VMSA-2017-0021
VMware ESXi, vCenter Server Appliance, Workstation and Fusion updates address multiple security vulnerabilities
VMware Security Advisory
1. Summary
VMware ESXi, Workstation and Fusion updates address multiple security vulnerabilities
2. Relevant Products
- VMware ESXi (ESXi)
- VMware vCenter Server Appliance (vCSA)
- VMware Workstation Pro / Player (Workstation)
- VMware Fusion Pro, Fusion (Fusion)
3. Problem Description
a. ESXi, Workstation, and Fusion stack overflow via authenticated VNC session
VMware ESXi, Workstation, and Fusion contain a vulnerability that could allow an authenticated VNC session to cause a stack overflow via a specific set of VNC packets. Successful exploitation of this issue could result in remote code execution in a virtual machine via the authenticated VNC session.
Note: In order for exploitation to be possible in ESXi, VNC must be manually enabled in a virtual machine's .vmx configuration file. In addition, ESXi must be configured to allow VNC traffic through the built-in firewall.
VMware would like to thank Lilith Wyatt and another member of Cisco Talos for reporting this issue to us.
The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the identifier CVE-2017-4941 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
b. ESXi, Workstation, and Fusion heap overflow via authenticated VNC session
VMware ESXi, Workstation, and Fusion contain a vulnerability that could allow an authenticated VNC session to cause a heap overflow via a specific set of VNC packets resulting in heap corruption. Successful exploitation of this issue could result in remote code execution in a virtual machine via the authenticated VNC session.
Note: In order for exploitation to be possible in ESXi, VNC must be manually enabled in a virtual machine's .vmx configuration file. In addition, ESXi must be configured to allow VNC traffic through the built-in firewall.
VMware would like to thank Lilith Wyatt of Cisco Talos for reporting this issue to us.
The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the identifier CVE-2017-4933 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
c. ESXi Host Client stored cross-site scripting vulnerability
The ESXi Host Client contains a vulnerability that may allow for stored cross-site scripting (XSS). An attacker can exploit this vulnerability by injecting Javascript, which might get executed when other users access the Host Client.
VMware would like to thank Alain Homewood of Insomnia Security for reporting this issue to us.
The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the identifier CVE-2017-4940 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
d. Privilege escalation in vCenter Server Appliance (vCSA)
VMware vCenter Server Appliance (vCSA) contains a local privilege escalation vulnerability via the 'showlog' plugin. Successful exploitation of this issue could result in a low privileged user gaining root level privileges over the appliance base OS.
VMware would like to thank Lukasz Plonka for reporting this issue to us.
The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the identifier CVE-2017-4943 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
4. Solution
Please review the patch/release notes for your product and version and verify the checksum of your downloaded file.
VMware ESXi 6.5
Downloads:
https://my.vmware.com/group/vmware/patch
Documentation:
http://kb.vmware.com/kb/2151061
VMware ESXi 6.0
Downloads:
https://my.vmware.com/group/vmware/patch
Documentation:
http://kb.vmware.com/kb/2151132
http://kb.vmware.com/kb/2151134
VMware ESXi 5.5
Downloads:
https://my.vmware.com/group/vmware/patch
Documentation:
http://kb.vmware.com/kb/2150876
http://kb.vmware.com/kb/2150878
vCSA 6.5 U1d
Downloads and Documentation:
https://my.vmware.com/web/vmware/details?downloadGroup=VC65U1D&productId=614&rPId=20189
VMware Workstation Pro 12.5.8
Downloads and Documentation:
https://www.vmware.com/go/downloadworkstation
https://www.vmware.com/support/pubs/ws_pubs.html
VMware Workstation Player 12.5.8
Downloads and Documentation:
https://www.vmware.com/go/downloadplayer
https://www.vmware.com/support/pubs/player_pubs.html
VMware Fusion Pro / Fusion 8.5.9
Downloads and Documentation:
https://www.vmware.com/go/downloadfusion
https://www.vmware.com/support/pubs/fusion_pubs.html
6. Change log
2017-12-19 VMSA-2017-0021
Initial security advisory in conjunction with the release of vSphere 6.5 patches on 2017-12-19.
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@vmware.com
PGP key at:
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https://www.vmware.com/support/policies/security_response.html
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VMware Security & Compliance Blog
https://blogs.vmware.com/security
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