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AUSCERT External Security Bulletin Redistribution
ESB-2020.3598.2
VMSA-2020-0023 - VMware ESXi, Workstation, Fusion and NSX-T updates address
multiple security vulnerabilities (CVE-2020-3981, CVE-2020-3982,
CVE-2020-3992, CVE-2020-3993, CVE-2020-3994, CVE-2020-3995)
5 November 2020
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: VMware ESXi
VMware Workstation Pro / Player (Workstation)
VMware Fusion Pro / Fusion (Fusion)
NSX-T
VMware Cloud Foundation
Publisher: VMware
Operating System: Virtualisation
VMware ESX Server
Windows
Linux variants
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Access Privileged Data -- Remote with User Interaction
Denial of Service -- Existing Account
Provide Misleading Information -- Remote with User Interaction
Reduced Security -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2020-3995 CVE-2020-3994 CVE-2020-3993
CVE-2020-3992 CVE-2020-3982 CVE-2020-3981
Original Bulletin:
https://www.vmware.com/security/advisories/VMSA-2020-0023.html
Revision History: November 5 2020: Vendor updated patch version detail in response matrix of section (3a)
October 21 2020: Initial Release
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Critical Advisory ID: VMSA-2020-0023.1
CVSSv3 Range: 5.9 - 9.8
Issue Date: 2020-10-20
Updated On: 2020-11-04
CVE(s): CVE-2020-3981, CVE-2020-3982, CVE-2020-3992, CVE-2020-3993,
CVE-2020-3994, CVE-2020-3995
Synopsis: VMware ESXi, Workstation, Fusion and NSX-T updates address multiple
security vulnerabilities (CVE-2020-3981, CVE-2020-3982, CVE-2020-3992,
CVE-2020-3993, CVE-2020-3994, CVE-2020-3995)
1. Impacted Products
o VMware ESXi
o VMware Workstation Pro / Player (Workstation)
o VMware Fusion Pro / Fusion (Fusion)
o NSX-T
o VMware Cloud Foundation
o VMware vCenter Server
2. Introduction
IMPORTANT: The ESXi patches released on October 20, 2020 did not address
CVE-2020-3992 completely, see section (3a) Notes for an update.
Multiple vulnerabilities in VMware ESXi, Workstation, Fusion and NSX-T were
privately reported to VMware. Updates are available to remediate these
vulnerabilities in affected VMware products.
3a. ESXi OpenSLP remote code execution vulnerability (CVE-2020-3992)
Description
OpenSLP as used in ESXi has a use-after-free issue. VMware has evaluated the
severity of this issue to be in the Critical severity range with a maximum
CVSSv3 base score of 9.8.
Known Attack Vectors
A malicious actor residing in the management network who has access to port 427
on an ESXi machine may be able to trigger a use-after-free in the OpenSLP
service resulting in remote code execution.
Resolution
To remediate CVE-2020-3992 apply the patches listed in the 'Fixed Version'
column of the 'Response Matrix' found below.
Workarounds
Workarounds for CVE-2020-3992 have been listed in the 'Workarounds' column of
the 'Response Matrix' below.
Additional Documentation
None.
Acknowledgements
VMware would like to thank Lucas Leong (@_wmliang_) of Trend Micro's Zero Day
Initiative for reporting this issue to us.
Notes
The ESXi patches released on October 20, 2020 did not address CVE-2020-3992
completely. The ESXi patches listed in the Response Matrix below are updated
versions that contain the complete fix for CVE-2020-3992.
Response Matrix:
Product Version Running CVE CVSSv3 Severity Fixed Version Workarounds Additional
On Identifier Documentation
ESXi 7.0 Any CVE-2020-3992 9.8 critical ESXi70U1a-17119627 KB76372 None
ESXi 6.7 Any CVE-2020-3992 9.8 critical ESXi670-202011301-SG KB76372 None
ESXi 6.5 Any CVE-2020-3992 9.8 critical ESXi650-202011401-SG KB76372 None
VMware
Cloud 4.x Any CVE-2020-3992 9.8 critical Patch pending KB76372 None.
