Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-2018.2623
Important: kernel security update
5 September 2018
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: linux kernel
Publisher: Red Hat
Operating System: Red Hat Enterprise Linux Server 6
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2018-5390
Reference: ESB-2018.2612
ESB-2018.2380
ESB-2018.2369
ESB-2018.2361
Original Bulletin:
https://access.redhat.com/errata/RHSA-2018:2645
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Red Hat Security Advisory
Synopsis: Important: kernel security update
Advisory ID: RHSA-2018:2645-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2018:2645
Issue date: 2018-09-04
CVE Names: CVE-2018-5390
=====================================================================
1. Summary:
An update for kernel is now available for Red Hat Enterprise Linux 6.7
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 HPC Node EUS (v. 6.7) - noarch, x86_64
Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.7) - x86_64
Red Hat Enterprise Linux Server EUS (v. 6.7) - i386, noarch, ppc64, s390x, x86_64
Red Hat Enterprise Linux Server Optional EUS (v. 6.7) - i386, ppc64, s390x, x86_64
3. Description:
The kernel packages contain the Linux kernel, the core of any Linux
operating system.
Security Fix(es):
* A flaw named SegmentSmack was found in the way the Linux kernel handled
specially crafted TCP packets. A remote attacker could use this flaw to
trigger time and calculation expensive calls to tcp_collapse_ofo_queue()
and tcp_prune_ofo_queue() functions by sending specially modified packets
within ongoing TCP sessions which could lead to a CPU saturation and hence
a denial of service on the system. Maintaining the denial of service
condition requires continuous two-way TCP sessions to a reachable open
port, thus the attacks cannot be performed using spoofed IP addresses.
(CVE-2018-5390)
Red Hat would like to thank Juha-Matti Tilli (Aalto University, Department
of Communications and Networking and Nokia Bell Labs) for reporting this
issue.
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/):
1601704 - CVE-2018-5390 kernel: TCP segments with random offsets allow a remote denial of service (SegmentSmack)
6. Package List:
Red Hat Enterprise Linux HPC Node EUS (v. 6.7):
Source:
kernel-2.6.32-573.62.1.el6.src.rpm
noarch:
kernel-abi-whitelists-2.6.32-573.62.1.el6.noarch.rpm
kernel-doc-2.6.32-573.62.1.el6.noarch.rpm
kernel-firmware-2.6.32-573.62.1.el6.noarch.rpm
x86_64:
kernel-2.6.32-573.62.1.el6.x86_64.rpm
kernel-debug-2.6.32-573.62.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-573.62.1.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-573.62.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-573.62.1.el6.i686.rpm
kernel-debug-devel-2.6.32-573.62.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-573.62.1.el6.i686.rpm
kernel-debuginfo-2.6.32-573.62.1.el6.x86_64.rpm
kernel-debuginfo-common-i686-2.6.32-573.62.1.el6.i686.rpm
kernel-debuginfo-common-x86_64-2.6.32-573.62.1.el6.x86_64.rpm
kernel-devel-2.6.32-573.62.1.el6.x86_64.rpm
kernel-headers-2.6.32-573.62.1.el6.x86_64.rpm
perf-2.6.32-573.62.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-573.62.1.el6.i686.rpm
perf-debuginfo-2.6.32-573.62.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-573.62.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-573.62.1.el6.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.7):
x86_64:
kernel-debug-debuginfo-2.6.32-573.62.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-573.62.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-573.62.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-573.62.1.el6.x86_64.rpm
python-perf-2.6.32-573.62.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-573.62.1.el6.x86_64.rpm
Red Hat Enterprise Linux Server EUS (v. 6.7):
Source:
kernel-2.6.32-573.62.1.el6.src.rpm
i386:
kernel-2.6.32-573.62.1.el6.i686.rpm
kernel-debug-2.6.32-573.62.1.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-573.62.1.el6.i686.rpm
kernel-debug-devel-2.6.32-573.62.1.el6.i686.rpm
kernel-debuginfo-2.6.32-573.62.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-573.62.1.el6.i686.rpm
