating in the CT project. Would it be appropriate to contact each of the respective CAs to have the certificates revoked?

      1 reply 0 retweets 2 likes
    8. hanno‏ @hanno 20 Mar 2019
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      Replying to @wdormann @Scott_Helme

      yes, absolutely. Please do. And send a report to the mozilla list. (Also "participating in the CT project" is these days practically every CA in the Web PKI - otherwise Chrome won't like your certs)

      1 reply 0 retweets 3 likes
    9. Will Dormann‏ @wdormann 20 Mar 2019
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      Replying to @hanno @Scott_Helme

      Before I reinvent any wheels, are there already any tools that can help automate the reporting of compromised keys to respective CAs? That is, given a key present in either https://crt.sh/?q=  (certificate hash) https://crt.sh/?spkisha256=  (key hash) show the proper contact info.

      3 replies 0 retweets 1 like
    10. Eli Grey‏ @sephr 21 Mar 2019
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      Replying to @wdormann @hanno @Scott_Helme

      Dump them on Twitter and tag the respective CAs. The certs are already compromised. Public disclosure would surely be the fastest way to get them revoked.

      1 reply 0 retweets 1 like
      Will Dormann‏ @wdormann 21 Mar 2019
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      Replying to @sephr @hanno @Scott_Helme

      This would still require a mapping from CA to twitter handle. I currently have a list of 38 different CAs that need to be contacted in some way.

      1:49 PM - 21 Mar 2019
      1 reply 0 retweets 0 likes
        1. New conversation
        2. Eli Grey‏ @sephr 21 Mar 2019
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          Replying to @wdormann @hanno @Scott_Helme

          Ah, ok. I guess you can use Twitter for CAs that you can find on Twitter, and mozilla-dev-security-policy for the rest. There should definitely be more standardization regarding key revocation.

          1 reply 0 retweets 1 like
        3. Will Dormann‏ @wdormann 21 Mar 2019
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          Replying to @sephr @hanno @Scott_Helme

          Right. Given a pile of about 100 compromised keys that were issued by 38 different CAs, how would you automate the revocation process? Automation being important so as to be scalable. e.g. what if it were 1000 CAs?

          2 replies 2 retweets 1 like
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