[RHSA-2016:1277-01] Important: kernel security and bug fix update

[news 28]

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Red Hat Security Advisory

 

Synopsis: Important: kernel security and bug fix update

Advisory ID: RHSA-2016:1277-01

Product: Red Hat Enterprise Linux

Advisory URL: https://access.redhat.com/errata/RHSA-2016:1277

Issue date: 2016-06-23

CVE Names: CVE-2015-8767 CVE-2016-4565

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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/2361921.

 

Security Fixes:

 

* A flaw was found in the way certain interfaces of the Linux kernel's

Infiniband subsystem used write() as bi-directional ioctl() replacement,

which could lead to insufficient memory security checks when being invoked

using the splice() system call. A local unprivileged user on a system

with either Infiniband hardware present or RDMA Userspace Connection

Manager Access module explicitly loaded, could use this flaw to escalate

their privileges on the system. (CVE-2016-4565, Important)

 

* A race condition flaw was found in the way the Linux kernel's SCTP

implementation handled sctp_accept() during the processing of heartbeat

timeout events. A remote attacker could use this flaw to prevent further

connections to be accepted by the SCTP server running on the system,

resulting in a denial of service. (CVE-2015-8767, Moderate)

 

Red Hat would like to thank Jann Horn for reporting CVE-2016-4565.

 

Bug Fixes:

 

* When Small Computer System Interface (SCSI) devices were removed or

deleted, a system crash could occur due to a race condition between listing

all SCSI devices and SCSI device removal. The provided patch ensures that

the starting node for the klist_iter_init_node() function is actually a

member of the list before using it. As a result, a system crash no longer

occurs in the described scenario. (BZ#1333403)

 

* This update offers a reworked series of patches for the resizable hash

table (rhashtable) including a number of backported bug fixes and

enhancements from upstream. (BZ#1328801)

 

* Previously, the same value of the mperf Model-Specific Register (MSR)

read twice in a row could lead to a kernel panic due to the divide-by-zero

error. The provided patch fixes this bug, and the kernel now handles two

identical values of mperf gracefully. (BZ#1334438)

 

* When a transparent proxy application was running and the number of

established connections on the computer exceeded one million, unrelated

processes, such as curl or ssh, were unable to bind to a local IP on the

box to initiate a connection. The provided patch fixes the cooperation of

the REUSEADDR/NOREUSEADDR socket option, and thus prevents the local port

from being exhausted. As a result, the aforementioned bug no longer occurs

in the described scenario. (BZ#1323960)

 

* Previously, the kernel support for non-local bind for the IPv6 protocol

was incomplete. As a consequence, an attempt to bind a socket to an IPv6

address that is not assigned to the host could fail. The provided patch

includes changes in the ip_nonlocal_bind variable, which is now set to

allow binding to an IPv6 address that is not assigned to the host. As a

result, Linux servers are now able to bind to non-local IPv6 addresses as

expected. (BZ#1324502)

 

* On some servers with a faster CPU, USB initialization could previously

lead to a kernel hang during boot. If this inconvenience occurred when

booting the second kernel during the kdump operation, the kdump service

failed and the vmcore was lost. The provided upstream patch fixes this bug,

and the kernel no longer hangs after USB initialization. (BZ#1327581)

 

* Previously, when running iperf servers using the mlx4_en module, a kernel

panic occurred. The underlying source code has been fixed, and the kernel

panic no longer occurs in the described scenario. (BZ#1327583)

 

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/):

 

1297389 - CVE-2015-8767 kernel: SCTP denial of service during timeout

1310570 - CVE-2016-4565 kernel: infiniband: Unprivileged process can overwrite kernel memory using rdma_ucm.ko

 

6. Package List:

 

Red Hat Enterprise Linux Client (v. 7):

 

