The remote Redhat Enterprise Linux 5 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2012:0358 advisory.

    The kernel packages contain the Linux kernel, the core of any Linux     operating system.

    This update fixes the following security issues:

    * Using PCI passthrough without interrupt remapping support allowed Xen     hypervisor guests to generate MSI interrupts and thus potentially inject     traps. A privileged guest user could use this flaw to crash the host or     possibly escalate their privileges on the host. The fix for this issue can     prevent PCI passthrough working and guests starting. Refer to Red Hat     Bugzilla bug 715555 for details. (CVE-2011-1898, Important)

    * IPv6 fragment identification value generation could allow a remote     attacker to disrupt a target system's networking, preventing legitimate     users from accessing its services. (CVE-2011-2699, Important)

    * Using the SG_IO ioctl to issue SCSI requests to partitions or LVM volumes     resulted in the requests being passed to the underlying block device. If a     privileged user only had access to a single partition or LVM volume, they     could use this flaw to bypass those restrictions and gain read and write     access (and be able to issue other SCSI commands) to the entire block     device. Refer to Red Hat Knowledgebase article 67869, linked to in the     References, for further details about this issue. (CVE-2011-4127,     Important)

    * A flaw was found in the way the Linux kernel handled robust list pointers     of user-space held futexes across exec() calls. A local, unprivileged user     could use this flaw to cause a denial of service or, eventually, escalate     their privileges. (CVE-2012-0028, Important)

    * A missing boundary check was found in the Linux kernel's HFS file system     implementation. A local attacker could use this flaw to cause a denial of     service or escalate their privileges by mounting a specially-crafted disk.
    (CVE-2011-4330, Moderate)

    Red Hat would like to thank Fernando Gont for reporting CVE-2011-2699, and     Clement Lecigne for reporting CVE-2011-4330.

    This update also fixes the following bugs:

    * Previously, all timers for a Xen fully-virtualized domain were based on     the time stamp counter (TSC) of the underlying physical CPU. This could     cause observed time to go backwards on some hosts. This update moves all     timers except HPET to the Xen monotonic system time, which fixes the bug as     long as the HPET is removed from the configuration of the domain.
    (BZ#773359)

    * Previously, tests of the Microsoft Server Virtualization Validation     Program (SVVP) detected unreliability of the emulated HPET (High     Performance Event Timer) on some hosts. Now, HPET can be configured as a     per-domain configuration option; if it is disabled, the guest chooses a     more reliable timer source. Disabling HPET is suggested for Windows guests,     as well as fully-virtualized Linux guests that show occasional time went     backwards errors in the console. (BZ#773360)

    * SG_IO ioctls were not implemented correctly in the Red Hat Enterprise     Linux 5 virtio-blk driver. Sending an SG_IO ioctl request to a virtio-blk     disk caused the sending thread to enter an uninterruptible sleep state (D     state). With this update, SG_IO ioctls are rejected by the virtio-blk     driver; the ioctl system call simply returns an ENOTTY (Inappropriate     ioctl for device) error and the thread continues normally. (BZ#784658)

    Users should upgrade to these updated packages, which contain backported     patches to correct these issues. The system must be rebooted for this     update to take effect.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

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RHEL 5 : kernel (RHSA-2012:0358)

high Nessus Plugin ID 64030

Version 1.15