VMSA-2018-0027

VMware ESXi, Workstation, and Fusion updates address uninitialized stack memory usage.

VMware Security Advisory
 
VMware Security Advisory Advisory ID:
  VMSA-2018-0027
VMware Security Advisory Severity:
  Critical
VMware Security Advisory Synopsis:
  VMware ESXi, Workstation, and Fusion updates address uninitialized stack memory usage
VMware Security Advisory Issue date:
  2018-11-09
VMware Security Advisory Updated on:
  2018-11-09 (Initial Advisory)
VMware Security Advisory CVE numbers:
  CVE-2018-6981, CVE-2018-6982
1. Summary

VMware ESXi, Workstation, and Fusion updates address uninitialized stack memory usage.

2. Relevant Products
  • VMware vSphere ESXi (ESXi)
  • VMware Workstation Pro / Player (Workstation)
  • VMware Fusion Pro, Fusion (Fusion)
3. Problem Description

a. 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 researchers Zhangyanyu of Chaitin Tech and SmallerDragon 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
Product Version
Running on
Severity
Replace with/ Apply Patch
Mitigation/ Workaround
VMware Product ESXi
Product Version 6.7
Running on ESXi
Severity Critical
Replace with/ Apply Patch ESXi670-201811401-BG
Mitigation/ Workaround None
VMware Product ESXi
Product Version 6.5
Running on ESXi
Severity Critical
Replace with/ Apply Patch ESXi650-201811301-BG
Mitigation/ Workaround None
VMware Product ESXi
Product Version 6.0
Running on ESXi
Severity Critical
Replace with/ Apply Patch ESXi600-201811401-BG
Mitigation/ Workaround None
VMware Product Workstation
Product Version 15.x
Running on Any
Severity Critical
Replace with/ Apply Patch 15.0.1
Mitigation/ Workaround None
VMware Product Workstation
Product Version 14.x
Running on Any
Severity Critical
Replace with/ Apply Patch 14.1.4
Mitigation/ Workaround None
VMware Product Fusion
Product Version 11.x
Running on OS X
Severity Critical
Replace with/ Apply Patch 11.0.1
Mitigation/ Workaround None
VMware Product Fusion
Product Version 10.x
Running on OS X
Severity Critical
Replace with/ Apply Patch 10.1.4
Mitigation/ Workaround None

 

b. 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
Product Version
Running on
Severity
Replace with/ Apply Patch
Mitigation/ Workaround
VMware Product ESXi
Product Version 6.7
Running on ESXi
Severity Important
Replace with/ Apply Patch ESXi670-201811401-BG
Mitigation/ Workaround None
VMware Product ESXi
Product Version 6.5
Running on ESXi
Severity Important
Replace with/ Apply Patch ESXi650-201811301-BG
Mitigation/ Workaround None
VMware Product ESXi
Product Version 6.0
Running on ESXi
Severity N/A
Replace with/ Apply Patch Not affected
Mitigation/ Workaround N/A
VMware Product Workstation
Product Version Any
Running on Any
Severity N/A
Replace with/ Apply Patch Not affected
Mitigation/ Workaround N/A
VMware Product Fusion
Product Version Any
Running on OS X
Severity N/A
Replace with/ Apply Patch Not affected
Mitigation/ Workaround N/A

 

4. 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  

 

6. 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.

 

7. Contact

 

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This Security Advisory is posted to the following lists:

  security-announce@lists.vmware.com

  bugtraq@securityfocus.com

  fulldisclosure@seclists.org

 

E-mail: security@vmware.com

PGP key at:

https://kb.vmware.com/kb/1055

 

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