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    Thomas 🔭🕹️ (thomasfuchs@hachyderm.io)'s status on Wednesday, 21-Jan-2026 09:54:58 JST Thomas 🔭🕹️ Thomas 🔭🕹️

    RE: https://cyberplace.social/@GossiTheDog/115929393014353710

    this is great for when you forget your password!

    In conversation about 6 days ago from hachyderm.io permalink

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    1. No result found on File_thumbnail lookup.
      Kevin Beaumont (@GossiTheDog@cyberplace.social)
      from Kevin Beaumont
      lol https://seclists.org/oss-sec/2026/q1/89 telnetd server invokes /usr/bin/login (normally running as root) passing the value of the USER environment variable received from the client as the last parameter. If the client supply a carefully crafted USER environment value being the string "-f root", and passes the telnet(1) -a or --login parameter to send this USER environment to the server, the client will be automatically logged in as root bypassing normal authentication processes In telnetd for a decade 💀

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