[Bug 270404] comsat is willing to try to read and display any file

From: <bugzilla-noreply_at_freebsd.org>
Date: Wed, 22 Mar 2023 14:18:02 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=270404

            Bug ID: 270404
           Summary: comsat is willing to try to read and display any file
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: bin
          Assignee: bugs@FreeBSD.org
          Reporter: rtm@lcs.mit.edu

If comsat is enabled in /etc/inetd.conf, and user is logged in and
accepting notifications, then sending comsat a UDP packet like

  user@0:../../etc/remote

will cause comsat to try to open /etc/remote (really
/var/mail/../../etc/remote) and display it on user's terminal.

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