Source:

kernel-3.10.0-327.22.2.el7.src.rpm

 

noarch:

kernel-abi-whitelists-3.10.0-327.22.2.el7.noarch.rpm

kernel-doc-3.10.0-327.22.2.el7.noarch.rpm

 

x86_64:

kernel-3.10.0-327.22.2.el7.x86_64.rpm

kernel-debug-3.10.0-327.22.2.el7.x86_64.rpm

kernel-debug-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

kernel-debug-devel-3.10.0-327.22.2.el7.x86_64.rpm

kernel-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

kernel-debuginfo-common-x86_64-3.10.0-327.22.2.el7.x86_64.rpm

kernel-devel-3.10.0-327.22.2.el7.x86_64.rpm

kernel-headers-3.10.0-327.22.2.el7.x86_64.rpm

kernel-tools-3.10.0-327.22.2.el7.x86_64.rpm

kernel-tools-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

kernel-tools-libs-3.10.0-327.22.2.el7.x86_64.rpm

perf-3.10.0-327.22.2.el7.x86_64.rpm

perf-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

python-perf-3.10.0-327.22.2.el7.x86_64.rpm

python-perf-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

 

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

 

x86_64:

kernel-debug-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

kernel-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

kernel-debuginfo-common-x86_64-3.10.0-327.22.2.el7.x86_64.rpm

kernel-tools-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

kernel-tools-libs-devel-3.10.0-327.22.2.el7.x86_64.rpm

perf-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

python-perf-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

 

Red Hat Enterprise Linux ComputeNode (v. 7):

 

Source:

kernel-3.10.0-327.22.2.el7.src.rpm

 

noarch:

kernel-abi-whitelists-3.10.0-327.22.2.el7.noarch.rpm

kernel-doc-3.10.0-327.22.2.el7.noarch.rpm

 

x86_64:

kernel-3.10.0-327.22.2.el7.x86_64.rpm

kernel-debug-3.10.0-327.22.2.el7.x86_64.rpm

kernel-debug-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

kernel-debug-devel-3.10.0-327.22.2.el7.x86_64.rpm

kernel-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

kernel-debuginfo-common-x86_64-3.10.0-327.22.2.el7.x86_64.rpm

kernel-devel-3.10.0-327.22.2.el7.x86_64.rpm

kernel-headers-3.10.0-327.22.2.el7.x86_64.rpm

kernel-tools-3.10.0-327.22.2.el7.x86_64.rpm

kernel-tools-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

kernel-tools-libs-3.10.0-327.22.2.el7.x86_64.rpm

perf-3.10.0-327.22.2.el7.x86_64.rpm

perf-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

python-perf-3.10.0-327.22.2.el7.x86_64.rpm

python-perf-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

 

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

 

x86_64:

kernel-debug-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

kernel-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

kernel-debuginfo-common-x86_64-3.10.0-327.22.2.el7.x86_64.rpm

kernel-tools-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

kernel-tools-libs-devel-3.10.0-327.22.2.el7.x86_64.rpm

perf-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

python-perf-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

 

Red Hat Enterprise Linux Server (v. 7):

 

Source:

kernel-3.10.0-327.22.2.el7.src.rpm

 

noarch:

kernel-abi-whitelists-3.10.0-327.22.2.el7.noarch.rpm

kernel-doc-3.10.0-327.22.2.el7.noarch.rpm

 

ppc64:

