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                        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 (cve.mitre.org) 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
   available.

   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:
   https://www.vmware.com/go/downloadworkstation
   https://www.vmware.com/go/downloadplayer

   VMware Fusion Pro / Fusion 10.1.2
   Downloads and Documentation:  
   https://www.vmware.com/go/downloadfusion

5. References

   https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-3639
   https://kb.vmware.com/kb/54951
   https://kb.vmware.com/kb/55111

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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.

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7. Contact

   E-mail list for product security notifications and announcements:
   http://lists.vmware.com/cgi-bin/mailman/listinfo/security-announce

   This Security Advisory is posted to the following lists:

    security-announce@lists.vmware.com
    bugtraq@securityfocus.com
    fulldisclosure@seclists.org

   E-mail: security at vmware.com
   PGP key at: https://kb.vmware.com/kb/1055

   VMware Security Advisories
   http://www.vmware.com/security/advisories

   VMware Security Response Policy
   https://www.vmware.com/support/policies/security_response.html

   VMware Lifecycle Support Phases
   https://www.vmware.com/support/policies/lifecycle.html
 
   VMware Security & Compliance Blog   
   https://blogs.vmware.com/security

   Twitter
   https://twitter.com/VMwareSRC

   Copyright 2018 VMware Inc. All rights reserved.
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