Re: [Bluez-devel] Possible security vulnerability in hcid when calling pin helper

[Marcel Holtmann <marcel@holtmann.org>]

Hi Henryk,

> > thanks for catching this problem. Do you have a fix for it?
> 
> Now I have, I think. Doing string escaping in C is really awkward, but
> this patch should prefix all occurences of ", \, $ or ` in the name with
> an \, and will also change the enclosing single quotes to double quotes
> (because no escaping is possible in single quotes). There would also be
> an alternative way to fix it: remove the popen() and instead do a
> pipe()/fork()/dup2()/execv() combination. That should be more clean, but
> likely more complicated.

the final patch looks a little bit different, but it is now fixed in the
CVS tree. Thanks.

Regards

Marcel




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