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Vulnerability Details : CVE-2009-4272

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.
Publish Date : 2010-01-27 Last Update Date : 2012-03-19
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- CVSS Scores & Vulnerability Types

CVSS Score
7.8
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Denial Of Service
CWE ID 20

- Vendor Statements

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
Source: Redhat

- Additional Vendor Supplied Data

Vendor Impact CVSS Score CVSS Vector Report Date Publish Date
Redhat important
7.8
AV:N/AC:L/Au:N/C:N/I:N/A:C 2009-12-08 2010-01-19
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- Related OVAL Definitions

Title Definition Id Class Family
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 remo... oval:org.mitre.oval:def:11167 unix
ELSA-2010:0046: kernel security and bug fix update (Important) oval:org.mitre.oval:def:22940 unix
Red Hat Linux Kernel Routing Implementation Multiple Remote Denial of Service Vulnerabilities oval:org.mitre.oval:def:7026 unix
RHSA-2010:0046: kernel security and bug fix update (Important) oval:org.mitre.oval:def:21777 unix
RHSA-2010:0046: kernel security and bug fix update (Important) oval:com.redhat.rhsa:def:20100046 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2009-4272

# Product Type Vendor Product Version Update Edition Language
1 OS Linux Linux Kernel 2.6.18 Version Details Vulnerabilities
2 OS Redhat Enterprise Linux 5 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Linux Linux Kernel 1
Redhat Enterprise Linux 1

- References For CVE-2009-4272

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=73e42897e8e5619eacb787d2ce69be12f47cfc21 CONFIRM
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=b6280b47a7a42970d098a3059f4ebe7e55e90d8d CONFIRM
http://support.avaya.com/css/P8/documents/100073666 CONFIRM
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.31 CONFIRM
http://www.openwall.com/lists/oss-security/2010/01/20/1
MLIST [oss-security] 20100120 CVE-2009-4272 kernel: emergency route cache flushing leads to node deadlock
http://xforce.iss.net/xforce/xfdb/55808
XF linux-kernel-routing-dos(55808)
https://bugzilla.redhat.com/show_bug.cgi?id=545411 CONFIRM
https://rhn.redhat.com/errata/RHSA-2010-0046.html
REDHAT RHSA-2010:0046
https://rhn.redhat.com/errata/RHSA-2010-0095.html
REDHAT RHSA-2010:0095
http://www.openwall.com/lists/oss-security/2010/01/20/6
MLIST [oss-security] 20100120 Re: CVE-2009-4272 kernel: emergency route cache flushing leads to node deadlock

- Metasploit Modules Related To CVE-2009-4272

There are not any metasploit modules related to this vulnerability (Please visit www.metasploit.com for more information)


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