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Red Hat Security Advisory 2018-0015-01

Red Hat Security Advisory 2018-0015-01
Posted Jan 4, 2018
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2018-0015-01 - The linux-firmware packages contain all of the firmware files that are required by various devices to operate. Security Fix: An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of instructions. 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. 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.

tags | advisory
systems | linux, redhat
MD5 | 50541f84a1810060be225dc2342f0b24

Red Hat Security Advisory 2018-0015-01

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=====================================================================
Red Hat Security Advisory

Synopsis: Important: linux-firmware security update
Advisory ID: RHSA-2018:0015-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2018:0015
Issue date: 2018-01-04
=====================================================================

1. Summary:

An update for linux-firmware is now available for Red Hat Enterprise Linux
7.3 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. 7.3) - noarch
Red Hat Enterprise Linux Server EUS (v. 7.3) - noarch

3. Description:

The linux-firmware packages contain all of the firmware files that are
required by various devices to operate.

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)

Note: This is the microcode counterpart of the CVE-2017-5715 kernel
mitigation.

Red Hat would like to thank Google Project Zero 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

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 ComputeNode EUS (v. 7.3):

Source:
linux-firmware-20160830-50.git7534e19.el7_3.src.rpm

noarch:
iwl100-firmware-39.31.5.1-50.el7_3.noarch.rpm
iwl1000-firmware-39.31.5.1-50.el7_3.noarch.rpm
iwl105-firmware-18.168.6.1-50.el7_3.noarch.rpm
iwl135-firmware-18.168.6.1-50.el7_3.noarch.rpm
iwl2000-firmware-18.168.6.1-50.el7_3.noarch.rpm
iwl2030-firmware-18.168.6.1-50.el7_3.noarch.rpm
iwl3160-firmware-22.0.7.0-50.el7_3.noarch.rpm
iwl3945-firmware-15.32.2.9-50.el7_3.noarch.rpm
iwl4965-firmware-228.61.2.24-50.el7_3.noarch.rpm
iwl5000-firmware-8.83.5.1_1-50.el7_3.noarch.rpm
iwl5150-firmware-8.24.2.2-50.el7_3.noarch.rpm
iwl6000-firmware-9.221.4.1-50.el7_3.noarch.rpm
iwl6000g2a-firmware-17.168.5.3-50.el7_3.noarch.rpm
iwl6000g2b-firmware-17.168.5.2-50.el7_3.noarch.rpm
iwl6050-firmware-41.28.5.1-50.el7_3.noarch.rpm
iwl7260-firmware-22.0.7.0-50.el7_3.noarch.rpm
iwl7265-firmware-22.0.7.0-50.el7_3.noarch.rpm
linux-firmware-20160830-50.git7534e19.el7_3.noarch.rpm

Red Hat Enterprise Linux Server EUS (v. 7.3):

Source:
linux-firmware-20160830-50.git7534e19.el7_3.src.rpm

noarch:
iwl100-firmware-39.31.5.1-50.el7_3.noarch.rpm
iwl1000-firmware-39.31.5.1-50.el7_3.noarch.rpm
iwl105-firmware-18.168.6.1-50.el7_3.noarch.rpm
iwl135-firmware-18.168.6.1-50.el7_3.noarch.rpm
iwl2000-firmware-18.168.6.1-50.el7_3.noarch.rpm
iwl2030-firmware-18.168.6.1-50.el7_3.noarch.rpm
iwl3160-firmware-22.0.7.0-50.el7_3.noarch.rpm
iwl3945-firmware-15.32.2.9-50.el7_3.noarch.rpm
iwl4965-firmware-228.61.2.24-50.el7_3.noarch.rpm
iwl5000-firmware-8.83.5.1_1-50.el7_3.noarch.rpm
iwl5150-firmware-8.24.2.2-50.el7_3.noarch.rpm
iwl6000-firmware-9.221.4.1-50.el7_3.noarch.rpm
iwl6000g2a-firmware-17.168.5.3-50.el7_3.noarch.rpm
iwl6000g2b-firmware-17.168.5.2-50.el7_3.noarch.rpm
iwl6050-firmware-41.28.5.1-50.el7_3.noarch.rpm
iwl7260-firmware-22.0.7.0-50.el7_3.noarch.rpm
iwl7265-firmware-22.0.7.0-50.el7_3.noarch.rpm
linux-firmware-20160830-50.git7534e19.el7_3.noarch.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.
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