Foundation
(ESXi)
VMware
Cloud 3.x Any CVE-2020-3992 9.8 critical Patch Pending KB76372 None
Foundation
(ESXi)
3b. NSX-T MITM vulnerability (CVE-2020-3993)
Description
VMware NSX-T contains a security vulnerability that exists in the way it allows
a KVM host to download and install packages from NSX manager. VMware has
evaluated the severity of this issue to be in the Important severity range with
a maximum CVSSv3 base score of 7.5.
Known Attack Vectors
A malicious actor with MITM positioning may be able to exploit this issue to
compromise the transport node.
Resolution
To remediate CVE-2020-3993 apply the patches listed in the 'Fixed Version'
column of the 'Response Matrix' found below.
Workarounds
None.
Additional Documentation
None.
Acknowledgements
VMware would like to thank Kevin Kelpen of ERNW Enno Rey Netzwerke GmbH for
reporting this issue to us.
Notes
None.
Response Matrix:
Product Version Running CVE CVSSv3 Severity Fixed Workarounds Additional
On Identifier Version Documentation
NSX-T 3.x Any CVE-2020-3993 7.5 important 3.0.2 None None
NSX-T 2.5.x Any CVE-2020-3993 7.5 important 2.5.2.2.0 None None
VMware
Cloud 4.x Any CVE-2020-3993 7.5 important 4.1 None None.
Foundation
(NSX-T)
VMware
Cloud 3.x Any CVE-2020-3993 7.5 important 3.10.1.1 None. None
Foundation
(NSX-T)
3c. TOCTOU out-of-bounds read vulnerability (CVE-2020-3981)
Description
VMware ESXi, Workstation and Fusion contain an out-of-bounds read vulnerability
due to a time-of-check time-of-use issue in ACPI device. VMware has evaluated
the severity of this issue to be in the Important severity range with a maximum
CVSSv3 base score of 7.1.
Known Attack Vectors
A malicious actor with administrative access to a virtual machine may be able
to exploit this issue to leak memory from the vmx process.
Resolution
To remediate CVE-2020-3981 apply the patches listed in the 'Fixed Version'
column of the 'Response Matrix' found below.
Workarounds
None.
Additional Documentation
None.
Acknowledgements
VMware would like to thank Reno Robert working with Trend Micro's Zero Day
Initiative for reporting this issue to us.
Notes
None.
Response Matrix:
Product Version Running CVE CVSSv3 Severity Fixed Version Workarounds Additional
On Identifier Documentation
ESXi 7.0 Any CVE-2020-3981 7.1 important ESXi_7.0.1-0.0.16850804 None. None
ESXi 6.7 Any CVE-2020-3981 7.1 important ESXi670-202008101-SG None None
ESXi 6.5 Any CVE-2020-3981 7.1 important ESXi650-202007101-SG None None
Fusion 12.x OS X CVE-2020-3981 N/A N/A Unaffected N/A N/A
Fusion 11.x OS X CVE-2020-3981 7.1 important 11.5.6 None None
Workstation 16.x Any CVE-2020-3981 N/A N/A Unaffected N/A N/A
Workstation 15.x Any CVE-2020-3981 7.1 important Patch pending None None
VMware
Cloud 4.x Any CVE-2020-3981 7.1 important 4.1 None None.
Foundation
(ESXi)
VMware
Cloud 3.x Any CVE-2020-3981 7.1 important 3.10.1 None None
Foundation
(ESXi)
3d. TOCTOU out-of-bounds write vulnerability (CVE-2020-3982)
Description
VMware ESXi, Workstation and Fusion contain an out-of-bounds write
vulnerability due to a time-of-check time-of-use issue in ACPI device. VMware
has evaluated the severity of this issue to be in the Moderate severity range
with a maximum CVSSv3 base score of 5.9.
Known Attack Vectors
A malicious actor with administrative access to a virtual machine may be able
to exploit this vulnerability to crash the virtual machine's vmx process or
corrupt hypervisor's memory heap.
Resolution
To remediate CVE-2020-3982 apply the patches listed in the 'Fixed Version'
column of the 'Response Matrix' found below.
Workarounds
None.
Additional Documentation
None.
Acknowledgements
VMware would like to thank Reno Robert working with Trend Micro's Zero Day
Initiative for reporting this issue to us.
Notes
None.
