Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2018.0274
Important: kernel-alt security and bug fix update
29 January 2018
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: kernel-alt
Publisher: Red Hat
Operating System: Red Hat Enterprise Linux Server 7
Impact/Access: Root Compromise -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2017-1000405 CVE-2016-5195
Reference: ASB-2018.0011
ASB-2016.0103
ESB-2017.2575
ESB-2017.1513
ESB-2017.1232
ESB-2016.2480
ESB-2016.2473
ESB-2016.2469
ESB-2016.2447
Original Bulletin:
https://access.redhat.com/errata/RHSA-2018:0180
- --------------------------BEGIN INCLUDED TEXT--------------------
- -----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
=====================================================================
Red Hat Security Advisory
Synopsis: Important: kernel-alt security and bug fix update
Advisory ID: RHSA-2018:0180-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2018:0180
Issue date: 2018-01-25
CVE Names: CVE-2017-1000405
=====================================================================
1. Summary:
An update for kernel-alt 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 for ARM and IBM Power LE (POWER9) Server (v. 7) - aarch64, noarch, ppc64le
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) - aarch64, noarch, ppc64le
3. Description:
The kernel-alt packages provide the Linux kernel version 4.x.
Security Fix(es):
* A flaw was found in the patches used to fix the 'dirtycow' vulnerability
(CVE-2016-5195). An attacker, able to run local code, can exploit a race
condition in transparent huge pages to modify usually read-only huge pages.
(CVE-2017-1000405)
Red Hat would like to thank Eylon Ben Yaakov and Daniel Shapiro for
reporting this issue.
Bug Fix(es):
* Previously, Red Hat Enterprise Linux 7.4 with the kernel version provided
by the kernel-alt package, did not support turning off transactional memory
(TM) on the POWER9 systems. With this update it is now possible to turn off
TM on the POWER9 systems. (BZ#1509974)
* Due to a bug in the ixgbe and i40e drivers, the socket buffer list (skb
list) in some cases got corrupted when running Red Hat Enterprise Linux 7.4
with the kernel version provided by the kernel-alt package on the POWER9
systems. Consequently, a kernel panic occurred. This update fixes ixgbe and
i40e, and the kernel no longer panics due to this behavior. (BZ#1518412)
* Users can lower the max_sectors_kb setting in the sysfs file system to
accommodate certain workloads. Previously, users needed to set the maximum
I/O size to either the block layer default or the optional preferred I/O
size reported by the device. This update fixes the scsi driver to keep the
current heuristic function for the initial setting of max_sectors_kb. As a
result, for subsequent invocations, the driver now only updates the current
queue limit if it exceeds the capabilities of the hardware. (BZ#1518432)
* When performing full-bootme tests on Boston ESS systems running Red Hat
Enterprise Linux 7.4 with the kernel version provided in the kernel-alt
package, a kernel panic occurred and the operating system dropped into the
XMON software. This update fixes the Multi-Queue Block IO Queueing
Mechanism (blk-mq), and the kernel no longer panics in these circumstances.
(BZ#1518433)
* When running the stress test on the file system with the gssstress
command, and pulling one disk from one recovery group, "kernel I/O error"
was reported, and gssstress became unresponsive. Gssstress now works as
expected under the described circumstances. (BZ#1522645)
* When using the fwupdate_xl710 utility to apply updates for NVM Intel
Ethernet Converged Network Adapter XL710 on machines running Red Hat
Enterpise Linux 7.4 with the kernel version provided in the kernel-alt
package, a deadlock sometimes occurred when the i40e driver was acquiring
access to the Non-Volatile Memory (NVM) of the device. Consequently, NVM
acquire timeouts occurred, the firmware update failed with the following
error message: "Failed Acquiring NVM resource for read err=-53 status=0xa",
and left the device's memory in a corrupted state. This update fixes the
i40e driver, and the firmware updates no longer fail due to this behavior.
(BZ#1522843)
* Previously, on POWER9 systems with more than 100 Pstates, the cpufreq
driver did not handle the cases when the NxN matrix denominated transition
table (trans_table) overflowed beyond the PAGE_SIZE boundary correctly.