kernel-3.10.0-327.22.2.el7.ppc64.rpm

kernel-bootwrapper-3.10.0-327.22.2.el7.ppc64.rpm

kernel-debug-3.10.0-327.22.2.el7.ppc64.rpm

kernel-debug-debuginfo-3.10.0-327.22.2.el7.ppc64.rpm

kernel-debug-devel-3.10.0-327.22.2.el7.ppc64.rpm

kernel-debuginfo-3.10.0-327.22.2.el7.ppc64.rpm

kernel-debuginfo-common-ppc64-3.10.0-327.22.2.el7.ppc64.rpm

kernel-devel-3.10.0-327.22.2.el7.ppc64.rpm

kernel-headers-3.10.0-327.22.2.el7.ppc64.rpm

kernel-tools-3.10.0-327.22.2.el7.ppc64.rpm

kernel-tools-debuginfo-3.10.0-327.22.2.el7.ppc64.rpm

kernel-tools-libs-3.10.0-327.22.2.el7.ppc64.rpm

perf-3.10.0-327.22.2.el7.ppc64.rpm

perf-debuginfo-3.10.0-327.22.2.el7.ppc64.rpm

python-perf-3.10.0-327.22.2.el7.ppc64.rpm

python-perf-debuginfo-3.10.0-327.22.2.el7.ppc64.rpm

 

ppc64le:

kernel-3.10.0-327.22.2.el7.ppc64le.rpm

kernel-bootwrapper-3.10.0-327.22.2.el7.ppc64le.rpm

kernel-debug-3.10.0-327.22.2.el7.ppc64le.rpm

kernel-debug-debuginfo-3.10.0-327.22.2.el7.ppc64le.rpm

kernel-debuginfo-3.10.0-327.22.2.el7.ppc64le.rpm

kernel-debuginfo-common-ppc64le-3.10.0-327.22.2.el7.ppc64le.rpm

kernel-devel-3.10.0-327.22.2.el7.ppc64le.rpm

kernel-headers-3.10.0-327.22.2.el7.ppc64le.rpm

kernel-tools-3.10.0-327.22.2.el7.ppc64le.rpm

kernel-tools-debuginfo-3.10.0-327.22.2.el7.ppc64le.rpm

kernel-tools-libs-3.10.0-327.22.2.el7.ppc64le.rpm

perf-3.10.0-327.22.2.el7.ppc64le.rpm

perf-debuginfo-3.10.0-327.22.2.el7.ppc64le.rpm

python-perf-3.10.0-327.22.2.el7.ppc64le.rpm

python-perf-debuginfo-3.10.0-327.22.2.el7.ppc64le.rpm

 

s390x:

kernel-3.10.0-327.22.2.el7.s390x.rpm

kernel-debug-3.10.0-327.22.2.el7.s390x.rpm

kernel-debug-debuginfo-3.10.0-327.22.2.el7.s390x.rpm

kernel-debug-devel-3.10.0-327.22.2.el7.s390x.rpm

kernel-debuginfo-3.10.0-327.22.2.el7.s390x.rpm

kernel-debuginfo-common-s390x-3.10.0-327.22.2.el7.s390x.rpm

kernel-devel-3.10.0-327.22.2.el7.s390x.rpm

kernel-headers-3.10.0-327.22.2.el7.s390x.rpm

kernel-kdump-3.10.0-327.22.2.el7.s390x.rpm

kernel-kdump-debuginfo-3.10.0-327.22.2.el7.s390x.rpm

kernel-kdump-devel-3.10.0-327.22.2.el7.s390x.rpm

perf-3.10.0-327.22.2.el7.s390x.rpm

perf-debuginfo-3.10.0-327.22.2.el7.s390x.rpm

python-perf-3.10.0-327.22.2.el7.s390x.rpm

python-perf-debuginfo-3.10.0-327.22.2.el7.s390x.rpm

 

x86_64:

kernel-3.10.0-327.22.2.el7.x86_64.rpm

kernel-debug-3.10.0-327.22.2.el7.x86_64.rpm

kernel-debug-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

kernel-debug-devel-3.10.0-327.22.2.el7.x86_64.rpm

kernel-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

kernel-debuginfo-common-x86_64-3.10.0-327.22.2.el7.x86_64.rpm

kernel-devel-3.10.0-327.22.2.el7.x86_64.rpm

kernel-headers-3.10.0-327.22.2.el7.x86_64.rpm

kernel-tools-3.10.0-327.22.2.el7.x86_64.rpm

kernel-tools-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

kernel-tools-libs-3.10.0-327.22.2.el7.x86_64.rpm

perf-3.10.0-327.22.2.el7.x86_64.rpm

perf-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

python-perf-3.10.0-327.22.2.el7.x86_64.rpm

python-perf-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

 

