Re: bug in ssh allowing to be invisible

From: Kragen Sitaker (kragenat_private)
Date: Tue Apr 20 1999 - 13:19:05 PDT

  • Next message: Pete: "Re: bug in ssh allowing to be invissible"

    Greg writes:
    > This means that the potiential unprivialged user can use any account in
    > the system (hacked or so), and it's possible that root will not know what
    > is happening (or will know when it's too late ;-).
    
    There are dozens of ways you can run a process on a system you have
    shell access to without appearing in "finger" or "who".  Here are a
    few:
    command & logout
    procmail
    .forward
    .qmail*
    xterm -ut
    crontab
    
    This is not a security hole in ssh.  This is a security hole in the
    head of any Unix sysadmin who uses "finger" or "who" to see who's using
    their system.
    
    --
    <kragenat_private>       Kragen Sitaker     <http://www.pobox.com/~kragen/>
    This is exactly how the World Wide Web works: the HTML files are the pithy
    description on the paper tape, and your Web browser is Ronald Reagan.
      -- Neal Stephenson, at http://www.cryptonomicon.com/beginning_print.html
    



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