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Bug 204912

Summary:	CVE-2006-4623 Wrong handling of DVB ULE SNDU with length of 0
Product:	Red Hat Enterprise Linux 4	Reporter:	Marcel Holtmann <holtmann>
Component:	kernel	Assignee:	Neil Horman <nhorman>
Status:	CLOSED ERRATA	QA Contact:	Brian Brock <bbrock>
Severity:	low	Docs Contact:
Priority:	medium
Version:	4.0	CC:	jbaron, security-response-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:	impact=low,source=vendorsec,reported=20060821,public=20060821
Fixed In Version:	RHSA-2006-0689	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2006-10-05 19:20:27 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:

Description Marcel Holtmann 2006-09-01 10:39:05 UTC

From Ang Way Chuang:

ULE (Unidirectional Lightweight Encapsulation RFC 4326) decapsulation code has a
bug that allows an attacker to send a malformed ULE packet with SNDU length of 0
and bring down the receiving machine. The kernel will produce a dump during
CRC32 checking on faulty ULE packet.

Comment 5 Neil Horman 2006-09-15 19:49:53 UTC

 don't have any hardware to test this, but it looks pretty obvious.  I'll smoke
test and patch

Comment 6 Jason Baron 2006-09-22 00:40:49 UTC

committed in stream U5 build 42.13. A test kernel with this patch is available
from http://people.redhat.com/~jbaron/rhel4/

Comment 7 Jason Baron 2006-09-26 14:38:21 UTC

committed in stream E5 build 42.0.3

Comment 8 RHEL Program Management 2006-09-27 22:35:41 UTC

This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux maintenance release.  Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products.  This request is not yet committed for inclusion in an Update
release.

Comment 11 Red Hat Bugzilla 2006-10-05 19:20:27 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-2006-0689.html