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Re: should I firewall an open port which isn't used? (was ... Re: Guide(s?) to backup philosophies)

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>Well, not without getting root first.
>
>And making something listen that spawns a shell usable to gain further
>access is a big win. Keeping uploading PHP code to some vulnerable
>webserver will at some point be noticed. Uploading something spawning a
>shell once probably not.
>

When $someone hacked $somebigamericanwebhoster some years ago, $they first found a CMS that allowed online editing of its PHP code. $they were able to use that to run arbitrary shell commands. However, that thing had an edit history, so keeping passing in new code produced a well-visible log each time (in retrospective, $they could just have patched that away, but well...).

Uploading and starting ajaxterm, however, cost $them only two edits, and as it went listening on its own port without a firewall logging, $they had an interactive shell that could be configured to keep no record of anything.

(Not of any interest here, but $they then found a misconfigured NFS share that mapped all UIDs to root, keeping suid bits... use your imagination for the rest. But $they would not have found that without an interactive shell.)

-nik

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Guide(s?) to backup philosophies Richard Owlett <rowlett@cloud85.net> - 2017-03-11 16:20 +0100
  Re: Guide(s?) to backup philosophies David Christensen <dpchrist@holgerdanske.com> - 2017-03-11 22:10 +0100
    Re: Guide(s?) to backup philosophies Dan Purgert <dan@djph.net> - 2017-03-13 14:00 +0100
      Re: Guide(s?) to backup philosophies David Christensen <dpchrist@holgerdanske.com> - 2017-03-14 05:00 +0100
        Re: Guide(s?) to backup philosophies Dan Purgert <dan@djph.net> - 2017-03-17 11:50 +0100
          Re: Guide(s?) to backup philosophies Glenn English <ghe2001@gmail.com> - 2017-03-17 19:50 +0100
          Re: Guide(s?) to backup philosophies David Christensen <dpchrist@holgerdanske.com> - 2017-03-18 06:20 +0100
            Re: Guide(s?) to backup philosophies Dan Purgert <dan@djph.net> - 2017-03-22 11:50 +0100
              Re: Guide(s?) to backup philosophies <tomas@tuxteam.de> - 2017-03-22 11:50 +0100
                Re: Guide(s?) to backup philosophies Dan Purgert <dan@djph.net> - 2017-03-22 13:20 +0100
                Re: Guide(s?) to backup philosophies <tomas@tuxteam.de> - 2017-03-22 13:30 +0100
                Re: Guide(s?) to backup philosophies Dan Purgert <dan@djph.net> - 2017-03-23 10:30 +0100
                Re: Guide(s?) to backup philosophies <tomas@tuxteam.de> - 2017-03-23 11:10 +0100
                Re: Guide(s?) to backup philosophies Dan Purgert <dan@djph.net> - 2017-03-23 13:10 +0100
              Re: Guide(s?) to backup philosophies David Christensen <dpchrist@holgerdanske.com> - 2017-03-23 04:00 +0100
                Re: Guide(s?) to backup philosophies Dan Purgert <dan@djph.net> - 2017-03-23 10:40 +0100
                Re: Guide(s?) to backup philosophies David Christensen <dpchrist@holgerdanske.com> - 2017-03-23 20:10 +0100
        Re: should I firewall an open port which isn't used? (was ... Re: Guide(s?) to backup philosophies) Dominik George <nik@naturalnet.de> - 2017-03-31 14:10 +0200
          Re: should I firewall an open port which isn't used? (was ... Re:  Guide(s?) to backup philosophies) Dominik George <nik@naturalnet.de> - 2017-03-31 23:20 +0200
          Re: should I firewall an open port which isn't used? (was ... Re:  Guide(s?) to backup philosophies) Nathan Dorfman <ndorf@rtfm.net> - 2017-04-01 11:00 +0200
        should I firewall an open port which isn't used? (was ... Re:  Guide(s?) to backup philosophies) cbannister@slingshot.co.nz - 2017-03-31 14:10 +0200
          Re: should I firewall an open port which isn't used? (was ... Re:  Guide(s?) to backup philosophies) <tomas@tuxteam.de> - 2017-03-31 14:20 +0200
            Re: should I firewall an open port which isn't used? (was ... Re:  Guide(s?) to backup philosophies) Brian <ad44@cityscape.co.uk> - 2017-03-31 15:20 +0200
              Re: should I firewall an open port which isn't used? (was ... Re:  Guide(s?) to backup philosophies) <tomas@tuxteam.de> - 2017-03-31 15:30 +0200
              Re: should I firewall an open port which isn't used? (was ... Re: Guide(s?) to backup philosophies) Dominik George <nik@naturalnet.de> - 2017-03-31 15:30 +0200
                Re: should I firewall an open port which isn't used? (was ... Re: Guide(s?) to backup philosophies) Dominik George <nik@naturalnet.de> - 2017-03-31 15:50 +0200
      Re: Guide(s?) to backup philosophies Glenn English <ghe2001@gmail.com> - 2017-03-14 19:00 +0100
        Re: Guide(s?) to backup philosophies Dan Ritter <dsr@randomstring.org> - 2017-03-14 19:20 +0100
          Re: Guide(s?) to backup philosophies Miles Fidelman <mfidelman@meetinghouse.net> - 2017-03-14 20:20 +0100
            Re: Guide(s?) to backup philosophies Dan Ritter <dsr@randomstring.org> - 2017-03-14 21:40 +0100
              Re: Guide(s?) to backup philosophies Stefan Monnier <monnier@iro.umontreal.ca> - 2017-03-15 13:30 +0100
                Re: Guide(s?) to backup philosophies Dan Ritter <dsr@randomstring.org> - 2017-03-15 14:10 +0100
                Re: Guide(s?) to backup philosophies "Martin McCormick" <martin.m@suddenlink.net> - 2017-03-15 14:30 +0100
                Re: Guide(s?) to backup philosophies Jonathan Dowland <jmtd@debian.org> - 2017-03-15 16:40 +0100
                Re: Guide(s?) to backup philosophies Jonathan Dowland <jmtd@debian.org> - 2017-03-15 16:40 +0100
                Re: Guide(s?) to backup philosophies Stefan Monnier <monnier@iro.umontreal.ca> - 2017-03-15 21:50 +0100
                Re: Guide(s?) to backup philosophies songbird <songbird@anthive.com> - 2017-03-16 23:50 +0100
        Re: Guide(s?) to backup philosophies Miles Fidelman <mfidelman@meetinghouse.net> - 2017-03-14 20:10 +0100
  Re: Guide(s?) to backup philosophies Joe <joe@jretrading.com> - 2017-03-11 23:30 +0100
    Re: Guide(s?) to backup philosophies Jonathan Dowland <jmtd@debian.org> - 2017-03-15 13:30 +0100
  Re: Guide(s?) to backup philosophies Dan Ritter <dsr@randomstring.org> - 2017-03-13 15:20 +0100
    Re: Guide(s?) to backup philosophies David Christensen <dpchrist@holgerdanske.com> - 2017-03-14 05:10 +0100
    Re: Guide(s?) to backup philosophies Richard Owlett <rowlett@cloud85.net> - 2017-03-14 15:50 +0100
  Re: Guide(s?) to backup philosophies Merlin Büge <toni@bluenox07.de> - 2017-03-14 19:50 +0100
  Re: Guide(s?) to backup philosophies DdB <debianlist@potentially-spam.de-bruyn.de> - 2017-03-19 11:40 +0100

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