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AUSCERT External Security Bulletin Redistribution
ESB-2018.1573
VMware vSphere, Workstation and Fusion updates enable Hypervisor-Assisted
Guest Mitigations for Speculative Store
23 May 2018
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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
ESB-2018.1570
ESB-2018.1567
ESB-2018.1554
ESB-2018.1550
ESB-2018.1549
Original Bulletin:
https://www.vmware.com/security/advisories/VMSA-2018-0012.html
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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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