kernel-devel-2.6.32-573.62.1.el6.i686.rpm
kernel-headers-2.6.32-573.62.1.el6.i686.rpm
perf-2.6.32-573.62.1.el6.i686.rpm
perf-debuginfo-2.6.32-573.62.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-573.62.1.el6.i686.rpm
noarch:
kernel-abi-whitelists-2.6.32-573.62.1.el6.noarch.rpm
kernel-doc-2.6.32-573.62.1.el6.noarch.rpm
kernel-firmware-2.6.32-573.62.1.el6.noarch.rpm
ppc64:
kernel-2.6.32-573.62.1.el6.ppc64.rpm
kernel-bootwrapper-2.6.32-573.62.1.el6.ppc64.rpm
kernel-debug-2.6.32-573.62.1.el6.ppc64.rpm
kernel-debug-debuginfo-2.6.32-573.62.1.el6.ppc64.rpm
kernel-debug-devel-2.6.32-573.62.1.el6.ppc64.rpm
kernel-debuginfo-2.6.32-573.62.1.el6.ppc64.rpm
kernel-debuginfo-common-ppc64-2.6.32-573.62.1.el6.ppc64.rpm
kernel-devel-2.6.32-573.62.1.el6.ppc64.rpm
kernel-headers-2.6.32-573.62.1.el6.ppc64.rpm
perf-2.6.32-573.62.1.el6.ppc64.rpm
perf-debuginfo-2.6.32-573.62.1.el6.ppc64.rpm
python-perf-debuginfo-2.6.32-573.62.1.el6.ppc64.rpm
s390x:
kernel-2.6.32-573.62.1.el6.s390x.rpm
kernel-debug-2.6.32-573.62.1.el6.s390x.rpm
kernel-debug-debuginfo-2.6.32-573.62.1.el6.s390x.rpm
kernel-debug-devel-2.6.32-573.62.1.el6.s390x.rpm
kernel-debuginfo-2.6.32-573.62.1.el6.s390x.rpm
kernel-debuginfo-common-s390x-2.6.32-573.62.1.el6.s390x.rpm
kernel-devel-2.6.32-573.62.1.el6.s390x.rpm
kernel-headers-2.6.32-573.62.1.el6.s390x.rpm
kernel-kdump-2.6.32-573.62.1.el6.s390x.rpm
kernel-kdump-debuginfo-2.6.32-573.62.1.el6.s390x.rpm
kernel-kdump-devel-2.6.32-573.62.1.el6.s390x.rpm
perf-2.6.32-573.62.1.el6.s390x.rpm
perf-debuginfo-2.6.32-573.62.1.el6.s390x.rpm
python-perf-debuginfo-2.6.32-573.62.1.el6.s390x.rpm
x86_64:
kernel-2.6.32-573.62.1.el6.x86_64.rpm
kernel-debug-2.6.32-573.62.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-573.62.1.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-573.62.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-573.62.1.el6.i686.rpm
kernel-debug-devel-2.6.32-573.62.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-573.62.1.el6.i686.rpm
kernel-debuginfo-2.6.32-573.62.1.el6.x86_64.rpm
kernel-debuginfo-common-i686-2.6.32-573.62.1.el6.i686.rpm
kernel-debuginfo-common-x86_64-2.6.32-573.62.1.el6.x86_64.rpm
kernel-devel-2.6.32-573.62.1.el6.x86_64.rpm
kernel-headers-2.6.32-573.62.1.el6.x86_64.rpm
perf-2.6.32-573.62.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-573.62.1.el6.i686.rpm
perf-debuginfo-2.6.32-573.62.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-573.62.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-573.62.1.el6.x86_64.rpm
Red Hat Enterprise Linux Server Optional EUS (v. 6.7):
i386:
kernel-debug-debuginfo-2.6.32-573.62.1.el6.i686.rpm
kernel-debuginfo-2.6.32-573.62.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-573.62.1.el6.i686.rpm
perf-debuginfo-2.6.32-573.62.1.el6.i686.rpm
python-perf-2.6.32-573.62.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-573.62.1.el6.i686.rpm
ppc64:
kernel-debug-debuginfo-2.6.32-573.62.1.el6.ppc64.rpm
kernel-debuginfo-2.6.32-573.62.1.el6.ppc64.rpm
kernel-debuginfo-common-ppc64-2.6.32-573.62.1.el6.ppc64.rpm
perf-debuginfo-2.6.32-573.62.1.el6.ppc64.rpm
python-perf-2.6.32-573.62.1.el6.ppc64.rpm
python-perf-debuginfo-2.6.32-573.62.1.el6.ppc64.rpm
s390x:
kernel-debug-debuginfo-2.6.32-573.62.1.el6.s390x.rpm
kernel-debuginfo-2.6.32-573.62.1.el6.s390x.rpm
kernel-debuginfo-common-s390x-2.6.32-573.62.1.el6.s390x.rpm
kernel-kdump-debuginfo-2.6.32-573.62.1.el6.s390x.rpm
perf-debuginfo-2.6.32-573.62.1.el6.s390x.rpm
python-perf-2.6.32-573.62.1.el6.s390x.rpm
python-perf-debuginfo-2.6.32-573.62.1.el6.s390x.rpm
x86_64:
kernel-debug-debuginfo-2.6.32-573.62.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-573.62.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-573.62.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-573.62.1.el6.x86_64.rpm
python-perf-2.6.32-573.62.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-573.62.1.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-2018-5390
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/security/cve/cve-2018-5390
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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