ESB-2018.2623 - [RedHat] linux kernel: Denial of service - Remote/unauthenticated 2018-09-05

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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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