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

 

ppc64:

kernel-debug-debuginfo-3.10.0-327.22.2.el7.ppc64.rpm

kernel-debuginfo-3.10.0-327.22.2.el7.ppc64.rpm

kernel-debuginfo-common-ppc64-3.10.0-327.22.2.el7.ppc64.rpm

kernel-tools-debuginfo-3.10.0-327.22.2.el7.ppc64.rpm

kernel-tools-libs-devel-3.10.0-327.22.2.el7.ppc64.rpm

perf-debuginfo-3.10.0-327.22.2.el7.ppc64.rpm

python-perf-debuginfo-3.10.0-327.22.2.el7.ppc64.rpm

 

ppc64le:

kernel-debug-debuginfo-3.10.0-327.22.2.el7.ppc64le.rpm

kernel-debug-devel-3.10.0-327.22.2.el7.ppc64le.rpm

kernel-debuginfo-3.10.0-327.22.2.el7.ppc64le.rpm

kernel-debuginfo-common-ppc64le-3.10.0-327.22.2.el7.ppc64le.rpm

kernel-tools-debuginfo-3.10.0-327.22.2.el7.ppc64le.rpm

kernel-tools-libs-devel-3.10.0-327.22.2.el7.ppc64le.rpm

perf-debuginfo-3.10.0-327.22.2.el7.ppc64le.rpm

python-perf-debuginfo-3.10.0-327.22.2.el7.ppc64le.rpm

 

x86_64:

kernel-debug-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

kernel-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

kernel-debuginfo-common-x86_64-3.10.0-327.22.2.el7.x86_64.rpm

kernel-tools-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

kernel-tools-libs-devel-3.10.0-327.22.2.el7.x86_64.rpm

perf-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

python-perf-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

 

Red Hat Enterprise Linux Workstation (v. 7):

 

Source:

kernel-3.10.0-327.22.2.el7.src.rpm

 

noarch:

kernel-abi-whitelists-3.10.0-327.22.2.el7.noarch.rpm

kernel-doc-3.10.0-327.22.2.el7.noarch.rpm

 

x86_64:

kernel-3.10.0-327.22.2.el7.x86_64.rpm

kernel-debug-3.10.0-327.22.2.el7.x86_64.rpm

kernel-debug-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

kernel-debug-devel-3.10.0-327.22.2.el7.x86_64.rpm

kernel-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

kernel-debuginfo-common-x86_64-3.10.0-327.22.2.el7.x86_64.rpm

kernel-devel-3.10.0-327.22.2.el7.x86_64.rpm

kernel-headers-3.10.0-327.22.2.el7.x86_64.rpm

kernel-tools-3.10.0-327.22.2.el7.x86_64.rpm

kernel-tools-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

kernel-tools-libs-3.10.0-327.22.2.el7.x86_64.rpm

perf-3.10.0-327.22.2.el7.x86_64.rpm

perf-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

python-perf-3.10.0-327.22.2.el7.x86_64.rpm

python-perf-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

 

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

 

x86_64:

kernel-debug-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

kernel-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

kernel-debuginfo-common-x86_64-3.10.0-327.22.2.el7.x86_64.rpm

kernel-tools-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

kernel-tools-libs-devel-3.10.0-327.22.2.el7.x86_64.rpm

perf-debuginfo-3.10.0-327.22.2.el7.x86_64.rpm

python-perf-debuginfo-3.10.0-327.22.2.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-2015-8767

https://access.redhat.com/security/cve/CVE-2016-4565

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

https://access.redhat.com/articles/2361921

 

8. Contact:

 

The Red Hat security contact is . More contact

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

 

Copyright 2016 Red Hat, Inc.

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