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    CVE-2009-3623

    The lookup_cb_cred function in fs/nfsd/nfs4callback.c in the nfsd4 subsystem in the Linux kernel before 2.6.31.2 attempts to access a credentials cache even when a client specifies the AUTH_NULL authentication flavor, which allows remote attackers to cause a denial of service (NULL pointer dereference and system crash) via an NFSv4 mount request.

    Published:Sep 15, 2009
    Last Modified:Apr 23, 2026
    EPS:Oct 30, 2009
    EPSS Score:0.01326
    CVSS Score:7.8

    Affected Products

    Vendor
    Linux
    Product
    Linux Kernel

    Exploits

    No exploit reference

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    References

    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=80fc015bdfe1f5b870c1e1ee02d78e709523fee7
    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=886e3b7fe6054230c89ae078a09565ed183ecc73
    http://marc.info/?l=oss-security&m=125618753029631&w=2
    http://marc.info/?l=oss-security&m=125624036516377&w=2
    http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.31.2
    http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.32-rc1
    http://www.ubuntu.com/usn/usn-864-1
    https://bugzilla.redhat.com/show_bug.cgi?id=530269
    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=80fc015bdfe1f5b870c1e1ee02d78e709523fee7
    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=886e3b7fe6054230c89ae078a09565ed183ecc73
    http://marc.info/?l=oss-security&m=125618753029631&w=2
    http://marc.info/?l=oss-security&m=125624036516377&w=2
    http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.31.2
    http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.32-rc1
    http://www.ubuntu.com/usn/usn-864-1
    https://bugzilla.redhat.com/show_bug.cgi?id=530269

    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