On 11/27/2012 11:25:59 AM, Bhushan Jain wrote:
> Hello Developers,
>
> I am a student at Stony Brook University researching system security.
> I noticed that the only reason dmcrypt-get-device (from eject
> package)
> needs setuid privilege is to read the major:minor numbers (unless I
> have missed something).
> A lot of distributions (Ubuntu, Fedora, etc.) are trying to avoid use
> of the setuid bit because it can potentially introduce a privilege
> escalation attack vector.
> I think the same thing could be accomplished by exporting the
> major:minor device numbers through a proc file, and then eliminate
> the
> need for dmcrypt-get-device.
> I would be happy to send you a patch that does this, if there is
> interest. Any comments/thoughts?
Speaking from ignorance, isn't there something in /sys with this
information? If so a patch to read from that might be better.
I'm ignorant, but I've this feeling that /proc is frowned upon.
Regards,
Karl <kop@xxxxxxxx>
Free Software: "You don't pay back, you pay forward."
-- Robert A. Heinlein
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