CVE-2009-4272

moderate-risk

Published 2010-01-27

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.

Do I need to act?

1.8% chance of exploitation in next 30 days

EPSS score — moderate exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 7.5/10 High

NETWORK / LOW complexity

Affected Products (6)

Virtualization

Linux Kernel

Enterprise Linux Desktop

Enterprise Linux Eus

Enterprise Linux Server

Enterprise Linux Workstation

Affected Vendors

Redhat Linux

References (24)

Broken Link http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=...

Third Party Advisory http://support.avaya.com/css/P8/documents/100073666

Broken Link http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.31

Mailing List http://www.openwall.com/lists/oss-security/2010/01/20/1

Mailing List http://www.openwall.com/lists/oss-security/2010/01/20/6

Exploit https://bugzilla.redhat.com/show_bug.cgi?id=545411

Third Party Advisory https://exchange.xforce.ibmcloud.com/vulnerabilities/55808

Broken Link https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3...

Vendor Advisory https://rhn.redhat.com/errata/RHSA-2010-0046.html

Vendor Advisory https://rhn.redhat.com/errata/RHSA-2010-0095.html

Broken Link http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=...

Third Party Advisory http://support.avaya.com/css/P8/documents/100073666

Broken Link http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.31

Mailing List http://www.openwall.com/lists/oss-security/2010/01/20/1

Mailing List http://www.openwall.com/lists/oss-security/2010/01/20/6

Exploit https://bugzilla.redhat.com/show_bug.cgi?id=545411

Third Party Advisory https://exchange.xforce.ibmcloud.com/vulnerabilities/55808

and 4 more references

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moderate-risk

Severity 26/34 · High

Exploitability 5/34 · Minimal

Exposure 13/34 · Low