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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. Nate Warfield‏ @n0x08 Jan 15
      • Report Tweet
      • Report NetzDG Violation

      Nate Warfield Retweeted MalwareTech

      It's only a matter of time; find & patch your RD Gateway systems ASAP. All the @shodanhq dorks I have to find them are below. https://beta.shodan.io/search?query=http.html%3AtdDomainUserNameLabel … https://beta.shodan.io/search?query=RDWeb … https://beta.shodan.io/search?query=TSWAFeatureCheckCookie … https://beta.shodan.io/search?query=path%3D%2FRDWeb%2F …https://twitter.com/MalwareTechBlog/status/1217433253096779776 …

      Nate Warfield added,

      0:07
      MalwareTechVerified account @MalwareTechBlog
      Got a crash PoC working for one of the Remote Desktop Gateway bugs. Will probably do a write up tomorrow. pic.twitter.com/SmH2L3gVxn
      Show this thread
      1 reply 17 retweets 41 likes
    2. Will Dormann‏ @wdormann Jan 15
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      Replying to @n0x08 @shodanhq

      RD Gateway and RD Web Access are separate features, though, aren't they? If so, then a hit for RDWeb might give a result for a machine that doesn't necessarily have RD Gateway?

      1 reply 0 retweets 2 likes
    3. Nate Warfield‏ @n0x08 Jan 15
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      Replying to @wdormann @shodanhq

      Correct; detections aren't 100% since RD Gateway runs on UDP/3391 and neither @shodanhq nor @binaryedgeio scan for that port. RDWeb is commonly running on RD Gateway servers so this is the best detection I could come up with.

      2 replies 0 retweets 3 likes
      Will Dormann‏ @wdormann Jan 15
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      Replying to @n0x08 @shodanhq @binaryedgeio

      The vulnerability can still be triggered via TCP/443 though, right? That is, even though it's also listening on UDP/3391, that may not matter? I would assume that the latter is usually firewalled off anyway.

      10:10 AM - 15 Jan 2020
      2 replies 0 retweets 0 likes
        1. New conversation
        2. Nate Warfield‏ @n0x08 Jan 16
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          Replying to @wdormann @shodanhq @binaryedgeio

          We've updated the CVE details for CVEs ending in 0609, 0610 and 0612 to include the network port details. Only UDP/3391 is vulnerable, TCP/443 is not nor is TCP/3389. https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2020-0609 … https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2020-0610 … https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2020-0612 …

          2 replies 5 retweets 13 likes
        3. Vijay Sarvepalli‏ @vijaycert Jan 16
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          Replying to @n0x08 @wdormann and

          Jus curious - How about RDS service? Seeing escalated 443 RPC over HTTPS scans since Tuesday e.g[Thu Jan 16 17:26:38.072296 2020] [core:error] [pid 7199] [client X.X.163.205:41846] AH00135: Invalid method in request RPC_IN_DATA /rpc/rpcproxy.dll?localhost:3388 HTTP/1.1

          1 reply 0 retweets 0 likes
        4. 4 more replies
        1. New conversation
        2. Nate Warfield‏ @n0x08 Jan 15
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          Replying to @wdormann @shodanhq @binaryedgeio

          I'm not at liberty to disclose that level of detail, sorry!

          1 reply 0 retweets 0 likes
        3. Art Manion‏ @zmanion Jan 15
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          Replying to @n0x08 @wdormann and

          Seems like such knowledge would help defenders understand their exposure, and not give attackers any/much net benefit.

          0 replies 0 retweets 1 like
        4. End of conversation

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