Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2019.3958
VMSA-2019-0018 VMware vCenter Server Appliance updates address sensitive
information disclosure vulnerability in backup and restore
functions (CVE-2019-5537, CVE-2019-5538)
25 October 2019
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: VMware vCenter Server Appliance
Publisher: VMWare
Operating System: Virtualisation
Impact/Access: Access Confidential Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2019-5538 CVE-2019-5537
Original Bulletin:
https://www.vmware.com/security/advisories/VMSA-2019-0018.html
- --------------------------BEGIN INCLUDED TEXT--------------------
VMware Security Advisories
+---------+-------------------------------------------------------------------+
|Advisory |VMSA-2019-0018 |
|ID | |
+---------+-------------------------------------------------------------------+
|Advisory |Moderate |
|Severity | |
+---------+-------------------------------------------------------------------+
|CVSSv3 |6.8 |
|Range | |
+---------+-------------------------------------------------------------------+
| |VMware vCenter Server Appliance updates address sensitive |
|Synopsis |information disclosure vulnerability in backup and restore |
| |functions (CVE-2019-5537, CVE-2019-5538) |
+---------+-------------------------------------------------------------------+
|Issue |2019-10-24 |
|Date | |
+---------+-------------------------------------------------------------------+
|Updated |2019-10-24 (Initial Advisory) |
|On | |
+---------+-------------------------------------------------------------------+
|CVE(s) |CVE-2019-5537, CVE-2019-5538 |
+---------+-------------------------------------------------------------------+
1. Impacted Products
VMware vCenter Server Appliance
2. Introduction
Vulnerabilities in the File-Based Backup and Restore functions of vCenter
Server Appliance were privately reported to the VMware Security Response
Center. Updates are available which allow enablement of strict certificate
validation to remediate these vulnerabilities.
3. VMware vCenter Server Appliance sensitive information disclosure
vulnerabilities in File-Based Backup and Restore functions (CVE-2019-5537 and
CVE-2019-5538)
Description:
Sensitive information disclosure vulnerabilities resulting from a lack of
certificate validation during the File-Based Backup and Restore operations of
VMware vCenter Server Appliance may allow a malicious actor to intercept
sensitive data in transit over FTPS and HTTPS (CVE-2019-5537) as well as SCP
(CVE-2019-5538). VMware has evaluated the severity of these issues to be in the
Moderate severity range with a maximum CVSSv3 base score of 6.8.
Known Attack Vectors:
A malicious actor with man-in-the-middle positioning between vCenter Server
Appliance and a backup target may be able to intercept sensitive data in
transit during File-Based Backup and Restore operations.
Resolution:
To remediate CVE-2019-5537 and CVE-2019-5538 first apply the patches listed in
the 'Fixed Version' column and then follow the instructions documented in
KB75156 listed in the 'Additional Documentation' column found in the
'Resolution Matrix' below to enforce strict certificate validation.
Workarounds:
None.
Additional Documentation:
To avoid breaking currently configured File-Based Backup and Restore workflows,
remediation of CVE-2019-5537 and CVE-2019-5538 is not enabled by default. After
upgrading vCenter Server Appliance, follow the steps in KB75156 to enforce
strict certificate validation.
Notes:
None.
Acknowledgements:
VMware would like to thank Thorsten Tullmann, Karlsruhe Institute of Technology
and James Renken for independently reporting these issues to us.
Response Matrix:
+---------+-------+---------+--------------+------+--------+----------+-----------+----------+
|Product |Version|Running |CVE Identifier|CVSSV3|Severity|Fixed |Workarounds|Additional|
| | |On | | | |Version | |Documents |
+---------+-------+---------+--------------+------+--------+----------+-----------+----------+
|vCenter | |Virtual |CVE-2019-5537,| | | | | |
|Server |6.7 |Appliance|CVE-2019-5538 |6.8 |Moderate|6.7u3a |None |KB75156 |
|Appliance| | | | | | | | |
+---------+-------+---------+--------------+------+--------+----------+-----------+----------+
|vCenter | |Virtual |CVE-2019-5537,| | | | | |
|Server |6.5 |Appliance|CVE-2019-5538 |6.8 |Moderate|6.5u3d |None |KB75156 |
|Appliance| | | | | | | | |
+---------+-------+---------+--------------+------+--------+----------+-----------+----------+
|vCenter | |Virtual |CVE-2019-5537,| | | | | |
|Server |6.0 |Appliance|CVE-2019-5538 |N/A |N/A |Unaffected|None |None |
|Appliance| | | | | | | | |
+---------+-------+---------+--------------+------+--------+----------+-----------+----------+
4. References
FIRST CVSSv3 Calculator:
https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/
I:N/A:N
Mitre CVE Dictionary Links:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-5537
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-5538
Fixed Version(s) and Release Notes:
VMware vCenter Server Appliance 6.7u3a
https://my.vmware.com/web/vmware/details?productId=742&rPId=38207&downloadGroup
=VC67U3a
VMware vCenter Server Appliance 6.5u3d
https://my.vmware.com/web/vmware/details?productId=614&rPId=38398&downloadGroup
=ESXI65U3D
Additional Documentation:
https://kb.vmware.com/s/article/75156
5. Change log
2019-10-24: VMSA-2019-0018
Initial security advisory detailing remediations for CVE-2019-5537 and
CVE-2019-5538 in VMware vCenter Server Appliance 6.7u3a and 6.5u3d.
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 2019 VMware Inc. All rights reserved.
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
https://www.auscert.org.au/bulletins/
===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967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=DAIn
-----END PGP SIGNATURE-----