Messages in this thread | | | Date | Tue, 1 May 2007 10:52:14 +0100 | From | Alan Cox <> | Subject | Re: old buffer overflow in moxa driver |
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> > At the point you abuse these calls you can already just load arbitary > > data from userspace anyway. > > So the possible exploit will only work when run by root, is that what you > mean? If so isn't that still a security problem?
To exploit the hole you need CAP_SYS_RAWIO which is the highest capability of all. CAP_SYS_RAWIO gives you the ability to access hardware directly so since it checks for CAP_SYS_RAWIO it isn't security.
The patch isn't wrong however and adds some sanity checking so it would do no harm to send it to Andrew for -mm testing.
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