CVE-2009-4272 Information

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.

Reference

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=73e42897e8e5619eacb787d2ce69be12f47cfc21 http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=b6280b47a7a42970d098a3059f4ebe7e55e90d8d http://support.avaya.com/css/P8/documents/100073666 http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.31 http://www.openwall.com/lists/oss-security/2010/01/20/1 http://www.openwall.com/lists/oss-security/2010/01/20/6 https://bugzilla.redhat.com/show_bug.cgi?id=545411 https://exchange.xforce.ibmcloud.com/vulnerabilities/55808 https://oval.cisecurity.org/repository/search/definition/oval3Aorg.mitre.oval3Adef3A11167 https://oval.cisecurity.org/repository/search/definition/oval3Aorg.mitre.oval3Adef3A7026 https://rhn.redhat.com/errata/RHSA-2010-0046.html https://rhn.redhat.com/errata/RHSA-2010-0095.html