[RHSA-2017:0086-01] Important: kernel security, bug fix, and enhancement update

[news 28]

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Red Hat Security Advisory

 

Synopsis: Important: kernel security, bug fix, and enhancement update

Advisory ID: RHSA-2017:0086-01

Product: Red Hat Enterprise Linux

Advisory URL: https://rhn.redhat.com/errata/RHSA-2017-0086.html

Issue date: 2017-01-17

CVE Names: CVE-2016-6828 CVE-2016-7117 CVE-2016-9555

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1. Summary:

 

An update for kernel is now available for Red Hat Enterprise Linux 7.

 

Red Hat Product Security has rated this update as having a security impact

of Important. 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 Client (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode (v. 7) - noarch, x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64

Red Hat Enterprise Linux Server (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

 

3. Description:

 

The kernel packages contain the Linux kernel, the core of any Linux

operating system.

 

These updated kernel packages include several security issues and numerous

bug fixes, some of which you can see below. Space precludes documenting all

of these bug fixes in this advisory. To see the complete list of bug fixes,

users are directed to the related Knowledge Article:

https://access.redhat.com/articles/2857831.

 

Security Fix(es):

 

* A use-after-free vulnerability was found in the kernel's socket recvmmsg

subsystem. This may allow remote attackers to corrupt memory and may allow

execution of arbitrary code. This corruption takes place during the error

handling routines within __sys_recvmmsg() function. (CVE-2016-7117,

Important)

 

* A use-after-free vulnerability was found in tcp_xmit_retransmit_queue and

other tcp_* functions. This condition could allow an attacker to send an

incorrect selective acknowledgment to existing connections, possibly

resetting a connection. (CVE-2016-6828, Moderate)

 

* A flaw was found in the Linux kernel's implementation of the SCTP

protocol. A remote attacker could trigger an out-of-bounds read with an

offset of up to 64kB potentially causing the system to crash.

(CVE-2016-9555, Moderate)

 

Bug Fix(es):

 

* Previously, the performance of Internet Protocol over InfiniBand (IPoIB)

was suboptimal due to a conflict of IPoIB with the Generic Receive Offload

(GRO) infrastructure. With this update, the data cached by the IPoIB driver

has been moved from a control block into the IPoIB hard header, thus

avoiding the GRO problem and the corruption of IPoIB address information.

As a result, the performance of IPoIB has been improved. (BZ#1390668)

 

* Previously, when a virtual machine (VM) with PCI-Passthrough interfaces

was recreated, a race condition between the eventfd daemon and the virqfd

daemon occurred. Consequently, the operating system rebooted. This update

fixes the race condition. As a result, the operating system no longer

reboots in the described situation. (BZ#1391611)

 

* Previously, a packet loss occurred when the team driver in round-robin

mode was sending a large number of packets. This update fixes counting of

the packets in the round-robin runner of the team driver, and the packet

loss no longer occurs in the described situation. (BZ#1392023)

 

* Previously, the virtual network devices contained in the deleted

namespace could be deleted in any order. If the loopback device was not

deleted as the last item, other netns devices, such as vxlan devices, could

end up with dangling references to the loopback device. Consequently,

deleting a network namespace (netns) occasionally ended by a kernel oops.

With this update, the underlying source code has been fixed to ensure the

correct order when deleting the virtual network devices on netns deletion.

As a result, the kernel oops no longer occurs under the described

circumstances. (BZ#1392024)

 

* Previously, a Kabylake system with a Sunrise Point Platform Controller

Hub (PCH) with a PCI device ID of 0xA149 showed the following warning

messages during the boot:

 

"Unknown Intel PCH (0xa149) detected."

"Warning: Intel Kabylake processor with unknown PCH - this hardware has

not undergone testing by Red Hat and might not be certified. Please consult

https://hardware.redhat.com for certified hardware."

