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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Moderate: kernel security, bug fix, and enhancement update
Advisory ID:       RHSA-2016:0855-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2016-0855.html
Issue date:        2016-05-10
CVE Names:         CVE-2010-5313 CVE-2013-4312 CVE-2014-7842 
                   CVE-2014-8134 CVE-2015-5156 CVE-2015-7509 
                   CVE-2015-8215 CVE-2015-8324 CVE-2015-8543 
=====================================================================

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):

* It was found that reporting emulation failures to user space could lead
to either a local (CVE-2014-7842) or a L2->L1 (CVE-2010-5313) denial of
service. In the case of a local denial of service, an attacker must have
access to the MMIO area or be able to access an I/O port. Please note that
on certain systems, HPET is mapped to userspace as part of vdso (vvar) and
thus an unprivileged user may generate MMIO transactions (and enter the
emulator) this way. (CVE-2010-5313, CVE-2014-7842, Moderate)

* It was found that the Linux kernel did not properly account file
descriptors passed over the unix socket against the process limit. A local
user could use this flaw to exhaust all available memory on the system.
(CVE-2013-4312, Moderate)

* A buffer overflow flaw was found in the way the Linux kernel's virtio-net
subsystem handled certain fraglists when the GRO (Generic Receive Offload)
functionality was enabled in a bridged network configuration. An attacker
on the local network could potentially use this flaw to crash the system,
or, although unlikely, elevate their privileges on the system.
(CVE-2015-5156, Moderate)

* It was found that the Linux kernel's IPv6 network stack did not properly
validate the value of the MTU variable when it was set. A remote attacker
could potentially use this flaw to disrupt a target system's networking
(packet loss) by setting an invalid MTU value, for example, via a
NetworkManager daemon that is processing router advertisement packets
running on the target system. (CVE-2015-8215, Moderate)

* A NULL pointer dereference flaw was found in the way the Linux kernel's
network subsystem handled socket creation with an invalid protocol
identifier. A local user could use this flaw to crash the system.
(CVE-2015-8543, Moderate)

* It was found that the espfix functionality does not work for 32-bit KVM
paravirtualized guests. A local, unprivileged guest user could potentially
use this flaw to leak kernel stack addresses. (CVE-2014-8134, Low)

* A flaw was found in the way the Linux kernel's ext4 file system driver
handled non-journal file systems with an orphan list. An attacker with
physical access to the system could use this flaw to crash the system or,
although unlikely, escalate their privileges on the system. (CVE-2015-7509,
Low)

* A NULL pointer dereference flaw was found in the way the Linux kernel's
ext4 file system driver handled certain corrupted file system images. An
attacker with physical access to the system could use this flaw to crash
the system. (CVE-2015-8324, Low)

Red Hat would like to thank Nadav Amit for reporting CVE-2010-5313 and
CVE-2014-7842, Andy Lutomirski for reporting CVE-2014-8134, and Dmitriy
Monakhov (OpenVZ) for reporting CVE-2015-8324. The CVE-2015-5156 issue was
discovered by Jason Wang (Red Hat).

Additional Changes:

* Refer to Red Hat Enterprise Linux 6.8 Release Notes for information on
new kernel features and known issues, and Red Hat Enterprise Linux
Technical Notes for information on device driver updates, important changes
to external kernel parameters, notable bug fixes, and technology previews.
Both of these documents are linked to in the References section.

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/):

697750 - [xfs] concurrent aio/dio got stuck
723722 - BUG: SELinux is preventing /usr/bin/nautilus (deleted) "write" access on /media/TerraVolume.
889368 - LVM RAID:  I/O can hang if entire stripe (mirror group) of RAID10 LV is killed while under snapshot
1066751 - tmpfs: creates files with inode number 0, rendering parent directory unremovable
1163762 - CVE-2010-5313 CVE-2014-7842 kernel: kvm: reporting emulation failures to userspace
1172765 - CVE-2014-8134 kernel: x86: espfix not working for 32-bit KVM paravirt guests
1197875 - CIFS DFS shares fail to mount when specifying sec= option
1225359 - bonding: fail to configure master mac address by initscripts
1242239 - md raid1 writemostly feature broken
1243852 - CVE-2015-5156 kernel: buffer overflow with fraglist larger than MAX_SKB_FRAGS + 2 in virtio-net
1248507 - kernel: [drm:cpt_set_fifo_underrun_reporting] *ERROR* uncleared pch fifo underrun on pch transcoder A
1254020 - RHEL6.6: NFS client has kernel panic after seeing 'VFS: Busy inodes after unmount ... Self-destruct in 5 seconds. Have a nice day'
1259222 - CVE-2015-7509 kernel: Mounting ext2 fs e2fsprogs/tests/f_orphan as ext4 crashes system
1259870 - Incomplete nl80211 backport broke hostapd
1267261 - CVE-2015-8324 kernel: Null pointer dereference when mounting ext4
1283253 - CVE-2015-8215 kernel: MTU value is not validated in IPv6 stack causing packet loss
1290475 - CVE-2015-8543 kernel: IPv6 connect causes DoS via NULL pointer dereference
1297813 - CVE-2013-4312 kernel: File descriptors passed over unix sockets are not properly accounted
1310661 - BUG: unable to handle kernel paging request at 65642072 followed by kernel panic

