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    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.

    Published:Jan 19, 2010
    Last Modified:Apr 11, 2025
    EPS:Jan 27, 2010
    EPSS Score:0.0181
    CVSS Score:7.5

    Affected Products

    Vendor
    Linux
    Product
    Linux Kernel
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Enterprise Linux Desktop
    Vendor
    Redhat
    Product
    Enterprise Linux Eus
    Vendor
    Redhat
    Product
    Enterprise Linux Server
    Vendor
    Redhat
    Product
    Enterprise Linux Workstation
    Vendor
    Redhat
    Product
    Virtualization

    Exploits

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

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    References

    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://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/oval%3Aorg.mitre.oval%3Adef%3A11167
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7026
    https://rhn.redhat.com/errata/RHSA-2010-0046.html
    https://rhn.redhat.com/errata/RHSA-2010-0095.html
    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://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/oval%3Aorg.mitre.oval%3Adef%3A11167
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7026
    https://rhn.redhat.com/errata/RHSA-2010-0046.html
    https://rhn.redhat.com/errata/RHSA-2010-0095.html

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High