 

The messages were shown because this PCH was not properly recognized. With

this update, the problem has been fixed, and the operating system now boots

without displaying the warning messages. (BZ#1392033)

 

* Previously, the operating system occasionally became unresponsive after a

long run. This was caused by a race condition between the try_to_wake_up()

function and a woken up task in the core scheduler. With this update, the

race condition has been fixed, and the operating system no longer locks up

in the described scenario. (BZ#1393719)

 

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/):

 

1367091 - CVE-2016-6828 kernel: Use after free in tcp_xmit_retransmit_queue

1382268 - CVE-2016-7117 kernel: Use-after-free in the recvmmsg exit path

1397930 - CVE-2016-9555 kernel: Slab out-of-bounds access in sctp_sf_ootb()

 

6. Package List:

 

Red Hat Enterprise Linux Client (v. 7):

 

Source:

kernel-3.10.0-514.6.1.el7.src.rpm

 

noarch:

kernel-abi-whitelists-3.10.0-514.6.1.el7.noarch.rpm

kernel-doc-3.10.0-514.6.1.el7.noarch.rpm

 

x86_64:

kernel-3.10.0-514.6.1.el7.x86_64.rpm

kernel-debug-3.10.0-514.6.1.el7.x86_64.rpm

kernel-debug-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

kernel-debug-devel-3.10.0-514.6.1.el7.x86_64.rpm

kernel-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

kernel-debuginfo-common-x86_64-3.10.0-514.6.1.el7.x86_64.rpm

kernel-devel-3.10.0-514.6.1.el7.x86_64.rpm

kernel-headers-3.10.0-514.6.1.el7.x86_64.rpm

kernel-tools-3.10.0-514.6.1.el7.x86_64.rpm

kernel-tools-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

kernel-tools-libs-3.10.0-514.6.1.el7.x86_64.rpm

perf-3.10.0-514.6.1.el7.x86_64.rpm

perf-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

python-perf-3.10.0-514.6.1.el7.x86_64.rpm

python-perf-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

 

Red Hat Enterprise Linux Client Optional (v. 7):

 

x86_64:

kernel-debug-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

kernel-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

kernel-debuginfo-common-x86_64-3.10.0-514.6.1.el7.x86_64.rpm

kernel-tools-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

kernel-tools-libs-devel-3.10.0-514.6.1.el7.x86_64.rpm

perf-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

python-perf-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

 

Red Hat Enterprise Linux ComputeNode (v. 7):

 

Source:

kernel-3.10.0-514.6.1.el7.src.rpm

 

noarch:

kernel-abi-whitelists-3.10.0-514.6.1.el7.noarch.rpm

kernel-doc-3.10.0-514.6.1.el7.noarch.rpm

 

x86_64:

kernel-3.10.0-514.6.1.el7.x86_64.rpm

kernel-debug-3.10.0-514.6.1.el7.x86_64.rpm

kernel-debug-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

kernel-debug-devel-3.10.0-514.6.1.el7.x86_64.rpm

kernel-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

kernel-debuginfo-common-x86_64-3.10.0-514.6.1.el7.x86_64.rpm

kernel-devel-3.10.0-514.6.1.el7.x86_64.rpm

kernel-headers-3.10.0-514.6.1.el7.x86_64.rpm

kernel-tools-3.10.0-514.6.1.el7.x86_64.rpm

kernel-tools-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

kernel-tools-libs-3.10.0-514.6.1.el7.x86_64.rpm

perf-3.10.0-514.6.1.el7.x86_64.rpm

perf-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

python-perf-3.10.0-514.6.1.el7.x86_64.rpm

python-perf-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

 

Red Hat Enterprise Linux ComputeNode Optional (v. 7):

 

x86_64:

kernel-debug-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

kernel-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

kernel-debuginfo-common-x86_64-3.10.0-514.6.1.el7.x86_64.rpm

kernel-tools-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

kernel-tools-libs-devel-3.10.0-514.6.1.el7.x86_64.rpm

perf-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

python-perf-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

 

Red Hat Enterprise Linux Server (v. 7):

 

