VMware has released a security advisory last Friday about a vulnerability in VMXNET3 network adapter .. Read the announcement for more details and the required patch to resolve the issue.

 

VMware Security Advisory

 

Advisory ID: VMSA-2018-0027

Severity:    Critical

Synopsis:    VMware ESXi, Workstation, and Fusion updates address

uninitialized stack memory usage Issue date:  2018-11-09 Updated on:  2018-11-09 (Initial Advisory) CVE number:  CVE-2018-6981, CVE-2018-6982

 

  1. Summary

 

VMware ESXi, Workstation, and Fusion updates address uninitialized

stack memory usage.

 

  1. Relevant Products

 

VMware vSphere ESXi (ESXi)

VMware Workstation Pro / Player (Workstation)

VMware Fusion Pro / Fusion (Fusion)

 

  1. Problem Description

 

  1. vmxnet3 uninitialized stack memory usage

 

VMware ESXi, Fusion and Workstation contain uninitialized stack

memory usage in the vmxnet3 virtual network adapter. This

issue may allow a guest to execute code on the host. The issue is

present if vmxnet3 is enabled. Non vmxnet3 virtual adapters are not

affected by this issue.

 

VMware would like to thank the organizers of GeekPwn2018 and security

researcher Zhangyanyu of Chaitin Tech for reporting this issue to us.

 

The Common Vulnerabilities and Exposures project (cve.mitre.org) has

assigned the identifier CVE-2018-6981 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

==========  ======= ====== ========     =============     ===========

ESXi        6.7     ESXi   Critical     ESXi670-201811401-BG  None

ESXi        6.5     ESXi   Critical     ESXi650-201811301-BG  None

ESXi        6.0     ESXi   Critical     ESXi600-201811401-BG  None

Workstation 15.x    Any    Critical     15.0.1                None

Workstation 14.x    Any    Critical     14.1.4                None

Fusion      11.x    OS X   Critical     11.0.1                None

Fusion      10.x    OS X   Critical     10.1.4                None

 

 

  1. vmxnet3 uninitialized stack memory usage

 

VMware ESXi, Fusion and Workstation contain uninitialized stack

memory usage in the vmxnet3 virtual network adapter. This issue may

lead to an information leak from host to guest. The issue is present

if vmxnet3 is enabled. Non vmxnet3 virtual adapters are not affected

by this issue.

 

VMware would like to thank the organizers of GeekPwn2018 and security

researcher Zhangyanyu of Chaitin Tech for reporting this issue to us.

 

The Common Vulnerabilities and Exposures project (cve.mitre.org) has

assigned the identifier CVE-2018-6982 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

==========  ======= ====== ========     =============     ===========

ESXi        6.7     ESXi   Important    ESXi670-201811401-BG  None

ESXi        6.5     ESXi   Important    ESXi650-201811301-BG  None

ESXi        6.0     ESXi   N/A          not affected          N/A

Workstation Any     Any    N/A          not affected          N/A

Fusion      Any     OS X   N/A          not affected          N/A

 

  1. Solution

 

Please review the patch/release notes for your product and

version and verify the checksum of your downloaded file.

 

ESXi 6.7

Downloads:

https://my.vmware.com/group/vmware/patch

Documentation:

https://docs.vmware.com/en/VMware-vSphere/6.7/rn/esxi670-201811001.html

 

ESXi 6.5

Downloads:

https://my.vmware.com/group/vmware/patch

Documentation:

https://docs.vmware.com/en/VMware-vSphere/6.5/rn/esxi650-201811001.html

 

ESXi 6.0

Downloads:

https://my.vmware.com/group/vmware/patch

Documentation:

https://docs.vmware.com/en/VMware-vSphere/6.0/rn/esxi600-201811001.html

 

VMware Workstation Pro 14.1.4, 15.0.1

Downloads and Documentation:

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

https://docs.vmware.com/en/VMware-Workstation-Pro/index.html

 

VMware Workstation Player 14.1.4, 15.0.1

Downloads and Documentation:

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

https://docs.vmware.com/en/VMware-Workstation-Player/index.html

 

VMware Fusion Pro / Fusion 10.1.4, 11.0.1

Downloads and Documentation:

https://www.vmware.com/go/downloadfusion

https://docs.vmware.com/en/VMware-Fusion/index.html

 

 

  1. References

 

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6981

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6982

 

– ————————————————————————

 

  1. Change log

 

VMSA-2018-0027 2018-11-09

Initial security advisory in conjunction with the release of ESXi 6.0,

6.5, 6.7 patches and VMware Workstation 14.1.4, 15.0.1 and Fusion

10.1.4, 11.0.1 on 2018-11-09.

 

– ————————————————————————

  1. 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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