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Category:   Device (Embedded Server/Appliance)  >   CPU (Generic) Vendors:   Advanced Micro Devices, Arm Holdings, Intel
(Red Hat Issues Fix) Intel/AMD/ARM CPU Data Cache Race Conditions Let Local Users Read Arbitrary Virtual CPU Memory
SecurityTracker Alert ID:  1040880
SecurityTracker URL:  http://securitytracker.com/id/1040880
CVE Reference:   CVE-2017-5715, CVE-2017-5754   (Links to External Site)
Date:  May 9 2018
Impact:   Disclosure of system information
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  

Description:   Several vulnerabilities were reported in Intel, AMD, and ARM CPUs. A local user can read arbitrary virtual memory on the target CPU device.

A local user can exploit race conditions in CPU data cache processing to obtain potentially sensitive information on the target system. This can be exploited to read arbitrary virtual memory on the target system, including by a local user on a guest operating system of a virtual machine to read arbitrary memory from other guest systems, the host operating system, and the hypervisor.

In certain cases, a local user can run a specially crafted application to exploit several flaws in the CPU speculative branch instruction execution feature and leverage CPU data cache timing behavior to infer information or read information from various CPU caches.

A local user that can trigger an out-of-bounds index error in an application can read data from another process from the CPU virtual memory [CVE-2017-5753]. The eBPF interpreter or the eBPF JIT engine can be used to create vulnerable code.

A local user can run specially crafted code to cause the CPU to speculatively execute an indirect branch to leak memory contents from another process into a CPU cache and then read the contents of the cache [CVE-2017-5715].

A local user can run specially crafted code to cause the CPU to read memory from a CPU cache before an asynchronous permission check occurs [CVE-2017-5754]. AMD CPUs are reportedly not affected.

The Intel Core, Xeon, Atom, Celeron, and Pentium product lines are affected.

CPUs from AMD and ARM are also affected.

CPUs from other vendors may also affected.

The CVE-2017-5753 and CVE-2017-5715 vulnerabilities are referred to as "Spectre".

The CVE-2017-5754 vulnerability is referred to as "Meltdown".

The original advisories are available at:

https://spectreattack.com/spectre.pdf
https://meltdownattack.com/meltdown.pdf
https://googleprojectzero.blogspot.com/2018/01/reading-privileged-memory-with-side.html

Paul Kocher, Daniel Genkin, Daniel Gruss, Werner Haas, Mike Hamburg, Moritz Lipp, Stefan Mangard, Thomas Prescher, Michael Schwarz, Yuval Yarom, Anders Fogh, Jann Horn, the Google Project Zero Team, and others reported these vulnerabilities.

Impact:   A local user can view arbitrary virtual memory contents on the target CPU device [which can lead to elevated privileges on the target system].
Solution:   Red Hat has issued a fix for CVE-2017-5715 and CVE-2017-5754.

The Red Hat advisories are available at:

https://access.redhat.com/errata/RHSA-2018:1346
https://access.redhat.com/errata/RHSA-2018:1349
https://access.redhat.com/errata/RHSA-2018:1350
https://access.redhat.com/errata/RHSA-2018:1351

Vendor URL:  access.redhat.com/errata/RHSA-2018:1346 (Links to External Site)
Cause:   Access control error, State error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  6.4, 6.5, 6.6, 6.7

Message History:   This archive entry is a follow-up to the message listed below.
Jan 4 2018 Intel/AMD/ARM CPU Data Cache Race Conditions Let Local Users Read Arbitrary Virtual CPU Memory



 Source Message Contents

Subject:  [RHSA-2018:1346-01] Important: kernel security and bug fix update

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

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

Synopsis:          Important: kernel security and bug fix update
Advisory ID:       RHSA-2018:1346-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2018:1346
Issue date:        2018-05-08
CVE Names:         CVE-2018-8897 
=====================================================================

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):

* hw: cpu: speculative execution permission faults handling (CVE-2017-5754)

* Kernel: error in exception handling leads to DoS (CVE-2018-8897)

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 Google Project Zero for reporting CVE-2017-5754
and Nick Peterson (Everdox Tech LLC) and Andy Lutomirski for reporting
CVE-2018-8897.

