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VMware Security Advisory
Advisory ID: VMSA-2016-0001
Synopsis: VMware ESXi, Workstation, Player, and Fusion updates
address important guest privilege escalation vulnerability
Issue date: 2016-01-07
Updated on: 2016-01-07 (Initial Advisory)
CVE number: CVE-2015-6933
1. Summary
VMware ESXi, Fusion, Player, and Workstation updates address
important guest privilege escalation vulnerability
2. Relevant Releases
VMware ESXi 6.0 without patch ESXi600-201512102-SG
VMware ESXi 5.5 without patch ESXi550-201512102-SG
VMware ESXi 5.1 without patch ESXi510-201510102-SG
VMware ESXi 5.0 without patch ESXi500-201510102-SG
VMware Workstation prior to 11.1.2
VMware Player prior to 7.1.2
VMWare Fusion prior to 7.1.2
3. Problem Description
Important Windows-based guest privilege escalation in VMware Tools
A kernel memory corruption vulnerability is present in the VMware Tools
"Shared Folders" (HGFS) feature running on Microsoft Windows. Successful
exploitation of this issue could lead to an escalation of privilege in
the guest operating system.
VMware would like to thank Dmitry Janushkevich from the Secunia
Research Team for reporting this issue to us.
Note: This vulnerability does not allow for privilege escalation from
the guest operating system to the host. Host memory can not be
manipulated from the guest operating system by exploiting this flaw.
The Common Vulnerabilities and Exposures project (cve.mitre.org) has
assigned the identifier CVE-2015-6933 to this issue.
Workarounds
Removing the "Shared Folders" (HGFS) feature from previously installed
VMware Tools will remove the possibility of exploitation.
Column 4 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/
Product Version on Apply Patch *
============= ======= ======= =================
VMware ESXi 6.0 ESXi
ESXi600-201512102-SG**
VMware ESXi 5.5 ESXi
ESXi550-201512102-SG**
VMware ESXi 5.1 ESXi
ESXi510-201510102-SG**
VMware ESXi 5.0 ESXi
ESXi500-201510102-SG**
VMware Workstation 12.x.x Any not affected
VMware Workstation 11.x.x Any 11.1.2
VMware Player 8.x.x Any not affected
VMware Player 7.x.x Any 7.1.2
VMware Fusion 8.x.x OSX not affected
VMware Fusion 7.x.x OSX 7.1.2
*After the update or patch is applied, VMware Tools must also
be updated in any Windows-based guests that include the "Shared Folders"
(HGFS) feature to resolve CVE-2015-6933.
**VMware Tools installations initiated via vSphere (ESXi/vCenter) do not
include the affected "Shared Folders" (HGFS) feature unless a
"Complete" feature set was specified during the initial installation.
4. Solution
Please review the patch/release notes for your product and
version and verify the checksum of your downloaded file.
VMware ESXi 6.0
Downloads:
https://www.vmware.com/patchmgr/findPatch.portal
Documentation:
http://kb.vmware.com/kb/2135123
VMware ESXi 5.5
Downloads:
https://www.vmware.com/patchmgr/findPatch.portal
Documentation:
http://kb.vmware.com/kb/2135796
VMware ESXi 5.1
Downloads:
https://www.vmware.com/patchmgr/findPatch.portal
Documentation:
http://kb.vmware.com/kb/2126488
VMware ESXi 5.0
Downloads:
https://www.vmware.com/patchmgr/findPatch.portal
Documentation:
http://kb.vmware.com/kb/2120210
VMware Workstation 11.1.2
Downloads and Documentation:
https://www.vmware.com/go/downloadworkstation
VMware Player 7.1.2
Downloads and Documentation:
https://www.vmware.com/go/downloadplayer
VMware Fusion 7.1.2
https://www.vmware.com/go/downloadfusion
5. References
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-6933
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6. Change log
2016-01-07 VMSA-2016-0001 Initial security advisory in conjunction
with the release of VMware ESXi 6.0 patches on 2016-01-07.
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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 at lists.vmware.com
bugtraq at securityfocus.com
fulldisclosure at seclists.org
E-mail: security at vmware.com
PGP key at: http://kb.vmware.com/kb/1055
VMware Security Advisories
http://www.vmware.com/security/advisories
Consolidated list of VMware Security Advisories
http://kb.vmware.com/kb/2078735
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
Twitter
https://twitter.com/VMwareSRC
Copyright 2016 VMware Inc. All rights reserved.
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