The remote Redhat Enterprise Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2015:0751 advisory.

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

    * It was found that the Linux kernel's Infiniband subsystem did not     properly sanitize input parameters while registering memory regions from     user space via the (u)verbs API. A local user with access to a     /dev/infiniband/uverbsX device could use this flaw to crash the system or,     potentially, escalate their privileges on the system. (CVE-2014-8159,     Important)

    * A use-after-free flaw was found in the way the Linux kernel's SCTP     implementation handled authentication key reference counting during INIT     collisions. A remote attacker could use this flaw to crash the system or,     potentially, escalate their privileges on the system. (CVE-2015-1421,     Important)

    Red Hat would like to thank Mellanox for reporting the CVE-2014-8159 issue.
    The CVE-2015-1421 issue was discovered by Sun Baoliang of Red Hat.

    The MRG-Realtime 3.10 kernel-rt sources have been updated to include the     following bug fixes:

    * The kdump service could become unresponsive due to a deadlock in the     kernel call ioapic_lock.

    * Attempt to make metadata changes such as creating a thin device or     snapshot thin device did not error out cleanly.

    (BZ#1201384)

    This update also fixes the following bug:

    * The MRG kernel scheduler code was missing checks for the PREEMPT_LAZY     flag allowing tasks to be preempted more times than necessary causing     latency spikes on the system. Additional checks for the PREEMPT_LAZY flag     were added to the check_preempt_wakeup() and check_preempt_curr() functions     in the scheduler code so that preempt wakeups were reduced and these     latency spikes were removed. (BZ#1157949)

    All kernel-rt users are advised to upgrade to these updated packages, which     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.

Detections

Analytics

RHEL 6 : kernel-rt (RHSA-2015:0751)

critical Nessus Plugin ID 82467

Version 1.12