Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-2018.3473
RHEL 7.5 EUS kernel security, bug fix, and enhancement update
7 November 2018
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: kernel
Publisher: Red Hat
Operating System: Red Hat Enterprise Linux Server 7
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2018-5391 CVE-2017-18344
Reference: ESB-2018.3377
ESB-2018.2887
ESB-2018.2342
Original Bulletin:
https://access.redhat.com/errata/RHSA-2018:3459
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Red Hat Security Advisory
Synopsis: Important: kernel security, bug fix, and enhancement update
Advisory ID: RHSA-2018:3459-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2018:3459
Issue date: 2018-11-06
CVE Names: CVE-2017-18344 CVE-2018-5391
=====================================================================
1. Summary:
An update for kernel is now available for Red Hat Enterprise Linux 7.5
Extended Update Support.
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 ComputeNode EUS (v. 7.5) - noarch, x86_64
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.5) - x86_64
Red Hat Enterprise Linux Server EUS (v. 7.5) - noarch, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional EUS (v. 7.5) - ppc64, ppc64le, x86_64
3. Description:
The kernel packages contain the Linux kernel, the core of any Linux
operating system.
Security Fix(es):
* A flaw named FragmentSmack was found in the way the Linux kernel handled
reassembly of fragmented IPv4 and IPv6 packets. A remote attacker could use
this flaw to trigger time and calculation expensive fragment reassembly
algorithm by sending specially crafted packets which could lead to a CPU
saturation and hence a denial of service on the system. (CVE-2018-5391)
* kernel: out-of-bounds access in the show_timer function in
kernel/time/posix-timers.c (CVE-2017-18344)
For more details about the security issue(s), including the impact, a CVSS
score, and other related information, refer to the CVE page(s) listed in
the References section.
Red Hat would like to thank Juha-Matti Tilli (Aalto University - Department
of Communications and Networking and Nokia Bell Labs) for reporting
CVE-2018-5391.
Bug Fix(es):
These updated kernel packages include also numerous bug fixes. Space
precludes documenting all of the bug fixes in this advisory. See the
descriptions in the related Knowledge Article:
https://access.redhat.com/articles/3674801
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/):
1609664 - CVE-2018-5391 kernel: IP fragments with random offsets allow a remote denial of service (FragmentSmack)
1610958 - CVE-2017-18344 kernel: out-of-bounds access in the show_timer function in kernel/time/posix-timers.c
6. Package List:
Red Hat Enterprise Linux ComputeNode EUS (v. 7.5):
Source:
kernel-3.10.0-862.20.2.el7.src.rpm
noarch:
kernel-abi-whitelists-3.10.0-862.20.2.el7.noarch.rpm
kernel-doc-3.10.0-862.20.2.el7.noarch.rpm
x86_64:
kernel-3.10.0-862.20.2.el7.x86_64.rpm
kernel-debug-3.10.0-862.20.2.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-862.20.2.el7.x86_64.rpm
kernel-debug-devel-3.10.0-862.20.2.el7.x86_64.rpm
kernel-debuginfo-3.10.0-862.20.2.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-862.20.2.el7.x86_64.rpm
kernel-devel-3.10.0-862.20.2.el7.x86_64.rpm
kernel-headers-3.10.0-862.20.2.el7.x86_64.rpm
kernel-tools-3.10.0-862.20.2.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-862.20.2.el7.x86_64.rpm
kernel-tools-libs-3.10.0-862.20.2.el7.x86_64.rpm
perf-3.10.0-862.20.2.el7.x86_64.rpm
perf-debuginfo-3.10.0-862.20.2.el7.x86_64.rpm
python-perf-3.10.0-862.20.2.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-862.20.2.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.5):
x86_64:
kernel-debug-debuginfo-3.10.0-862.20.2.el7.x86_64.rpm
kernel-debuginfo-3.10.0-862.20.2.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-862.20.2.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-862.20.2.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-862.20.2.el7.x86_64.rpm
perf-debuginfo-3.10.0-862.20.2.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-862.20.2.el7.x86_64.rpm
Red Hat Enterprise Linux Server EUS (v. 7.5):
Source:
kernel-3.10.0-862.20.2.el7.src.rpm
noarch:
kernel-abi-whitelists-3.10.0-862.20.2.el7.noarch.rpm
kernel-doc-3.10.0-862.20.2.el7.noarch.rpm
ppc64:
kernel-3.10.0-862.20.2.el7.ppc64.rpm
kernel-bootwrapper-3.10.0-862.20.2.el7.ppc64.rpm
kernel-debug-3.10.0-862.20.2.el7.ppc64.rpm
