Bug 238947 (CVE-2007-1497) - CVE-2007-1497 IPv6 fragments bypass in nf_conntrack netfilter code
Summary: CVE-2007-1497 IPv6 fragments bypass in nf_conntrack netfilter code
Alias: CVE-2007-1497
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On:
TreeView+ depends on / blocked
Reported: 2007-05-04 02:03 UTC by Marcel Holtmann
Modified: 2019-09-29 12:20 UTC (History)
2 users (show)

Fixed In Version: RHSA-2007-0347
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2007-05-16 18:57:34 UTC

Attachments (Terms of Use)

System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2007:0347 0 normal SHIPPED_LIVE Important: kernel security and bug fix update 2007-05-16 18:56:58 UTC

Description Marcel Holtmann 2007-05-04 02:03:51 UTC
The nf_conntrack of the netfilter code does not set nfctinfo during reassembly
of fragmented packets, which leaves the default value as IP_CT_ESTABLISHED and
might allow remote attackers to bypass certain rulesets using IPv6 fragments.

Comment 1 Don Howard 2007-05-07 17:17:20 UTC
A patch for this issue has been included in build 2.6.18-8.1.4.el5.

Comment 2 Mike Gahagan 2007-05-09 21:19:26 UTC
confirmed the fix is in 2.6.18-8.1.4.el5.

Comment 5 Red Hat Bugzilla 2007-05-16 18:57:34 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.


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