Bug Fix(es):

* The kernel build requirements have been updated to the GNU Compiler
Collection (GCC) compiler version that has the support for Retpolines. The
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. (BZ#1554253)

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/):

1519781 - CVE-2017-5754 hw: cpu: speculative execution permission faults handling
1567074 - CVE-2018-8897 Kernel: error in exception handling leads to DoS

6. Package List:

Red Hat Enterprise Linux HPC Node EUS (v. 6.7):

Source:
kernel-2.6.32-573.55.2.el6.src.rpm

noarch:
kernel-abi-whitelists-2.6.32-573.55.2.el6.noarch.rpm
kernel-doc-2.6.32-573.55.2.el6.noarch.rpm
kernel-firmware-2.6.32-573.55.2.el6.noarch.rpm

x86_64:
kernel-2.6.32-573.55.2.el6.x86_64.rpm
kernel-debug-2.6.32-573.55.2.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-573.55.2.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-573.55.2.el6.x86_64.rpm
kernel-debug-devel-2.6.32-573.55.2.el6.i686.rpm
kernel-debug-devel-2.6.32-573.55.2.el6.x86_64.rpm
kernel-debuginfo-2.6.32-573.55.2.el6.i686.rpm
kernel-debuginfo-2.6.32-573.55.2.el6.x86_64.rpm
kernel-debuginfo-common-i686-2.6.32-573.55.2.el6.i686.rpm
kernel-debuginfo-common-x86_64-2.6.32-573.55.2.el6.x86_64.rpm
kernel-devel-2.6.32-573.55.2.el6.x86_64.rpm
kernel-headers-2.6.32-573.55.2.el6.x86_64.rpm
perf-2.6.32-573.55.2.el6.x86_64.rpm
perf-debuginfo-2.6.32-573.55.2.el6.i686.rpm
perf-debuginfo-2.6.32-573.55.2.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-573.55.2.el6.i686.rpm
python-perf-debuginfo-2.6.32-573.55.2.el6.x86_64.rpm

Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.7):

x86_64:
kernel-debug-debuginfo-2.6.32-573.55.2.el6.x86_64.rpm
kernel-debuginfo-2.6.32-573.55.2.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-573.55.2.el6.x86_64.rpm
perf-debuginfo-2.6.32-573.55.2.el6.x86_64.rpm
python-perf-2.6.32-573.55.2.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-573.55.2.el6.x86_64.rpm

Red Hat Enterprise Linux Server EUS (v. 6.7):

Source:
kernel-2.6.32-573.55.2.el6.src.rpm

i386:
kernel-2.6.32-573.55.2.el6.i686.rpm
kernel-debug-2.6.32-573.55.2.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-573.55.2.el6.i686.rpm
kernel-debug-devel-2.6.32-573.55.2.el6.i686.rpm
kernel-debuginfo-2.6.32-573.55.2.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-573.55.2.el6.i686.rpm
kernel-devel-2.6.32-573.55.2.el6.i686.rpm
kernel-headers-2.6.32-573.55.2.el6.i686.rpm
perf-2.6.32-573.55.2.el6.i686.rpm
perf-debuginfo-2.6.32-573.55.2.el6.i686.rpm
python-perf-debuginfo-2.6.32-573.55.2.el6.i686.rpm

noarch:
kernel-abi-whitelists-2.6.32-573.55.2.el6.noarch.rpm
kernel-doc-2.6.32-573.55.2.el6.noarch.rpm
kernel-firmware-2.6.32-573.55.2.el6.noarch.rpm

ppc64:
kernel-2.6.32-573.55.2.el6.ppc64.rpm
kernel-bootwrapper-2.6.32-573.55.2.el6.ppc64.rpm
kernel-debug-2.6.32-573.55.2.el6.ppc64.rpm
kernel-debug-debuginfo-2.6.32-573.55.2.el6.ppc64.rpm
kernel-debug-devel-2.6.32-573.55.2.el6.ppc64.rpm
kernel-debuginfo-2.6.32-573.55.2.el6.ppc64.rpm
kernel-debuginfo-common-ppc64-2.6.32-573.55.2.el6.ppc64.rpm
kernel-devel-2.6.32-573.55.2.el6.ppc64.rpm
kernel-headers-2.6.32-573.55.2.el6.ppc64.rpm
perf-2.6.32-573.55.2.el6.ppc64.rpm
perf-debuginfo-2.6.32-573.55.2.el6.ppc64.rpm
python-perf-debuginfo-2.6.32-573.55.2.el6.ppc64.rpm

