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Bug#564114: marked as done (e1000: Potential packet filtering bypass)

Your message dated Sun, 7 Feb 2010 23:12:49 +0100
with message-id <20100207221249.GA17049@inutil.org>
and subject line Re: e1000: Potential packet filtering bypass
has caused the Debian Bug report #564114,
regarding e1000: Potential packet filtering bypass
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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-- 
564114: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=564114
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: linux-2.6
Version: 2.6.32-4
Severity: normal
Tags: patch security

Fabian Yamaguchi made a presentation at 26C3
<http://events.ccc.de/congress/2009/Fahrplan/events/3596.en.html> which
included a bug in e1000 related to this fix for CVE-2009-1385:

commit ea30e11970a96cfe5e32c03a29332554573b4a10
Author: Neil Horman <nhorman@tuxdriver.com>
Date:   Tue Jun 2 01:29:58 2009 -0700

    e1000: add missing length check to e1000 receive routine

The bug is that the last part of a scattered frame will be accepted so
long as it is longer than 4 bytes.  This can be used to evade packet
filtering in front of the host with the e1000 hardware, since the packet
filter will look at the real frame headers but Linux will see the
'headers' in this last part.

Personally I doubt that many packet filters are configured to allow
jumbo frames through, hence severity is only 'normal'.

A proposed fix was posted in:
<http://article.gmane.org/gmane.linux.network/148454>

We should get a separate CVE number for this bug.

Ben.

-- System Information:
Debian Release: squeeze/sid
  APT prefers proposed-updates
  APT policy: (500, 'proposed-updates'), (500, 'unstable'), (500,
'stable'), (1, 'experimental')
Architecture: i386 (x86_64)

Kernel: Linux 2.6.32-trunk-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

-- 
Ben Hutchings
To err is human; to really foul things up requires a computer.

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--- End Message ---
--- Begin Message --- 
Version: 2.6.32-6

On Thu, Jan 07, 2010 at 07:12:36PM +0000, Ben Hutchings wrote:
> Package: linux-2.6
> Version: 2.6.32-4
> Severity: normal
> Tags: patch security
> 
> Fabian Yamaguchi made a presentation at 26C3
> <http://events.ccc.de/congress/2009/Fahrplan/events/3596.en.html> which
> included a bug in e1000 related to this fix for CVE-2009-1385:

Fixed in 2.6.32-6.

Cheers,
        Moritz

--- End Message ---
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