From: Stefan Richter <stefanr@s5r6.in-berlin.de>
To: Clemens Ladisch <clemens@ladisch.de>
Cc: linux1394-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3] firewire: cdev: check write quadlet request length to avoid buffer overflow
Date: Wed, 7 Jul 2010 14:20:52 +0200 (CEST) [thread overview]
Message-ID: <tkrat.d41b80d60ff7d2cc@s5r6.in-berlin.de> (raw)
In-Reply-To: <4C346B44.2020407@ladisch.de>
On 7 Jul, Clemens Ladisch wrote:
> Stefan Richter wrote:
>> [...] Thus the only problem is that a bogus write quadlet
>> request with user-specified length of < 3 will put 1...4 random bytes
>> into the packet payload. But this is the user's problem then, not the
>> kernel's.
>
> But not being initialized, these are the kernel's bytes that get
> disclosed.
Yes. In which way can this be exploited though? For all practical
purposes, the signal-to-noise ratio of these 1...4 bytes seems to be 0.
--
Stefan Richter
-=====-==-=- -=== --===
http://arcgraph.de/sr/
next prev parent reply other threads:[~2010-07-07 12:22 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <4C29C1CA.1050705@ladisch.de>
2010-07-07 8:46 ` [PATCH] " Stefan Richter
2010-07-07 9:50 ` [PATCH v2] " Stefan Richter
2010-07-07 10:01 ` [PATCH v3] " Stefan Richter
2010-07-07 11:55 ` Clemens Ladisch
2010-07-07 12:20 ` Stefan Richter [this message]
2010-07-07 12:37 ` [PATCH v4] " Stefan Richter
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