oss-security - Re: kernel: ethtool: kernel buffer overflow in ETHTOOL

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Date: Tue, 29 Jun 2010 05:53:05 -1000
From: akuster <akuster@...sta.com>
To: Eugene Teo <eugeneteo@...nel.sg>
CC: oss-security@...ts.openwall.com, 
 "Steven M. Christey" <coley@...us.mitre.org>
Subject: Re: kernel: ethtool: kernel buffer overflow in ETHTOOL_GRXCLSRLALL

Eugene,

Thanks for the info. Unfortunately it does affect a few MontaVista
kernels. Is it possible to get a CVE for this?

Mahalo,
Armin

On 06/28/2010 04:10 PM, Eugene Teo wrote:
> FYI, "On a 32-bit machine, info.rule_cnt >= 0x40000000 leads to integer
> overflow and the buffer may be smaller than needed.  Since
> ETHTOOL_GRXCLSRLALL is unprivileged, this can presumably be used for at
> least denial of service." This was introduced in v2.6.27-rc1 via
> upstream commit 0853ad66. Also see commit 59089d8d.
> 
> Reference:
> http://thread.gmane.org/gmane.linux.network/164869
> https://bugzilla.redhat.com/show_bug.cgi?id=608950
> 
> I'm not requesting a CVE name for this as it did not affect any of our
> Red Hat supported Linux kernels.
> 
> Thanks, Eugene

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