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                        VMware Security Advisory

Advisory ID: VMSA-2018-0012.1
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:  2018-06-28
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 6.7.0b *                None
   VC          6.5     Any     Moderate 6.5 U2b *               None
   VC          6.0     Any     Moderate 6.0 U3f *               None
   VC          5.5     Any     Moderate 5.5 U3i *               None

   ESXi        6.7     Any     Moderate ESXi670-201806401-BG *  None
                                        ESXi670-201806402-BG **
   ESXi        6.5     Any     Moderate ESXi650-201806401-BG *  None
                                        ESXi650-201806402-BG **
   ESXi        6.0     Any     Moderate ESXi600-201806401-BG *  None
                                        ESXi600-201806402-BG **
   ESXi        5.5     Any     Moderate ESXi550-201806401-BG *  None
                                        ESXi550-201806402-BG **

   Workstation 14.x    Any     Moderate 14.1.2 *                None
   Fusion      10.x    OSX     Moderate 10.1.2 *                None

   * 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.

   ** If available, these ESXi patches apply the required microcode
   updates. The included microcode updates are documented in the
   VMware Knowledge Base articles listed in the Solution section.

4. Solution

   Please review the patch/release notes for your product and
   version and verify the checksum of your downloaded file.

   vCenter Server 6.7.0b
   Downloads:

https://my.vmware.com/web/vmware/details?downloadGroup=VC670B&productId=742
&rPId=24511
   Documentation:

https://docs.vmware.com/en/VMware-vSphere/6.7/rn/vsphere-vcenter-server-670
b-release-notes.html

   vCenter Server 6.5 U2b
   Downloads:

https://my.vmware.com/web/vmware/details?downloadGroup=VC65U2B&productId=61
4&rPId=24437
   Documentation:

https://docs.vmware.com/en/VMware-vSphere/6.5/rn/vsphere-vcenter-server-65u
2b-release-notes.html

   vCenter Server 6.0 U3f
   Downloads:

https://my.vmware.com/web/vmware/details?downloadGroup=VC60U3F&productId=49
1&rPId=24398
   Documentation:

https://docs.vmware.com/en/VMware-vSphere/6.0/rn/vsphere-vcenter-server-60u
3f-release-notes.html

   vCenter Server 5.5 U3i
   Downloads:

https://my.vmware.com/web/vmware/details?downloadGroup=VC55U3I&productId=35
3&rPId=24327
   Documentation:

https://docs.vmware.com/en/VMware-vSphere/5.5/rn/vsphere-vcenter-server-55u
3i-release-notes.html

   VMware ESXi 6.7
   Downloads:
   https://my.vmware.com/group/vmware/patch
   Documentation:
   https://kb.vmware.com/kb/55920
   https://kb.vmware.com/kb/55921 (microcode)

   VMware ESXi 6.5
   Downloads:
   https://my.vmware.com/group/vmware/patch
   Documentation:
   https://kb.vmware.com/kb/55915
   https://kb.vmware.com/kb/55916 (microcode)

   VMware ESXi 6.0
   Downloads:
   https://my.vmware.com/group/vmware/patch
   Documentation:
   https://kb.vmware.com/kb/55910
   https://kb.vmware.com/kb/55911 (microcode)

   VMware ESXi 5.5
   Downloads:
   https://my.vmware.com/group/vmware/patch
   Documentation:
   https://kb.vmware.com/kb/55905
   https://kb.vmware.com/kb/55906 (microcode)

   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: VMSA-2018-0012
   Initial security advisory in conjunction with the release
   of Workstation 14.1.2 and Fusion 10.1.2 on 2018-05-21.

   2018-06-28: VMSA-2018-0012.1
   Updated security advisory in conjunction with the release of vCenter
   Server 5.5 U3i, 6.0 U3f, 6.5 U2b, 6.7.0b and ESXi 5.5 - 6.7 patches
   on 2018-06-28.

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7. Contact

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

   This Security Advisory is posted to the following lists:

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

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

   VMware Security Advisories
   https://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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