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Date: Mon, 22 Dec 2008 09:45:07 +0800
From: "Eugene Teo" <>
Cc: "Steven M. Christey" <>
Subject: Re: CVE request: kernel: watchdog: ib700wdt.c - buffer_underflow bug

On Wed, Dec 17, 2008 at 11:36 PM, Marcus Meissner <> wrote:
> On Wed, Dec 17, 2008 at 10:14:27AM +0800, Eugene Teo wrote:
>> On Wed, Dec 17, 2008 at 10:00 AM, Steven M. Christey
>> <> wrote:
>> >
>> > On Wed, 10 Dec 2008, Eugene Teo wrote:
>> >
>> >> Steve, here's another one that needs a CVE name. Thanks!
>> >>
>> >>
>> >
>> > Similar to the other issue, is this IOCTL reachable by anyone malicious?
>> From what I can see in ibwdt_ioctl(), it does not restrict access to
>> unprivileged users.
> Again, depends on how the device node is created I think. Not sure
> what mode udev hands out for those.

I discussed this with Wim, and it depends on the permissions for the
miscdev device, /dev/watchdog. On Fedora, it's accessible by root user

Thanks, Eugene

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