Source:

kernel-3.10.0-514.6.1.el7.src.rpm

 

noarch:

kernel-abi-whitelists-3.10.0-514.6.1.el7.noarch.rpm

kernel-doc-3.10.0-514.6.1.el7.noarch.rpm

 

ppc64:

kernel-3.10.0-514.6.1.el7.ppc64.rpm

kernel-bootwrapper-3.10.0-514.6.1.el7.ppc64.rpm

kernel-debug-3.10.0-514.6.1.el7.ppc64.rpm

kernel-debug-debuginfo-3.10.0-514.6.1.el7.ppc64.rpm

kernel-debug-devel-3.10.0-514.6.1.el7.ppc64.rpm

kernel-debuginfo-3.10.0-514.6.1.el7.ppc64.rpm

kernel-debuginfo-common-ppc64-3.10.0-514.6.1.el7.ppc64.rpm

kernel-devel-3.10.0-514.6.1.el7.ppc64.rpm

kernel-headers-3.10.0-514.6.1.el7.ppc64.rpm

kernel-tools-3.10.0-514.6.1.el7.ppc64.rpm

kernel-tools-debuginfo-3.10.0-514.6.1.el7.ppc64.rpm

kernel-tools-libs-3.10.0-514.6.1.el7.ppc64.rpm

perf-3.10.0-514.6.1.el7.ppc64.rpm

perf-debuginfo-3.10.0-514.6.1.el7.ppc64.rpm

python-perf-3.10.0-514.6.1.el7.ppc64.rpm

python-perf-debuginfo-3.10.0-514.6.1.el7.ppc64.rpm

 

ppc64le:

kernel-3.10.0-514.6.1.el7.ppc64le.rpm

kernel-bootwrapper-3.10.0-514.6.1.el7.ppc64le.rpm

kernel-debug-3.10.0-514.6.1.el7.ppc64le.rpm

kernel-debug-debuginfo-3.10.0-514.6.1.el7.ppc64le.rpm

kernel-debuginfo-3.10.0-514.6.1.el7.ppc64le.rpm

kernel-debuginfo-common-ppc64le-3.10.0-514.6.1.el7.ppc64le.rpm

kernel-devel-3.10.0-514.6.1.el7.ppc64le.rpm

kernel-headers-3.10.0-514.6.1.el7.ppc64le.rpm

kernel-tools-3.10.0-514.6.1.el7.ppc64le.rpm

kernel-tools-debuginfo-3.10.0-514.6.1.el7.ppc64le.rpm

kernel-tools-libs-3.10.0-514.6.1.el7.ppc64le.rpm

perf-3.10.0-514.6.1.el7.ppc64le.rpm

perf-debuginfo-3.10.0-514.6.1.el7.ppc64le.rpm

python-perf-3.10.0-514.6.1.el7.ppc64le.rpm

python-perf-debuginfo-3.10.0-514.6.1.el7.ppc64le.rpm

 

s390x:

kernel-3.10.0-514.6.1.el7.s390x.rpm

kernel-debug-3.10.0-514.6.1.el7.s390x.rpm

kernel-debug-debuginfo-3.10.0-514.6.1.el7.s390x.rpm

kernel-debug-devel-3.10.0-514.6.1.el7.s390x.rpm

kernel-debuginfo-3.10.0-514.6.1.el7.s390x.rpm

kernel-debuginfo-common-s390x-3.10.0-514.6.1.el7.s390x.rpm

kernel-devel-3.10.0-514.6.1.el7.s390x.rpm

kernel-headers-3.10.0-514.6.1.el7.s390x.rpm

kernel-kdump-3.10.0-514.6.1.el7.s390x.rpm

kernel-kdump-debuginfo-3.10.0-514.6.1.el7.s390x.rpm

kernel-kdump-devel-3.10.0-514.6.1.el7.s390x.rpm

perf-3.10.0-514.6.1.el7.s390x.rpm

perf-debuginfo-3.10.0-514.6.1.el7.s390x.rpm

python-perf-3.10.0-514.6.1.el7.s390x.rpm

python-perf-debuginfo-3.10.0-514.6.1.el7.s390x.rpm

 

x86_64:

kernel-3.10.0-514.6.1.el7.x86_64.rpm

kernel-debug-3.10.0-514.6.1.el7.x86_64.rpm

kernel-debug-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

kernel-debug-devel-3.10.0-514.6.1.el7.x86_64.rpm

kernel-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

kernel-debuginfo-common-x86_64-3.10.0-514.6.1.el7.x86_64.rpm

kernel-devel-3.10.0-514.6.1.el7.x86_64.rpm

kernel-headers-3.10.0-514.6.1.el7.x86_64.rpm

kernel-tools-3.10.0-514.6.1.el7.x86_64.rpm

kernel-tools-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

kernel-tools-libs-3.10.0-514.6.1.el7.x86_64.rpm

perf-3.10.0-514.6.1.el7.x86_64.rpm

perf-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

python-perf-3.10.0-514.6.1.el7.x86_64.rpm

python-perf-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

 

