Keith Owens writes:
> All these patches against request_module are attacking the problem at
> the wrong point. The kernel can request any module name it likes,
> using any string it likes, as long as the kernel generates the name.
> The real problem is when the kernel blindly accepts some user input and
> passes it straight to modprobe, then the kernel is acting like a setuid
> wrapper for a program that was never designed to run setuid.
Rather than add sanity checking to modprobe, it would be a lot easier
and safer from a security audit point of view to have the kernel call
/sbin/kmodprobe instead of /sbin/modprobe. Then kmodprobe can sanitise
all the data and exec the real modprobe. That way the only thing that
needs auditing is a string munging/sanitising program.
--Malcolm
-- Malcolm Beattie <mbeattie@sable.ox.ac.uk> Unix Systems Programmer Oxford University Computing Services - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Wed Nov 15 2000 - 21:00:25 EST