s390x:
kernel-2.6.32-573.55.2.el6.s390x.rpm
kernel-debug-2.6.32-573.55.2.el6.s390x.rpm
kernel-debug-debuginfo-2.6.32-573.55.2.el6.s390x.rpm
kernel-debug-devel-2.6.32-573.55.2.el6.s390x.rpm
kernel-debuginfo-2.6.32-573.55.2.el6.s390x.rpm
kernel-debuginfo-common-s390x-2.6.32-573.55.2.el6.s390x.rpm
kernel-devel-2.6.32-573.55.2.el6.s390x.rpm
kernel-headers-2.6.32-573.55.2.el6.s390x.rpm
kernel-kdump-2.6.32-573.55.2.el6.s390x.rpm
kernel-kdump-debuginfo-2.6.32-573.55.2.el6.s390x.rpm
kernel-kdump-devel-2.6.32-573.55.2.el6.s390x.rpm
perf-2.6.32-573.55.2.el6.s390x.rpm
perf-debuginfo-2.6.32-573.55.2.el6.s390x.rpm
python-perf-debuginfo-2.6.32-573.55.2.el6.s390x.rpm

x86_64:
kernel-2.6.32-573.55.2.el6.x86_64.rpm
kernel-debug-2.6.32-573.55.2.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-573.55.2.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-573.55.2.el6.x86_64.rpm
kernel-debug-devel-2.6.32-573.55.2.el6.i686.rpm
kernel-debug-devel-2.6.32-573.55.2.el6.x86_64.rpm
kernel-debuginfo-2.6.32-573.55.2.el6.i686.rpm
kernel-debuginfo-2.6.32-573.55.2.el6.x86_64.rpm
kernel-debuginfo-common-i686-2.6.32-573.55.2.el6.i686.rpm
kernel-debuginfo-common-x86_64-2.6.32-573.55.2.el6.x86_64.rpm
kernel-devel-2.6.32-573.55.2.el6.x86_64.rpm
kernel-headers-2.6.32-573.55.2.el6.x86_64.rpm
perf-2.6.32-573.55.2.el6.x86_64.rpm
perf-debuginfo-2.6.32-573.55.2.el6.i686.rpm
perf-debuginfo-2.6.32-573.55.2.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-573.55.2.el6.i686.rpm
python-perf-debuginfo-2.6.32-573.55.2.el6.x86_64.rpm

Red Hat Enterprise Linux Server Optional EUS (v. 6.7):

i386:
kernel-debug-debuginfo-2.6.32-573.55.2.el6.i686.rpm
kernel-debuginfo-2.6.32-573.55.2.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-573.55.2.el6.i686.rpm
perf-debuginfo-2.6.32-573.55.2.el6.i686.rpm
python-perf-2.6.32-573.55.2.el6.i686.rpm
python-perf-debuginfo-2.6.32-573.55.2.el6.i686.rpm

ppc64:
kernel-debug-debuginfo-2.6.32-573.55.2.el6.ppc64.rpm
kernel-debuginfo-2.6.32-573.55.2.el6.ppc64.rpm
kernel-debuginfo-common-ppc64-2.6.32-573.55.2.el6.ppc64.rpm
perf-debuginfo-2.6.32-573.55.2.el6.ppc64.rpm
python-perf-2.6.32-573.55.2.el6.ppc64.rpm
python-perf-debuginfo-2.6.32-573.55.2.el6.ppc64.rpm

s390x:
kernel-debug-debuginfo-2.6.32-573.55.2.el6.s390x.rpm
kernel-debuginfo-2.6.32-573.55.2.el6.s390x.rpm
kernel-debuginfo-common-s390x-2.6.32-573.55.2.el6.s390x.rpm
kernel-kdump-debuginfo-2.6.32-573.55.2.el6.s390x.rpm
perf-debuginfo-2.6.32-573.55.2.el6.s390x.rpm
python-perf-2.6.32-573.55.2.el6.s390x.rpm
python-perf-debuginfo-2.6.32-573.55.2.el6.s390x.rpm

x86_64:
kernel-debug-debuginfo-2.6.32-573.55.2.el6.x86_64.rpm
kernel-debuginfo-2.6.32-573.55.2.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-573.55.2.el6.x86_64.rpm
perf-debuginfo-2.6.32-573.55.2.el6.x86_64.rpm
python-perf-2.6.32-573.55.2.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-573.55.2.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-2018-8897
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/security/cve/CVE-2017-5754

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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