6. Package List:

Red Hat Enterprise Linux Desktop (v. 6):

Source:
kernel-2.6.32-642.el6.src.rpm

i386:
kernel-2.6.32-642.el6.i686.rpm
kernel-debug-2.6.32-642.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-642.el6.i686.rpm
kernel-debug-devel-2.6.32-642.el6.i686.rpm
kernel-debuginfo-2.6.32-642.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-642.el6.i686.rpm
kernel-devel-2.6.32-642.el6.i686.rpm
kernel-headers-2.6.32-642.el6.i686.rpm
perf-2.6.32-642.el6.i686.rpm
perf-debuginfo-2.6.32-642.el6.i686.rpm
python-perf-debuginfo-2.6.32-642.el6.i686.rpm

noarch:
kernel-abi-whitelists-2.6.32-642.el6.noarch.rpm
kernel-doc-2.6.32-642.el6.noarch.rpm
kernel-firmware-2.6.32-642.el6.noarch.rpm

x86_64:
kernel-2.6.32-642.el6.x86_64.rpm
kernel-debug-2.6.32-642.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-642.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-642.el6.x86_64.rpm
kernel-debug-devel-2.6.32-642.el6.i686.rpm
kernel-debug-devel-2.6.32-642.el6.x86_64.rpm
kernel-debuginfo-2.6.32-642.el6.i686.rpm
kernel-debuginfo-2.6.32-642.el6.x86_64.rpm
kernel-debuginfo-common-i686-2.6.32-642.el6.i686.rpm
kernel-debuginfo-common-x86_64-2.6.32-642.el6.x86_64.rpm
kernel-devel-2.6.32-642.el6.x86_64.rpm
kernel-headers-2.6.32-642.el6.x86_64.rpm
perf-2.6.32-642.el6.x86_64.rpm
perf-debuginfo-2.6.32-642.el6.i686.rpm
perf-debuginfo-2.6.32-642.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-642.el6.i686.rpm
python-perf-debuginfo-2.6.32-642.el6.x86_64.rpm

Red Hat Enterprise Linux Desktop Optional (v. 6):

i386:
kernel-debug-debuginfo-2.6.32-642.el6.i686.rpm
kernel-debuginfo-2.6.32-642.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-642.el6.i686.rpm
perf-debuginfo-2.6.32-642.el6.i686.rpm
python-perf-2.6.32-642.el6.i686.rpm
python-perf-debuginfo-2.6.32-642.el6.i686.rpm

x86_64:
kernel-debug-debuginfo-2.6.32-642.el6.x86_64.rpm
kernel-debuginfo-2.6.32-642.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-642.el6.x86_64.rpm
perf-debuginfo-2.6.32-642.el6.x86_64.rpm
python-perf-2.6.32-642.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-642.el6.x86_64.rpm

Red Hat Enterprise Linux HPC Node (v. 6):

Source:
kernel-2.6.32-642.el6.src.rpm

noarch:
kernel-abi-whitelists-2.6.32-642.el6.noarch.rpm
kernel-doc-2.6.32-642.el6.noarch.rpm
kernel-firmware-2.6.32-642.el6.noarch.rpm

x86_64:
kernel-2.6.32-642.el6.x86_64.rpm
kernel-debug-2.6.32-642.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-642.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-642.el6.x86_64.rpm
kernel-debug-devel-2.6.32-642.el6.i686.rpm
kernel-debug-devel-2.6.32-642.el6.x86_64.rpm
kernel-debuginfo-2.6.32-642.el6.i686.rpm
kernel-debuginfo-2.6.32-642.el6.x86_64.rpm
kernel-debuginfo-common-i686-2.6.32-642.el6.i686.rpm
kernel-debuginfo-common-x86_64-2.6.32-642.el6.x86_64.rpm
kernel-devel-2.6.32-642.el6.x86_64.rpm
kernel-headers-2.6.32-642.el6.x86_64.rpm
perf-2.6.32-642.el6.x86_64.rpm
perf-debuginfo-2.6.32-642.el6.i686.rpm
perf-debuginfo-2.6.32-642.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-642.el6.i686.rpm
python-perf-debuginfo-2.6.32-642.el6.x86_64.rpm