kernel-debug-debuginfo-3.10.0-862.20.2.el7.ppc64.rpm
kernel-debug-devel-3.10.0-862.20.2.el7.ppc64.rpm
kernel-debuginfo-3.10.0-862.20.2.el7.ppc64.rpm
kernel-debuginfo-common-ppc64-3.10.0-862.20.2.el7.ppc64.rpm
kernel-devel-3.10.0-862.20.2.el7.ppc64.rpm
kernel-headers-3.10.0-862.20.2.el7.ppc64.rpm
kernel-tools-3.10.0-862.20.2.el7.ppc64.rpm
kernel-tools-debuginfo-3.10.0-862.20.2.el7.ppc64.rpm
kernel-tools-libs-3.10.0-862.20.2.el7.ppc64.rpm
perf-3.10.0-862.20.2.el7.ppc64.rpm
perf-debuginfo-3.10.0-862.20.2.el7.ppc64.rpm
python-perf-3.10.0-862.20.2.el7.ppc64.rpm
python-perf-debuginfo-3.10.0-862.20.2.el7.ppc64.rpm
ppc64le:
kernel-3.10.0-862.20.2.el7.ppc64le.rpm
kernel-bootwrapper-3.10.0-862.20.2.el7.ppc64le.rpm
kernel-debug-3.10.0-862.20.2.el7.ppc64le.rpm
kernel-debug-debuginfo-3.10.0-862.20.2.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-862.20.2.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-862.20.2.el7.ppc64le.rpm
kernel-devel-3.10.0-862.20.2.el7.ppc64le.rpm
kernel-headers-3.10.0-862.20.2.el7.ppc64le.rpm
kernel-tools-3.10.0-862.20.2.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-862.20.2.el7.ppc64le.rpm
kernel-tools-libs-3.10.0-862.20.2.el7.ppc64le.rpm
perf-3.10.0-862.20.2.el7.ppc64le.rpm
perf-debuginfo-3.10.0-862.20.2.el7.ppc64le.rpm
python-perf-3.10.0-862.20.2.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-862.20.2.el7.ppc64le.rpm
s390x:
kernel-3.10.0-862.20.2.el7.s390x.rpm
kernel-debug-3.10.0-862.20.2.el7.s390x.rpm
kernel-debug-debuginfo-3.10.0-862.20.2.el7.s390x.rpm
kernel-debug-devel-3.10.0-862.20.2.el7.s390x.rpm
kernel-debuginfo-3.10.0-862.20.2.el7.s390x.rpm
kernel-debuginfo-common-s390x-3.10.0-862.20.2.el7.s390x.rpm
kernel-devel-3.10.0-862.20.2.el7.s390x.rpm
kernel-headers-3.10.0-862.20.2.el7.s390x.rpm
kernel-kdump-3.10.0-862.20.2.el7.s390x.rpm
kernel-kdump-debuginfo-3.10.0-862.20.2.el7.s390x.rpm
kernel-kdump-devel-3.10.0-862.20.2.el7.s390x.rpm
perf-3.10.0-862.20.2.el7.s390x.rpm
perf-debuginfo-3.10.0-862.20.2.el7.s390x.rpm
python-perf-3.10.0-862.20.2.el7.s390x.rpm
python-perf-debuginfo-3.10.0-862.20.2.el7.s390x.rpm
x86_64:
kernel-3.10.0-862.20.2.el7.x86_64.rpm
kernel-debug-3.10.0-862.20.2.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-862.20.2.el7.x86_64.rpm
kernel-debug-devel-3.10.0-862.20.2.el7.x86_64.rpm
kernel-debuginfo-3.10.0-862.20.2.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-862.20.2.el7.x86_64.rpm
kernel-devel-3.10.0-862.20.2.el7.x86_64.rpm
kernel-headers-3.10.0-862.20.2.el7.x86_64.rpm
kernel-tools-3.10.0-862.20.2.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-862.20.2.el7.x86_64.rpm
kernel-tools-libs-3.10.0-862.20.2.el7.x86_64.rpm
perf-3.10.0-862.20.2.el7.x86_64.rpm
perf-debuginfo-3.10.0-862.20.2.el7.x86_64.rpm
python-perf-3.10.0-862.20.2.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-862.20.2.el7.x86_64.rpm
Red Hat Enterprise Linux Server Optional EUS (v. 7.5):
ppc64:
kernel-debug-debuginfo-3.10.0-862.20.2.el7.ppc64.rpm
kernel-debuginfo-3.10.0-862.20.2.el7.ppc64.rpm
kernel-debuginfo-common-ppc64-3.10.0-862.20.2.el7.ppc64.rpm
kernel-tools-debuginfo-3.10.0-862.20.2.el7.ppc64.rpm
kernel-tools-libs-devel-3.10.0-862.20.2.el7.ppc64.rpm
perf-debuginfo-3.10.0-862.20.2.el7.ppc64.rpm
python-perf-debuginfo-3.10.0-862.20.2.el7.ppc64.rpm
ppc64le:
kernel-debug-debuginfo-3.10.0-862.20.2.el7.ppc64le.rpm
kernel-debug-devel-3.10.0-862.20.2.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-862.20.2.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-862.20.2.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-862.20.2.el7.ppc64le.rpm
kernel-tools-libs-devel-3.10.0-862.20.2.el7.ppc64le.rpm
perf-debuginfo-3.10.0-862.20.2.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-862.20.2.el7.ppc64le.rpm
x86_64:
kernel-debug-debuginfo-3.10.0-862.20.2.el7.x86_64.rpm
kernel-debuginfo-3.10.0-862.20.2.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-862.20.2.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-862.20.2.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-862.20.2.el7.x86_64.rpm
perf-debuginfo-3.10.0-862.20.2.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-862.20.2.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-2017-18344
https://access.redhat.com/security/cve/CVE-2018-5391
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/articles/3553061
https://access.redhat.com/articles/3674801
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.
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