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AUSCERT External Security Bulletin Redistribution
ESB-2020.1457
VMware ESXi patches address Stored Cross-Site Scripting
(XSS) vulnerability (CVE-2020-3955)
29 April 2020
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: VMware ESXi
Publisher: VMWare
Operating System: VMware ESX Server
Impact/Access: Cross-site Scripting -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2020-3955
Original Bulletin:
https://www.vmware.com/security/advisories/VMSA-2020-0008.html
- --------------------------BEGIN INCLUDED TEXT--------------------
VMware Security Advisories
+------------+----------------------------------------------------------------+
|Advisory ID |VMSA-2020-0008 |
+------------+----------------------------------------------------------------+
|Advisory |Important |
|Severity | |
+------------+----------------------------------------------------------------+
|CVSSv3 Range|8.3 |
+------------+----------------------------------------------------------------+
|Synopsis |VMware ESXi patches address Stored Cross-Site Scripting (XSS) |
| |vulnerability (CVE-2020-3955) |
+------------+----------------------------------------------------------------+
|Issue Date |2020-04-28 |
+------------+----------------------------------------------------------------+
|Updated On |2020-04-28 (Initial Advisory) |
+------------+----------------------------------------------------------------+
|CVE(s) |CVE-2020-3955 |
+------------+----------------------------------------------------------------+
1. Impacted Products
VMware ESXi
2. Introduction
A Stored Cross-Site Scripting (XSS) vulnerability in VMware ESXi was privately
reported to VMware. Patches are available to address this vulnerability in
affected VMware products.
3. VMware ESXi patches address Stored Cross-Site Scripting (XSS) vulnerability
(CVE-2020-3955)
Description:
The VMware ESXi Host Client does not properly neutralize script-related HTML
when viewing virtual machines attributes. VMware has evaluated the severity of
this issue to be in the Important severity range with a maximum CVSSv3 base
score of 8.3.
Known Attack Vectors:
A malicious actor with access to modify the system properties of a virtual
machine from inside the guest os (such as changing the hostname of the virtual
machine) may be able to inject malicious script which will be executed by a
victim's browser when viewing this virtual machine via the ESXi Host Client.
Resolution:
To remediate CVE-2020-3955 apply the updates listed in the 'Fixed Version'
column of the 'Response Matrix' below.
Workarounds:
None.
Additional Documentation:
None.
Notes:
None.
Acknowledgements:
VMware would like to thank Benny Husted and DAWUSHI for independently reporting
this issue to us.
+-------+-------+-------+-------------+------+---------+--------------------+-----------+-------------+
|Product|Version|Running|CVE |CVSSV3|Severity |Fixed Version |Workarounds|Additional |
| | |On |Identifier | | | | |Documentation|
+-------+-------+-------+-------------+------+---------+--------------------+-----------+-------------+
|ESXi |7.0 |Any |CVE-2020-3955|N/A |N/A |Unaffected |N/A |N/A |
+-------+-------+-------+-------------+------+---------+--------------------+-----------+-------------+
|ESXi |6.7 |Any |CVE-2020-3955|8.3 |Important|ESXi670-202004103-SG|None |None |
+-------+-------+-------+-------------+------+---------+--------------------+-----------+-------------+
|ESXi |6.5 |Any |CVE-2020-3955|8.3 |Important|ESXi650-201912104-SG|None |None |
+-------+-------+-------+-------------+------+---------+--------------------+-----------+-------------+
4. References
Fixed Version(s) and Release Notes:
VMware ESXi 6.7 ESXi670-202004103-SG
https://my.vmware.com/group/vmware/patch
https://docs.vmware.com/en/VMware-vSphere/6.7/rn/esxi670-202004002.html
VMware ESXi 6.5 ESXi650-201912104-SG
https://my.vmware.com/group/vmware/patch
https://docs.vmware.com/en/VMware-vSphere/6.5/rn/esxi650-201912002.html
Mitre CVE Dictionary Links:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-3955
FIRST CVSSv3 Calculator:
https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:H/
I:H/A:H
5. Change log
2020-04-28 VMSA-2020-0008
Initial security advisory.
6. 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@lists.vmware.com
bugtraq@securityfocus.com
fulldisclosure@seclists.org
E-mail: security@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 2020 VMware Inc. All rights reserved.
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