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Security Advisory - Moderate: kernel security, bug fix, update - RH EL6

Offline TerryF

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Red Hat has released a security update for EL6 that will apply to Koozali SME9.#, it has been rated as Moderate.

Update will be available from upstream as appropriate.

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                   Red Hat Security Advisory

Synopsis:          Moderate: kernel security and bug fix update
Advisory ID:       RHSA-2017:1372-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2017:1372
Issue date:        2017-05-30
CVE Names:         CVE-2017-6214
=====================================================================

1. Summary:

An update for kernel is now available for Red Hat Enterprise Linux 6.

Red Hat Product Security has rated this update as having a security impact
of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available for each vulnerability from
the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Desktop (v. 6) - i386, noarch, x86_64
Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, x86_64
Red Hat Enterprise Linux HPC Node (v. 6) - noarch, x86_64
Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64
Red Hat Enterprise Linux Server (v. 6) - i386, noarch, ppc64, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 6) - i386, noarch, x86_64
Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, x86_64

3. Description:

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

Security Fix(es):

* A flaw was found in the Linux kernel's handling of packets with the URG
flag. Applications using the splice() and tcp_splice_read() functionality
can allow a remote attacker to force the kernel to enter a condition in
which it can loop indefinitely. (CVE-2017-6214, Moderate)

Bug Fix(es):

* When executing certain Hadoop jobs, a kernel panic occasionally occurred
on multiple nodes of a cluster. This update fixes the kernel scheduler, and
the kernel panic no longer occurs under the described circumstances.
(BZ#1436241)

* Previously, memory leak of the struct cred data structure and related
data structures occasionally occurred. Consequently, system performance was
suboptimal with the symptoms of high I/O operations wait and small amount
of free memory. This update fixes the reference counter of the struct slab
cache to no longer cause imbalance between the calls to the get_cred()
function and the put_cred() function. As a result, the memory leak no
longer occurs under the described circumstances. (BZ#1443234)

* Previously, the be2net driver could not detect the link status properly
on IBM Power Systems. Consequently, the link status was always reported as
disconnected. With this update, be2net has been fixed, and the Network
Interface Cards (NICs) now report the link status correctly. (BZ#1442979)

* Previously, the RFF_ID and RFT_ID commands in the lpfc driver were issued
in an incorrect order. Consequently, users were not able to access Logical
Unit Numbers (LUNs). With this update, lpfc has been fixed to issue RFT_ID
before RFF_ID, which is the correct order. As a result, users can now
access LUNs as expected. (BZ#1439636)

* Previously, the kdump mechanism was trying to get the lock by the
vmalloc_sync_all() function during a kernel panic. Consequently, a deadlock
occurred, and the crashkernel did not boot. This update fixes the
vmalloc_sync_all() function to avoid synchronizing the vmalloc area on the
crashing CPU. As a result, the crashkernel parameter now boots as expected,
and the kernel dump is collected successfully under the described
circumstances. (BZ#1443499)

4. Solution:

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.

5. Bugs fixed (https://bugzilla.redhat.com/):

1426542 - CVE-2017-6214 kernel: ipv4/tcp: Infinite loop in tcp_splice_read()
--
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