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AUSCERT External Security Bulletin Redistribution
ESB-2020.1288
VMSA-2020-0006 - VMware vCenter Server updates address sensitive
information disclosure vulnerability in the VMware Directory
Service (vmdir)
14 April 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: vCenter Server 6.7
Publisher: VMWare
Operating System: Virtualisation
Windows
Impact/Access: Access Confidential Data -- Remote/Unauthenticated
Unauthorised Access -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2020-3952
Original Bulletin:
https://www.vmware.com/security/advisories/VMSA-2020-0006.html
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VMware Security Advisories
+---------+-------------------------------------------------------------------+
|Advisory |VMSA-2020-0006 |
|ID | |
+---------+-------------------------------------------------------------------+
|Advisory |Critical |
|Severity | |
+---------+-------------------------------------------------------------------+
|CVSSv3 |10.0 |
|Range | |
+---------+-------------------------------------------------------------------+
| |VMware vCenter Server updates address sensitive information |
|Synopsis |disclosure vulnerability in the VMware Directory Service (vmdir) |
| |(CVE-2020-3952) |
+---------+-------------------------------------------------------------------+
|Issue |2020-04-09 |
|Date | |
+---------+-------------------------------------------------------------------+
|Updated |2020-04-09 (Initial Advisory) |
|On | |
+---------+-------------------------------------------------------------------+
|CVE(s) |CVE-2020-3952 |
+---------+-------------------------------------------------------------------+
1. Impacted Products
o VMware vCenter Server
2. Introduction
A sensitive information disclosure vulnerability in the VMware Directory
Service (vmdir) was privately reported to VMware. vCenter updates are available
to address this vulnerability.
3. VMware vCenter Server updates address sensitive information disclosure
vulnerability in the VMware Directory Service (vmdir) (CVE-2020-3952)
Description:
Under certain conditions^1 vmdir that ships with VMware vCenter Server, as part
of an embedded or external Platform Services Controller (PSC), does not
correctly implement access controls. VMware has evaluated the severity of this
issue to be in the Critical severity range with a maximum CVSSv3 base score of
10.0.
Known Attack Vectors:
A malicious actor with network access to an affected vmdir deployment may be
able to extract highly sensitive information which could be used to compromise
vCenter Server or other services which are dependent upon vmdir for
authentication.
Resolution:
To remediate CVE-2020-3952 apply the updates listed in the 'Fixed Version'
column of the 'Response Matrix' below to affected deployments.
Workarounds:
None.
Additional Documentation:
VMware has created KB78543 which details steps to determine whether or not a
particular deployment is affected by CVE-2020-3952.
Acknowledgements:
None.
Notes:
^1vCenter Server 6.7 (embedded or external PSC) prior to 6.7u3f is affected by
CVE-2020-3952 if it was upgraded from a previous release line such as 6.0 or
6.5. Clean installations of vCenter Server 6.7 (embedded or external PSC) are
not affected.
Response Matrix:
+-------+-------+---------+-------------+------+--------+----------+-----------+-------------+
|Product|Version|Running |CVE |CVSSV3|Severity|Fixed |Workarounds|Additional |
| | |On |Identifier | | |Version | |Documentation|
+-------+-------+---------+-------------+------+--------+----------+-----------+-------------+
|vCenter|7.0 |Any |CVE-2020-3952|N/A |N/A |Unaffected|N/A |N/A |
|Server | | | | | | | | |
+-------+-------+---------+-------------+------+--------+----------+-----------+-------------+
|vCenter|6.7 |Virtual |CVE-2020-3952|10.0 |Critical|6.7u3f |None |KB78543 |
|Server | |Appliance| | | | | | |
+-------+-------+---------+-------------+------+--------+----------+-----------+-------------+
|vCenter|6.7 |Windows |CVE-2020-3952|10.0 |Critical|6.7u3f |None |KB78543 |
|Server | | | | | | | | |
+-------+-------+---------+-------------+------+--------+----------+-----------+-------------+
|vCenter|6.5 |Any |CVE-2020-3952|N/A |N/A |Unaffected|N/A |N/A |
|Server | | | | | | | | |
+-------+-------+---------+-------------+------+--------+----------+-----------+-------------+
4. References
Fixed Version(s) and Release Notes:
vCenter Server 6.7u3f:
https://my.vmware.com/web/vmware/details?productId=742&rPId=44888&downloadGroup
=VC67U3F
Additional Documentation:
https://kb.vmware.com/s/article/7854
Mitre CVE Dictionary Links:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-3952
FIRST CVSSv3 Calculator:
https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/
I:H/A:H
5. Change log
2020-04-09 VMSA-2020-0006
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
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