So here it comes:

I made a patch, which enables SHMConfig by default.

Although this comes with a drawback: this option works in the way of allocating 
a shared memory for the configuration options. But this memory must have 
permissions set to 777, otherwise the logged in (usually non-root) user won't 
be able to change it's settings. So this way any local user logged in to X is 
able to change the settings.
I can't consider this as a vulnerability.

Please apply my patch, if possible.


** Attachment added: "patch for enabling SHMConfig"
   http://launchpadlibrarian.net/12264962/enable_SHMConfig.diff

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SHMConfig should be enabled by default, and gsynaptics should be installed by 
default on laptops
https://bugs.launchpad.net/bugs/155937
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