Bug 213214

Summary: CVE-2006-5619 Lockup via /proc/net/ip6_flowlabel
Product: Red Hat Enterprise Linux 4 Reporter: Marcel Holtmann <holtmann>
Component: kernelAssignee: Thomas Graf <tgraf>
Status: CLOSED ERRATA QA Contact: Brian Brock <bbrock>
Severity: high Docs Contact:
Priority: medium    
Version: 4.0CC: davem, jmorris, rkhan, security-response-team
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard: impact=important,source=vendorsec,reported=20061031,public=20061031
Fixed In Version: RHSA-2007-0014 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2007-01-30 14:36:18 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 2006-10-31 10:07:11 UTC
From James Morris:

There's a bug in the seqfile handling for /proc/net/ip6_flowlabel, where, after
finding a flowlabel, the code will loop forever not finding any further
flowlabels, first traversing the rest of the hash bucket then just looping. This
bug can cause lockups and oopses, and is trivially invoked by an unpriveleged user.

Comment 3 Jason Baron 2006-12-11 22:14:45 UTC
committed in stream U5 build 42.30. A test kernel with this patch is available
from http://people.redhat.com/~jbaron/rhel4/


Comment 5 Jason Baron 2006-12-18 21:51:17 UTC
committed in stream E5 build 42.0.4

Comment 7 Mike Gahagan 2007-01-17 21:04:57 UTC
verified using the attached test case.


Comment 9 Red Hat Bugzilla 2007-01-30 14:36:21 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-2007-0014.html