Red Hat Enterprise Linux Server Optional (v. 7):

 

ppc64:

kernel-debug-debuginfo-3.10.0-514.6.1.el7.ppc64.rpm

kernel-debuginfo-3.10.0-514.6.1.el7.ppc64.rpm

kernel-debuginfo-common-ppc64-3.10.0-514.6.1.el7.ppc64.rpm

kernel-tools-debuginfo-3.10.0-514.6.1.el7.ppc64.rpm

kernel-tools-libs-devel-3.10.0-514.6.1.el7.ppc64.rpm

perf-debuginfo-3.10.0-514.6.1.el7.ppc64.rpm

python-perf-debuginfo-3.10.0-514.6.1.el7.ppc64.rpm

 

ppc64le:

kernel-debug-debuginfo-3.10.0-514.6.1.el7.ppc64le.rpm

kernel-debug-devel-3.10.0-514.6.1.el7.ppc64le.rpm

kernel-debuginfo-3.10.0-514.6.1.el7.ppc64le.rpm

kernel-debuginfo-common-ppc64le-3.10.0-514.6.1.el7.ppc64le.rpm

kernel-tools-debuginfo-3.10.0-514.6.1.el7.ppc64le.rpm

kernel-tools-libs-devel-3.10.0-514.6.1.el7.ppc64le.rpm

perf-debuginfo-3.10.0-514.6.1.el7.ppc64le.rpm

python-perf-debuginfo-3.10.0-514.6.1.el7.ppc64le.rpm

 

x86_64:

kernel-debug-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

kernel-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

kernel-debuginfo-common-x86_64-3.10.0-514.6.1.el7.x86_64.rpm

kernel-tools-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

kernel-tools-libs-devel-3.10.0-514.6.1.el7.x86_64.rpm

perf-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

python-perf-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

 

Red Hat Enterprise Linux Workstation (v. 7):

 

Source:

kernel-3.10.0-514.6.1.el7.src.rpm

 

noarch:

kernel-abi-whitelists-3.10.0-514.6.1.el7.noarch.rpm

kernel-doc-3.10.0-514.6.1.el7.noarch.rpm

 

x86_64:

kernel-3.10.0-514.6.1.el7.x86_64.rpm

kernel-debug-3.10.0-514.6.1.el7.x86_64.rpm

kernel-debug-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

kernel-debug-devel-3.10.0-514.6.1.el7.x86_64.rpm

kernel-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

kernel-debuginfo-common-x86_64-3.10.0-514.6.1.el7.x86_64.rpm

kernel-devel-3.10.0-514.6.1.el7.x86_64.rpm

kernel-headers-3.10.0-514.6.1.el7.x86_64.rpm

kernel-tools-3.10.0-514.6.1.el7.x86_64.rpm

kernel-tools-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

kernel-tools-libs-3.10.0-514.6.1.el7.x86_64.rpm

perf-3.10.0-514.6.1.el7.x86_64.rpm

perf-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

python-perf-3.10.0-514.6.1.el7.x86_64.rpm

python-perf-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

 

Red Hat Enterprise Linux Workstation Optional (v. 7):

 

x86_64:

kernel-debug-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

kernel-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

kernel-debuginfo-common-x86_64-3.10.0-514.6.1.el7.x86_64.rpm

kernel-tools-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

kernel-tools-libs-devel-3.10.0-514.6.1.el7.x86_64.rpm

perf-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm

python-perf-debuginfo-3.10.0-514.6.1.el7.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-2016-6828

https://access.redhat.com/security/cve/CVE-2016-7117

https://access.redhat.com/security/cve/CVE-2016-9555

https://access.redhat.com/security/updates/classification/#important

https://access.redhat.com/articles/2857831

 

8. Contact:

 

The Red Hat security contact is . More contact

details at https://access.redhat.com/security/team/contact/

 

Copyright 2017 Red Hat, Inc.

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