CVE ID:	CVE-2009-4272
Description:	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.
Test IDs:	None available
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2009-4272 RHSA-2010:0046 https://rhn.redhat.com/errata/RHSA-2010-0046.html RHSA-2010:0095 https://rhn.redhat.com/errata/RHSA-2010-0095.html [oss-security] 20100120 CVE-2009-4272 kernel: emergency route cache flushing leads to node deadlock http://www.openwall.com/lists/oss-security/2010/01/20/1 [oss-security] 20100120 Re: CVE-2009-4272 kernel: emergency route cache flushing leads to node deadlock http://www.openwall.com/lists/oss-security/2010/01/20/6 http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=73e42897e8e5619eacb787d2ce69be12f47cfc21 http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=73e42897e8e5619eacb787d2ce69be12f47cfc21 http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=b6280b47a7a42970d098a3059f4ebe7e55e90d8d http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=b6280b47a7a42970d098a3059f4ebe7e55e90d8d http://support.avaya.com/css/P8/documents/100073666 http://support.avaya.com/css/P8/documents/100073666 http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.31 http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.31 https://bugzilla.redhat.com/show_bug.cgi?id=545411 https://bugzilla.redhat.com/show_bug.cgi?id=545411 linux-kernel-routing-dos(55808) https://exchange.xforce.ibmcloud.com/vulnerabilities/55808 oval:org.mitre.oval:def:11167 https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11167 oval:org.mitre.oval:def:7026 https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7026