Red Hat Enterprise Linux HPC Node Optional (v. 6):

x86_64:
kernel-debug-debuginfo-2.6.32-642.el6.x86_64.rpm
kernel-debuginfo-2.6.32-642.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-642.el6.x86_64.rpm
perf-debuginfo-2.6.32-642.el6.x86_64.rpm
python-perf-2.6.32-642.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-642.el6.x86_64.rpm

Red Hat Enterprise Linux Server (v. 6):

Source:
kernel-2.6.32-642.el6.src.rpm

i386:
kernel-2.6.32-642.el6.i686.rpm
kernel-debug-2.6.32-642.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-642.el6.i686.rpm
kernel-debug-devel-2.6.32-642.el6.i686.rpm
kernel-debuginfo-2.6.32-642.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-642.el6.i686.rpm
kernel-devel-2.6.32-642.el6.i686.rpm
kernel-headers-2.6.32-642.el6.i686.rpm
perf-2.6.32-642.el6.i686.rpm
perf-debuginfo-2.6.32-642.el6.i686.rpm
python-perf-debuginfo-2.6.32-642.el6.i686.rpm

noarch:
kernel-abi-whitelists-2.6.32-642.el6.noarch.rpm
kernel-doc-2.6.32-642.el6.noarch.rpm
kernel-firmware-2.6.32-642.el6.noarch.rpm

ppc64:
kernel-2.6.32-642.el6.ppc64.rpm
kernel-bootwrapper-2.6.32-642.el6.ppc64.rpm
kernel-debug-2.6.32-642.el6.ppc64.rpm
kernel-debug-debuginfo-2.6.32-642.el6.ppc64.rpm
kernel-debug-devel-2.6.32-642.el6.ppc64.rpm
kernel-debuginfo-2.6.32-642.el6.ppc64.rpm
kernel-debuginfo-common-ppc64-2.6.32-642.el6.ppc64.rpm
kernel-devel-2.6.32-642.el6.ppc64.rpm
kernel-headers-2.6.32-642.el6.ppc64.rpm
perf-2.6.32-642.el6.ppc64.rpm
perf-debuginfo-2.6.32-642.el6.ppc64.rpm
python-perf-debuginfo-2.6.32-642.el6.ppc64.rpm

s390x:
kernel-2.6.32-642.el6.s390x.rpm
kernel-debug-2.6.32-642.el6.s390x.rpm
kernel-debug-debuginfo-2.6.32-642.el6.s390x.rpm
kernel-debug-devel-2.6.32-642.el6.s390x.rpm
kernel-debuginfo-2.6.32-642.el6.s390x.rpm
kernel-debuginfo-common-s390x-2.6.32-642.el6.s390x.rpm
kernel-devel-2.6.32-642.el6.s390x.rpm
kernel-headers-2.6.32-642.el6.s390x.rpm
kernel-kdump-2.6.32-642.el6.s390x.rpm
kernel-kdump-debuginfo-2.6.32-642.el6.s390x.rpm
kernel-kdump-devel-2.6.32-642.el6.s390x.rpm
perf-2.6.32-642.el6.s390x.rpm
perf-debuginfo-2.6.32-642.el6.s390x.rpm
python-perf-debuginfo-2.6.32-642.el6.s390x.rpm

x86_64:
kernel-2.6.32-642.el6.x86_64.rpm
kernel-debug-2.6.32-642.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-642.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-642.el6.x86_64.rpm
kernel-debug-devel-2.6.32-642.el6.i686.rpm
kernel-debug-devel-2.6.32-642.el6.x86_64.rpm
kernel-debuginfo-2.6.32-642.el6.i686.rpm
kernel-debuginfo-2.6.32-642.el6.x86_64.rpm
kernel-debuginfo-common-i686-2.6.32-642.el6.i686.rpm
kernel-debuginfo-common-x86_64-2.6.32-642.el6.x86_64.rpm
kernel-devel-2.6.32-642.el6.x86_64.rpm
kernel-headers-2.6.32-642.el6.x86_64.rpm
perf-2.6.32-642.el6.x86_64.rpm
perf-debuginfo-2.6.32-642.el6.i686.rpm
perf-debuginfo-2.6.32-642.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-642.el6.i686.rpm
python-perf-debuginfo-2.6.32-642.el6.x86_64.rpm

