ESB-2018.1573 - [Win][UNIX/Linux] VMware vCenter Server (VC), VMware vSphere ESXi (ESXi), VMware Fusion Pro, and VMware Workstation Pro: Access privileged data - Existing account 2018-05-23

Printable version
PGP/GPG verifiable version

Hash: SHA256

             AUSCERT External Security Bulletin Redistribution

 VMware vSphere, Workstation and Fusion updates enable Hypervisor-Assisted
                  Guest Mitigations for Speculative Store
                                23 May 2018


        AusCERT Security Bulletin Summary

Product:           VMware vCenter Server (VC)
                   VMware vSphere ESXi (ESXi)
                   VMware Fusion Pro
                   VMware Workstation Pro
Publisher:         VMWare
Operating System:  Windows
                   UNIX variants (UNIX, Linux, OSX)
Impact/Access:     Access Privileged Data -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-3640 CVE-2018-3639 

Reference:         ASB-2018.0121

Original Bulletin:

- --------------------------BEGIN INCLUDED TEXT--------------------

Hash: SHA1

- - ------------------------------------------------------------------------
                        VMware Security Advisory

Advisory ID: VMSA-2018-0012
Severity:    Moderate
Synopsis:    VMware vSphere, Workstation and Fusion updates enable
             Hypervisor-Assisted Guest Mitigations for Speculative Store
             Bypass issue.
Issue date:  2018-05-21
Updated on:  2018-05-21 (Initial Advisory)
CVE number:  CVE-2018-3639

1. Summary

   VMware vSphere, Workstation and Fusion updates enable Hypervisor-
   Assisted Guest Mitigations for Speculative Store Bypass issue.

   The mitigations in this advisory are categorized as Hypervisor
   Assisted Guest Mitigations described by VMware Knowledge Base article
   54951. KB54951 also covers CVE-2018-3640 mitigations which do not
   require VMware product updates.

2. Relevant Products

   VMware vCenter Server (VC)
   VMware vSphere ESXi (ESXi)
   VMware Workstation Pro / Player (Workstation)
   VMware Fusion Pro / Fusion (Fusion)

3. Problem Description

   vCenter Server, ESXi, Workstation, and Fusion update speculative
   execution control mechanism for Virtual Machines (VMs). As a result,
   a patched Guest Operating System (GOS) can remediate the Speculative
   Store bypass issue (CVE-2018-3639) using the Speculative-Store-
   Bypass-Disable (SSBD) control bit. This issue may allow for
   information disclosure in applications and/or execution runtimes
   which rely on managed code security mechanisms. Based on current
   evaluations, we do not believe that CVE-2018-3639 could allow for VM
   to VM or Hypervisor to VM Information disclosure.

   The Common Vulnerabilities and Exposures project ( has
   assigned the identifier CVE-2018-3639 to this issue.

   Column 5 of the following table lists the action required to
   remediate the vulnerability in each release, if a solution is

   VMware      Product   Running           Replace with/     Mitigation/
   Product     Version   on      Severity  Apply Patch       Workaround
   =========== ========= ======= ========= ================= ==========
   VC          6.7       Any     Moderate  Patch Pending*    None
   VC          6.5       Any     Moderate  Patch Pending*    None
   VC          6.0       Any     Moderate  Patch Pending*    None
   VC          5.5       Any     Moderate  Patch Pending*    None

   ESXi        6.7       Any     Moderate  Patch Pending*    None
   ESXi        6.5       Any     Moderate  Patch Pending*    None
   ESXi        6.0       Any     Moderate  Patch Pending*    None
   ESXi        5.5       Any     Moderate  Patch Pending*    None

   Workstation 14.x      Any     Moderate  14.1.2**          None

   Fusion      10.x      Any     Moderate  10.1.2**          None

   *These updates are on hold until Intel has released updated microcode
   which has been tested by VMware.

   **There are additional VMware and 3rd party requirements for
   CVE-2018-3639 mitigation beyond applying these updates. Please see
   VMware Knowledge Base Article 55111 for details.

4. Solution

   VMware Workstation Pro, Player 14.1.2
   Downloads and Documentation:

   VMware Fusion Pro / Fusion 10.1.2
   Downloads and Documentation:

5. References

- - ------------------------------------------------------------------------

6. Change log

   2018-05-21: Initial security advisory in conjunction with the release
   of Workstation 14.1.2 and Fusion 10.1.2 on 2018-05-21.

- - ------------------------------------------------------------------------

7. Contact

   E-mail list for product security notifications and announcements:

   This Security Advisory is posted to the following lists:

   E-mail: security at
   PGP key at:

   VMware Security Advisories

   VMware Security Response Policy

   VMware Lifecycle Support Phases
   VMware Security & Compliance Blog


   Copyright 2018 VMware Inc. All rights reserved.


- --------------------------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
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:

Australian Computer Emergency Response Team
The University of Queensland
Qld 4072

Internet Email:
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.


« Back to bulletins