Response Matrix:
Product Version Running CVE CVSSv3 Severity Fixed Version Workarounds Additional
On Identifier Documentation
ESXi 7.0 Any CVE-2020-3982 5.9 moderate ESXi_7.0.1-0.0.16850804 None. None
ESXi 6.7 Any CVE-2020-3982 5.9 moderate ESXi670-202008101-SG None None
ESXi 6.5 Any CVE-2020-3982 5.9 moderate ESXi650-202007101-SG None None
Fusion 12.x OS X CVE-2020-3982 N/A N/A Unaffected N/A N/A
Fusion 11.x OS X CVE-2020-3982 5.9 moderate 11.5.6 None None
Workstation 16.x Any CVE-2020-3982 N/A N/A Unaffected N/A N/A
Workstation 15.x Any CVE-2020-3982 5.9 moderate Patch pending None None
VMware
Cloud 4.x Any CVE-2020-3982 5.9 moderate 4.1 None None.
Foundation
(ESXi)
VMware
Cloud 3.x Any CVE-2020-3982 5.9 moderate 3.10.1 None None
Foundation
(ESXi)
3e. vCenter Server session hijack vulnerability in update function
(CVE-2020-3994)
Description
VMware vCenter Server contains a session hijack vulnerability in the vCenter
Server Appliance Management Interface update function due to a lack of
certificate validation. VMware has evaluated the severity of this issue to be
in the Important severity range with a maximum CVSSv3 base score of 7.5.
Known Attack Vectors
A malicious actor with network positioning between vCenter Server and an update
repository may be able to perform a session hijack when the vCenter Server
Appliance Management Interface is used to download vCenter updates.
Resolution
To remediate CVE-2020-3994 apply the patches listed in the 'Fixed Version'
column of the 'Response Matrix' found below.
Workarounds
None.
Additional Documentation
None.
Acknowledgements
VMware would like to thank Thorsten Tullmann, Karlsruhe Institute of
Technology, for reporting this issue to us.
Notes
None.
Response Matrix:
Product Version Running CVE CVSSv3 Severity Fixed Workarounds Additional
On Identifier Version Documentation
vCenter 7.0 Any CVE-2020-3994 N/A N/A Unaffected N/A N/A
Server
vCenter 6.7 Virtual CVE-2020-3994 7.5 important 6.7 U3 None None
Server Appliance
vCenter 6.7 Windows CVE-2020-3994 N/A N/A Unaffected N/A N/A
Server
vCenter 6.5 Virtual CVE-2020-3994 7.5 important 6.5 U3K None None
Server Appliance
vCenter 6.5 Windows CVE-2020-3994 N/A N/A Unaffected N/A N/A
Server
VMware
Cloud
Foundation 4.x Any CVE-2020-3994 N/A N/A Unaffected N/A N/A
(vCenter
Server)
VMware
Cloud
Foundation 3.x Any CVE-2020-3994 7.5 important 3.9.0 None None
(vCenter
Server)
3f. VMCI host driver memory leak vulnerability (CVE-2020-3995)
Description
The VMCI host drivers used by VMware hypervisors contain a memory leak
vulnerability. VMware has evaluated the severity of this issue to be in the
Important severity range with a maximum CVSSv3 base score of 7.1.
Known Attack Vectors
A malicious actor with access to a virtual machine may be able to trigger a
memory leak issue resulting in memory resource exhaustion on the hypervisor if
the attack is sustained for extended periods of time.
Resolution
To remediate CVE-2020-3995 apply the patches listed in the 'Fixed Version'
column of the 'Response Matrix' found below.
Workarounds
None.
Additional Documentation
None.
Acknowledgements
VMware would like to thank Tianwen Tang (VictorV) for reporting this issue to
us.
Notes
None.