Red Hat Enterprise Linux Server Optional (v. 6):

i386:
kernel-debug-debuginfo-2.6.32-642.el6.i686.rpm
kernel-debuginfo-2.6.32-642.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-642.el6.i686.rpm
perf-debuginfo-2.6.32-642.el6.i686.rpm
python-perf-2.6.32-642.el6.i686.rpm
python-perf-debuginfo-2.6.32-642.el6.i686.rpm

ppc64:
kernel-debug-debuginfo-2.6.32-642.el6.ppc64.rpm
kernel-debuginfo-2.6.32-642.el6.ppc64.rpm
kernel-debuginfo-common-ppc64-2.6.32-642.el6.ppc64.rpm
perf-debuginfo-2.6.32-642.el6.ppc64.rpm
python-perf-2.6.32-642.el6.ppc64.rpm
python-perf-debuginfo-2.6.32-642.el6.ppc64.rpm

s390x:
kernel-debug-debuginfo-2.6.32-642.el6.s390x.rpm
kernel-debuginfo-2.6.32-642.el6.s390x.rpm
kernel-debuginfo-common-s390x-2.6.32-642.el6.s390x.rpm
kernel-kdump-debuginfo-2.6.32-642.el6.s390x.rpm
perf-debuginfo-2.6.32-642.el6.s390x.rpm
python-perf-2.6.32-642.el6.s390x.rpm
python-perf-debuginfo-2.6.32-642.el6.s390x.rpm

x86_64:
kernel-debug-debuginfo-2.6.32-642.el6.x86_64.rpm
kernel-debuginfo-2.6.32-642.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-642.el6.x86_64.rpm
perf-debuginfo-2.6.32-642.el6.x86_64.rpm
python-perf-2.6.32-642.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-642.el6.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:
kernel-2.6.32-642.el6.src.rpm

i386:
kernel-2.6.32-642.el6.i686.rpm
kernel-debug-2.6.32-642.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-642.el6.i686.rpm
kernel-debug-devel-2.6.32-642.el6.i686.rpm
kernel-debuginfo-2.6.32-642.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-642.el6.i686.rpm
kernel-devel-2.6.32-642.el6.i686.rpm
kernel-headers-2.6.32-642.el6.i686.rpm
perf-2.6.32-642.el6.i686.rpm
perf-debuginfo-2.6.32-642.el6.i686.rpm
python-perf-debuginfo-2.6.32-642.el6.i686.rpm

noarch:
kernel-abi-whitelists-2.6.32-642.el6.noarch.rpm
kernel-doc-2.6.32-642.el6.noarch.rpm
kernel-firmware-2.6.32-642.el6.noarch.rpm

x86_64:
kernel-2.6.32-642.el6.x86_64.rpm
kernel-debug-2.6.32-642.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-642.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-642.el6.x86_64.rpm
kernel-debug-devel-2.6.32-642.el6.i686.rpm
kernel-debug-devel-2.6.32-642.el6.x86_64.rpm
kernel-debuginfo-2.6.32-642.el6.i686.rpm
kernel-debuginfo-2.6.32-642.el6.x86_64.rpm
kernel-debuginfo-common-i686-2.6.32-642.el6.i686.rpm
kernel-debuginfo-common-x86_64-2.6.32-642.el6.x86_64.rpm
kernel-devel-2.6.32-642.el6.x86_64.rpm
kernel-headers-2.6.32-642.el6.x86_64.rpm
perf-2.6.32-642.el6.x86_64.rpm
perf-debuginfo-2.6.32-642.el6.i686.rpm
perf-debuginfo-2.6.32-642.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-642.el6.i686.rpm
python-perf-debuginfo-2.6.32-642.el6.x86_64.rpm

Red Hat Enterprise Linux Workstation Optional (v. 6):

i386:
kernel-debug-debuginfo-2.6.32-642.el6.i686.rpm
kernel-debuginfo-2.6.32-642.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-642.el6.i686.rpm
perf-debuginfo-2.6.32-642.el6.i686.rpm
python-perf-2.6.32-642.el6.i686.rpm
python-perf-debuginfo-2.6.32-642.el6.i686.rpm

x86_64:
kernel-debug-debuginfo-2.6.32-642.el6.x86_64.rpm
kernel-debuginfo-2.6.32-642.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-642.el6.x86_64.rpm
perf-debuginfo-2.6.32-642.el6.x86_64.rpm
python-perf-2.6.32-642.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-642.el6.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2010-5313
https://access.redhat.com/security/cve/CVE-2013-4312
https://access.redhat.com/security/cve/CVE-2014-7842
https://access.redhat.com/security/cve/CVE-2014-8134
https://access.redhat.com/security/cve/CVE-2015-5156
https://access.redhat.com/security/cve/CVE-2015-7509
https://access.redhat.com/security/cve/CVE-2015-8215
https://access.redhat.com/security/cve/CVE-2015-8324
https://access.redhat.com/security/cve/CVE-2015-8543
https://access.redhat.com/security/updates/classification/#moderate
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/6.8_Release_Notes/index.html
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/6.8_Technical_Notes/index.html

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2016 Red Hat, Inc.
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