Bug 149589 - CAN-2005-0209 netfilter SKB problem
Summary: CAN-2005-0209 netfilter SKB problem
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: kernel
Version: 4.0
Hardware: All
OS: Linux
medium
high
Target Milestone: ---
: ---
Assignee: David Miller
QA Contact: Brian Brock
URL:
Whiteboard: impact=important,public=20050124
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2005-02-24 10:46 UTC by Mark J. Cox
Modified: 2007-11-30 22:07 UTC (History)
3 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2005-04-19 18:52:25 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2005:366 0 high SHIPPED_LIVE Important: kernel security update 2005-04-19 04:00:00 UTC

Description Mark J. Cox 2005-02-24 10:46:52 UTC 
"If we forward a fragmented packet, we can have ip_summed set to
CHECKSUM_HW or similar.  This is fine for local protocol processing,
but once if we are forwarding this packet we want to reset ip_summed
to CHECKSUM_NONE."  This allows you to crash a host remotely using bad
fragments but only affects certain NICs.  Dave Miller said "Acenic and
SunGEM are the only two cards affected which are in widespread use."

Simple patch:
http://linux.bkbits.net:8080/linux-2.6/cset@41f59581p1swNaow4K1aBglV-q2jfQ
Comment 1 Josh Bressers 2005-04-19 18:52:25 UTC 
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2005-366.html
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