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Subject: [Bug 194934] New: Telnet core dumped
Date: Mon, 10 Nov 2014 21:36:17 +0000
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X-Bugzilla-Version: 9.3-RELEASE
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X-Bugzilla-Severity: Affects Only Me
X-Bugzilla-Who: y.weweler@gmail.com
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=194934

            Bug ID: 194934
           Summary: Telnet core dumped
           Product: Base System
           Version: 9.3-RELEASE
          Hardware: amd64
                OS: Any
            Status: Needs Triage
          Severity: Affects Only Me
          Priority: ---
         Component: misc
          Assignee: freebsd-bugs@FreeBSD.org
          Reporter: y.weweler@gmail.com

Using the default "telnet" command from the FreeBSD 9.3-RELEASE

9.3-RELEASE FreeBSD 9.3-RELEASE #0 r268512: Thu Jul 10 23:44:39 UTC 2014

i am able to produce a core dump if pressing the key-combination STRG+5, STRG+4
after a plain connection to IPv4 based endpoint.


Example 1:
---------------------------------------
% telnet localhost 7777

Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
^]
telnet> ^\Verlassen(core dumped)



Core dumping telnet is even possible when pressing STRG+5 followed by any key
combination closed by STRG+4.

Example 2:
---------------------------------------
% telnet localhost 7777
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
^]
telnet> 123456^\Verlassen(core dumped)

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