Bug 197387

Summary: CVE-2006-2934 SCTP netfilter DoS with chunkless packets
Product: Red Hat Enterprise Linux 4 Reporter: Marcel Holtmann <holtmann>
Component: kernelAssignee: Neil Horman <nhorman>
Status: CLOSED ERRATA QA Contact: Brian Brock <bbrock>
Severity: high Docs Contact:
Priority: medium    
Version: 4.0CC: jarod, jbaron, jturner, security-response-team
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard: impact=important,source=lkml,reported=20060630,public=20060630
Fixed In Version: RHSA-2006-0575 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2006-08-10 23:37:39 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 181411    
Attachments:
Description Flags
backport of the requested patch for RHEL-4 none

Description Marcel Holtmann 2006-06-30 19:34:17 UTC 
When a packet without any chunks is received, the newconntrack variable in
sctp_packet contains an out of bounds value that is used to look up an pointer
from the array of timeouts, which is then dereferenced, resulting in a crash.

Problem noticed by George A. Theall <theall>
Comment 1 Marcel Holtmann 2006-06-30 19:43:55 UTC 
The stable kernel fix can be found here:

http://www.kernel.org/git/?p=linux/kernel/git/stable/linux-2.6.17.y.git;a=commit;h=9c48e1ea8cf8800cc5e2d39ccbb8b5ff9704f8e9
Comment 4 Neil Horman 2006-07-06 14:37:11 UTC 
Created attachment 132002 [details]
backport of the requested patch for RHEL-4
Comment 9 Jason Baron 2006-07-12 19:42:11 UTC 
committed in stream U4 build 41. A test kernel with this patch is available from
http://people.redhat.com/~jbaron/rhel4/
Comment 15 Red Hat Bugzilla 2006-08-10 23:37:39 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-2006-0575.html