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Last updated: 10/25/2014 7:08:41 PM

CVE Publication rate: 51.03

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National Cyber Awareness System

Vulnerability Summary for CVE-2009-4272

Original release date: 01/27/2010
Last revised: 03/19/2012
Source: US-CERT/NIST

Overview

A certain Red Hat patch for net/ipv4/route.c in the Linux kernel 2.6.18 on Red Hat Enterprise Linux (RHEL) 5 allows remote attackers to cause a denial of service (deadlock) via crafted packets that force collisions in the IPv4 routing hash table, and trigger a routing "emergency" in which a hash chain is too long. NOTE: this is related to an issue in the Linux kernel before 2.6.31, when the kernel routing cache is disabled, involving an uninitialized pointer and a panic.

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score: 7.8 (HIGH) (AV:N/AC:L/Au:N/C:N/I:N/A:C) (legend)
Impact Subscore: 6.9
Exploitability Subscore: 10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type: Allows disruption of service

Vendor Statements (disclaimer)

Official Statement from Red Hat (01/28/2010)
This issue did not affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 3, 4 and Red Hat Enterprise MRG. Shipped kernels do not include upstream commits c6153b5b and 1080d709 that introduced the problem. It was addressed in Red Hat Enterprise Linux 5 via https://rhn.redhat.com/errata/RHSA-2010-0046.html

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External Source: MLIST
Name: [oss-security] 20100120 CVE-2009-4272 kernel: emergency route cache flushing leads to node deadlock
External Source: OVAL
Name: oval:org.mitre.oval:def:7026
External Source: CONFIRM
Name: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=b6280b47a7a42970d098a3059f4ebe7e55e90d8d
External Source: REDHAT
Name: RHSA-2010:0095
External Source: REDHAT
Name: RHSA-2010:0046
External Source: CONFIRM
Name: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=73e42897e8e5619eacb787d2ce69be12f47cfc21
External Source: CONFIRM
Name: http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.31
External Source: CONFIRM
Name: https://bugzilla.redhat.com/show_bug.cgi?id=545411
External Source: XF
Name: linux-kernel-routing-dos(55808)
External Source: MLIST
Name: [oss-security] 20100120 Re: CVE-2009-4272 kernel: emergency route cache flushing leads to node deadlock
External Source: CONFIRM
Name: http://support.avaya.com/css/P8/documents/100073666
External Source: OVAL
Name: oval:org.mitre.oval:def:11167

References to Check Content

Identifier: oval:org.mitre.oval:def:11167
Check System: http://oval.mitre.org/XMLSchema/oval-definitions-5
Identifier: oval:org.mitre.oval:def:7026
Check System: http://oval.mitre.org/XMLSchema/oval-definitions-5

Technical Details

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