Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2018.1250
Important: kernel security and bug fix update
24 April 2018
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: kernel
Publisher: Red Hat
Operating System: Red Hat Enterprise Linux Server 5
Impact/Access: Access Privileged Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2017-5715
Reference: ASB-2018.0009
ASB-2018.0002.4
ESB-2018.0044
ESB-2018.0042.2
Original Bulletin:
https://access.redhat.com/errata/RHSA-2018:1196
- --------------------------BEGIN INCLUDED TEXT--------------------
- -----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
=====================================================================
Red Hat Security Advisory
Synopsis: Important: kernel security and bug fix update
Advisory ID: RHSA-2018:1196-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2018:1196
Issue date: 2018-04-23
=====================================================================
1. Summary:
An update for kernel is now available for Red Hat Enterprise Linux 5
Extended Lifecycle 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 Server (v. 5 ELS) - i386, noarch, s390x, x86_64
3. Description:
The kernel packages contain the Linux kernel, the core of any Linux
operating system.
Security Fix(es):
* An industry-wide issue was found in the way many modern microprocessor
designs have implemented speculative execution of instructions (a commonly
used performance optimization). There are three primary variants of the
issue which differ in the way the speculative execution can be exploited.
Variant CVE-2017-5715 triggers the speculative execution by utilizing
branch target injection. It relies on the presence of a precisely-defined
instruction sequence in the privileged code as well as the fact that memory
accesses may cause allocation into the microprocessor's data cache even for
speculatively executed instructions that never actually commit (retire). As
a result, an unprivileged attacker could use this flaw to cross the syscall
and guest/host boundaries and read privileged memory by conducting targeted
cache side-channel attacks. (CVE-2017-5715, Important, x86-64)
Red Hat would like to thank Google Project Zero for reporting this issue.
Bug Fix(es):
* The Return Trampolines (Retpolines) mechanism is a software construct
that leverages specific knowledge of the underlying hardware to mitigate
the branch target injection, also known as Spectre variant 2 vulnerability
described in CVE-2017-5715. With this update, the support for Retpolines
has been implemented into the Red Hat Enterprise Linux kernel. (BZ#1535650)
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/):
1519780 - CVE-2017-5715 hw: cpu: speculative execution branch target injection
6. Package List:
Red Hat Enterprise Linux Server (v. 5 ELS):
Source:
kernel-2.6.18-430.el5.src.rpm
i386:
kernel-2.6.18-430.el5.i686.rpm
kernel-PAE-2.6.18-430.el5.i686.rpm
kernel-PAE-debuginfo-2.6.18-430.el5.i686.rpm
kernel-PAE-devel-2.6.18-430.el5.i686.rpm
kernel-debug-2.6.18-430.el5.i686.rpm
kernel-debug-debuginfo-2.6.18-430.el5.i686.rpm
kernel-debug-devel-2.6.18-430.el5.i686.rpm
kernel-debuginfo-2.6.18-430.el5.i686.rpm
kernel-debuginfo-common-2.6.18-430.el5.i686.rpm
kernel-devel-2.6.18-430.el5.i686.rpm
kernel-headers-2.6.18-430.el5.i386.rpm
kernel-xen-2.6.18-430.el5.i686.rpm
kernel-xen-debuginfo-2.6.18-430.el5.i686.rpm
kernel-xen-devel-2.6.18-430.el5.i686.rpm
noarch:
kernel-doc-2.6.18-430.el5.noarch.rpm
s390x:
kernel-2.6.18-430.el5.s390x.rpm
kernel-debug-2.6.18-430.el5.s390x.rpm
kernel-debug-debuginfo-2.6.18-430.el5.s390x.rpm
kernel-debug-devel-2.6.18-430.el5.s390x.rpm
kernel-debuginfo-2.6.18-430.el5.s390x.rpm
kernel-debuginfo-common-2.6.18-430.el5.s390x.rpm
kernel-devel-2.6.18-430.el5.s390x.rpm
kernel-headers-2.6.18-430.el5.s390x.rpm
kernel-kdump-2.6.18-430.el5.s390x.rpm
kernel-kdump-debuginfo-2.6.18-430.el5.s390x.rpm
kernel-kdump-devel-2.6.18-430.el5.s390x.rpm
x86_64:
kernel-2.6.18-430.el5.x86_64.rpm
kernel-debug-2.6.18-430.el5.x86_64.rpm
kernel-debug-debuginfo-2.6.18-430.el5.x86_64.rpm
kernel-debug-devel-2.6.18-430.el5.x86_64.rpm
kernel-debuginfo-2.6.18-430.el5.x86_64.rpm
kernel-debuginfo-common-2.6.18-430.el5.x86_64.rpm
kernel-devel-2.6.18-430.el5.x86_64.rpm
kernel-headers-2.6.18-430.el5.x86_64.rpm
kernel-xen-2.6.18-430.el5.x86_64.rpm
kernel-xen-debuginfo-2.6.18-430.el5.x86_64.rpm
kernel-xen-devel-2.6.18-430.el5.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/updates/classification/#important
https://access.redhat.com/security/vulnerabilities/speculativeexecution
https://access.redhat.com/security/cve/CVE-2017-5715
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
iD8DBQFa3diYXlSAg2UNWIIRAnhWAJ9opNY+30BvfMhP0Do53kZ8IIrcswCeILeI
iZ7xSHUxGx0i8+Qz6b9Y6zc=
=F706
- -----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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=bLLV
-----END PGP SIGNATURE-----