Consequently, reading trans_table for any of the CPUs failed with the
following error:
"fill_read_buffer: show+0x0/0xa0 returned bad count"
With this update reading trans_table for any of the CPUs now proceeds as
expected under the described circumstances. (BZ#1522844)
* Previously, the /sys/firmware/opal/exports directory did not contain an
export node. Consequently, a range of memory in the Open Power Abstraction
Layer (OPAL) that the operating system attempted to export to user space
for debugging purposes was not available. With this update the sysfs file
under /sys/firmware/opal/exports is now available for each property found
there, and this file can be used for debugging purposes. (BZ#1522845)
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
5. Bugs fixed (https://bugzilla.redhat.com/):
1516514 - CVE-2017-1000405 kernel: pmd can become dirty without going through a COW cycle
6. Package List:
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7):
Source:
kernel-alt-4.11.0-44.4.1.el7a.src.rpm
aarch64:
kernel-debug-4.11.0-44.4.1.el7a.aarch64.rpm
kernel-debug-debuginfo-4.11.0-44.4.1.el7a.aarch64.rpm
kernel-debug-devel-4.11.0-44.4.1.el7a.aarch64.rpm
kernel-debuginfo-4.11.0-44.4.1.el7a.aarch64.rpm
kernel-debuginfo-common-aarch64-4.11.0-44.4.1.el7a.aarch64.rpm
kernel-devel-4.11.0-44.4.1.el7a.aarch64.rpm
kernel-headers-4.11.0-44.4.1.el7a.aarch64.rpm
kernel-tools-4.11.0-44.4.1.el7a.aarch64.rpm
kernel-tools-debuginfo-4.11.0-44.4.1.el7a.aarch64.rpm
kernel-tools-libs-4.11.0-44.4.1.el7a.aarch64.rpm
perf-4.11.0-44.4.1.el7a.aarch64.rpm
perf-debuginfo-4.11.0-44.4.1.el7a.aarch64.rpm
python-perf-4.11.0-44.4.1.el7a.aarch64.rpm
python-perf-debuginfo-4.11.0-44.4.1.el7a.aarch64.rpm
noarch:
kernel-abi-whitelists-4.11.0-44.4.1.el7a.noarch.rpm
kernel-doc-4.11.0-44.4.1.el7a.noarch.rpm
ppc64le:
kernel-bootwrapper-4.11.0-44.4.1.el7a.ppc64le.rpm
kernel-debug-4.11.0-44.4.1.el7a.ppc64le.rpm
kernel-debug-debuginfo-4.11.0-44.4.1.el7a.ppc64le.rpm
kernel-debug-devel-4.11.0-44.4.1.el7a.ppc64le.rpm
kernel-debuginfo-4.11.0-44.4.1.el7a.ppc64le.rpm
kernel-debuginfo-common-ppc64le-4.11.0-44.4.1.el7a.ppc64le.rpm
kernel-devel-4.11.0-44.4.1.el7a.ppc64le.rpm
kernel-headers-4.11.0-44.4.1.el7a.ppc64le.rpm
kernel-tools-4.11.0-44.4.1.el7a.ppc64le.rpm
kernel-tools-debuginfo-4.11.0-44.4.1.el7a.ppc64le.rpm
kernel-tools-libs-4.11.0-44.4.1.el7a.ppc64le.rpm
perf-4.11.0-44.4.1.el7a.ppc64le.rpm
perf-debuginfo-4.11.0-44.4.1.el7a.ppc64le.rpm
python-perf-4.11.0-44.4.1.el7a.ppc64le.rpm
python-perf-debuginfo-4.11.0-44.4.1.el7a.ppc64le.rpm
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7):
aarch64:
kernel-4.11.0-44.4.1.el7a.aarch64.rpm
kernel-debug-debuginfo-4.11.0-44.4.1.el7a.aarch64.rpm
kernel-debuginfo-4.11.0-44.4.1.el7a.aarch64.rpm
kernel-debuginfo-common-aarch64-4.11.0-44.4.1.el7a.aarch64.rpm
kernel-tools-debuginfo-4.11.0-44.4.1.el7a.aarch64.rpm
kernel-tools-libs-devel-4.11.0-44.4.1.el7a.aarch64.rpm
perf-debuginfo-4.11.0-44.4.1.el7a.aarch64.rpm
python-perf-debuginfo-4.11.0-44.4.1.el7a.aarch64.rpm
noarch:
kernel-abi-whitelists-4.11.0-44.4.1.el7a.noarch.rpm
kernel-doc-4.11.0-44.4.1.el7a.noarch.rpm
ppc64le:
kernel-4.11.0-44.4.1.el7a.ppc64le.rpm
kernel-debug-debuginfo-4.11.0-44.4.1.el7a.ppc64le.rpm
kernel-debuginfo-4.11.0-44.4.1.el7a.ppc64le.rpm
kernel-debuginfo-common-ppc64le-4.11.0-44.4.1.el7a.ppc64le.rpm
kernel-tools-debuginfo-4.11.0-44.4.1.el7a.ppc64le.rpm
kernel-tools-libs-devel-4.11.0-44.4.1.el7a.ppc64le.rpm
perf-debuginfo-4.11.0-44.4.1.el7a.ppc64le.rpm
python-perf-debuginfo-4.11.0-44.4.1.el7a.ppc64le.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-2017-1000405
https://access.redhat.com/security/updates/classification/#important
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2018 Red Hat, Inc.
- -----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
iD8DBQFaabkOXlSAg2UNWIIRArAGAJ9fUzct/j40OFP7ZR+PK14Uobw58gCgt6es
W55J3Gj30QEoRadSMvBj+eE=
=zkL/
- -----END PGP SIGNATURE-----
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
https://www.auscert.org.au/bulletins/
===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967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=Q+po
-----END PGP SIGNATURE-----