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Date: Thu, 2 May 2013 15:48:36 +0000
From: "Christey, Steven M." <>
To: "" <>,
	"" <>, ""
Subject: RE: Flightgear remote format string


Here is my interpretation of the problem.  I believe there is some confusion because people don't usually think that a flight simulator could be accessible from a "remote" location.

Is the following correct?

1) The Flightgear package includes a network server.  This server can be run using fgfs.exe and specifying a port number using the "-telnet" argument, for example.

2) The format string problem is in the server.

3) Your exploit makes a connection to the server (on port 5501).

4) The exploit sends a number of format strings in the cloud names (using the "property tree").  For some reason, it sends the same command 5 times, and it sends this command for "layers" 1 through 5. 

5) The exploit causes the server to crash.

- Steve

>-----Original Message-----
>From: Andrés Gómez Ramírez []
>Sent: Thursday, May 02, 2013 11:13 AM
>Subject: Re: [oss-security] Flightgear remote format string
>> So it's not on by default? Is there any documentation specifically you
>> can point me to regarding enabling/securing it?
>the detailed info is in the reference:
>if you need more info, please let me know.

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