[mythtv-users] Security concerns for my myth box

Michael Starks mythtv at michaelstarks.com
Thu Dec 16 13:05:41 UTC 2004

On Wed, 2004-12-15 at 21:23 -0500, Craig Partin wrote:
> Is SSH the only software people trust to listen for network
> connections?  What's wrong with apache and SSL?  And does myth
> (backend or frontend) listen for anything?  Are there dangers in just
> having one machine running myth also running network services?

Apache is mature enough where most people feel comfortable running it.
But even then, there are additional changes that could be made to
mitigate risk, such as chrooting it, compiling it with support for only
what you need, and making some changes to the default settings.

But I am thinking more along the lines of application weaknesses.
Please bear in mind that what I'm about to write has no basis in known
weaknesses in Myth or MythWeb; they are just somewhat likely scenarios.

Compromising a web application like MythWeb *could* lead to full system
compromise.  Consider that there is a MySQL backend, and unless MythWeb
does a very good job of sanitizing input, it might be possible to
manipulate the database.

If you could manipulate the database, and get some command or string of
your choice in there, when MythBackend reads the database (as root),
that custom input could further exploit something like a buffer
overflow.  Game over.

Like I said, this isn't based on known vulnerabilities in Myth or
MythWeb.  The developers may very well have considered these scenarios.
This is theoretical, but not uncommon.

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