Response Matrix:
Product Version Running CVE CVSSv3 Severity Fixed Version Workarounds Additional
On Identifier Documentation
ESXi 7.0 Any CVE-2020-3995 N/A N/A Unaffected N/A N/A
ESXi 6.7 Any CVE-2020-3995 7.1 important ESXi670-201908101-SG None None
ESXi 6.5 Any CVE-2020-3995 7.1 important ESXi650-201907101-SG None None
Fusion 11.x OS X CVE-2020-3995 7.1 important 11.1.0 None None
Workstation 15.x Any CVE-2020-3995 7.1 important 15.1.0 None None
VMware
Cloud 4.x Any CVE-2020-3995 N/A N/A Unaffected N/A N/A
Foundation
(ESXi)
VMware
Cloud 3.x Any CVE-2020-3995 7.1 important 3.9.0 None None
Foundation
(ESXi)
4. References
VMware ESXi 7.0 ESXi70U1a-17119627
Downloads and Documentation:
https://my.vmware.com/group/vmware/patch
https://docs.vmware.com/en/VMware-vSphere/7.0/rn/vsphere-esxi-70u1a.html
VMware ESXi 6.7 ESXi670-202011301-SG
Downloads and Documentation:
https://my.vmware.com/group/vmware/patch
https://docs.vmware.com/en/VMware-vSphere/6.7/rn/esxi670-202011001.html
VMware ESXi 6.5 ESXi650-202011401-SG
Downloads and Documentation:
https://my.vmware.com/group/vmware/patch
https://docs.vmware.com/en/VMware-vSphere/6.5/rn/esxi650-202011001.html
VMware Workstation Pro 15.5.6
Downloads and Documentation:
https://www.vmware.com/go/downloadworkstation
https://docs.vmware.com/en/VMware-Workstation-Pro/index.html
VMware Workstation Player 15.5.6
Downloads and Documentation:
https://www.vmware.com/go/downloadplayer
https://docs.vmware.com/en/VMware-Workstation-Player/index.html
VMware Fusion 11.5.6
Downloads and Documentation:
https://www.vmware.com/go/downloadfusion
https://docs.vmware.com/en/VMware-Fusion/index.html
VMware NSX-T 3.0.2
Downloads and Documentation:
https://my.vmware.com/en/web/vmware/downloads/details?downloadGroup=NSX-T-302&
productId=982&rPId=52624
https://docs.vmware.com/en/VMware-NSX-T-Data-Center/index.html
VMware NSX-T 2.5.2.2.0
Downloads and Documentation:
https://my.vmware.com/en/web/vmware/downloads/details?downloadGroup=NSX-T-2522&
productId=673&rPId=53876
https://docs.vmware.com/en/VMware-NSX-T-Data-Center/index.html
VMware vCenter Server 6.7u3
Downloads and Documentation:
https://my.vmware.com/web/vmware/downloads/details?downloadGroup=VC67U3&
productId=742&rPId=52126
VMware vCenter Server 6.5u3k
Downloads and Documentation:
https://my.vmware.com/en/web/vmware/downloads/details?downloadGroup=VC65U3K&
productId=614&rPId=50173
VMware vCloud Foundation 4.1
Downloads and Documentation:
https://docs.vmware.com/en/VMware-Cloud-Foundation/4.1/rn/
VMware-Cloud-Foundation-41-Release-Notes.html
VMware vCloud Foundation 3.10.1.1
Downloads and Documentation:
https://docs.vmware.com/en/VMware-Cloud-Foundation/3.10.1/rn/
VMware-Cloud-Foundation-3101-Release-Notes.html#3.10.1.1
VMware vCloud Foundation 3.9
Downloads and Documentation:
https://my.vmware.com/web/vmware/downloads/details?downloadGroup=VCF390&
productId=945&rPId=41516
Mitre CVE Dictionary Links:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-3981
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-3982
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-3992
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-3993
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-3994
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-3995
FIRST CVSSv3 Calculator:
CVE-2020-3981 - https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/
PR:N/UI:N/S:C/C:H/I:N/A:N
CVE-2020-3982 - https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:H/
PR:N/UI:N/S:C/C:N/I:H/A:N
CVE-2020-3992 - https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/
PR:N/UI:N/S:U/C:H/I:H/A:H
CVE-2020-3993 - https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:H/
PR:N/UI:R/S:U/C:H/I:H/A:H
CVE-2020-3994 - https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:H/
PR:N/UI:R/S:U/C:H/I:H/A:H
CVE-2020-3995 - https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/
PR:N/UI:N/S:C/C:N/I:N/A:H
5. Change Log
2020-10-20 VMSA-2020-0023
Initial security advisory.
2020-11-04 VMSA-2020-0023.1
Updated patch versions in the response matrix of section (3a) after release of
ESXi patches that completed the incomplete fix for CVE-2020-3992 on 2020-11-04.
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