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AUSCERT External Security Bulletin Redistribution
ESB-2017.1846
VMware VIX API VM Direct Access Function security issue
28 July 2017
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AusCERT Security Bulletin Summary
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Product: VMware VIX API
Publisher: VMware
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Increased Privileges -- Existing Account
Resolution: Mitigation
CVE Names: CVE-2017-4919
Original Bulletin:
https://www.vmware.com/security/advisories/VMSA-2017-0012.html
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VMSA-2017-0012
VMware VIX API VM Direct Access Function security issue
VMware Security Advisory
Advisory ID:
VMSA-2017-0012
Severity:
Important
Synopsis:
VMware VIX API VM Direct Access Function security issue
Issue date:
2017-07-27
Updated on:
2017-07-27 (Initial Advisory)
CVE numbers:
CVE-2017-4919
1. Summary
VMware VIX API allows for direct access to Guest Operating Systems (Guest OSs)
by vSphere users with limited privileges.
2. Relevant Products
VMware vCenter Server
3. Problem Description
VMware VIX API VM Direct Access Function security issue
The VMware VIX API has a functionality that allows for direct access to Guests
OSs which is used by VMware Site Recovery Manager, VMware Update Manager, and
VMware Infrastructure Navigator to manage Guest OSs. This functionality may be
used by vSphere users with limited privileges to access a Guest OS without the
need to authenticate.
In order for vSphere users with limited privileges to use this functionality,
they would need to have all three of the following privileges:
Virtual Machine -> Configuration -> Advanced
Virtual Machine -> Interaction -> Guest Operating System Management by VIX API
Host -> Configuration -> Advanced Settings
Workaround
Workarounds that remove the direct access to Guest OSs by vSphere users with
limited privileges are listed in VMware Knowledge Base article 2151027.
These workarounds are not relevant for vSphere users that are fully privileged.
Typically they already have alternate ways to access Guest OSs.
VMware would like to thank Ofri Ziv and Itamar Tal of Guardicore for reporting
this issue to us.
The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned
the identifier CVE-2017-4919 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 Running Severity Replace with/ Mitigation/
Version on Apply Patch Workaround
vCenter Server 6.5 Any Important N/A KB 2151027
vCenter Server 6.0 Any Important N/A KB 2151027
vCenter Server 5.5 Any Important N/A KB 2151027
4. Solution
Please review the patch/release notes for your product and version and verify
the checksum of your downloaded file.
Apply the workaround listed in VMware Knowledge Base article 2151027.
5. References
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-4919
VMware Knowledge Base article 2151027
https://kb.vmware.com/kb/2151027
6. Change log
2017-07-27 VMSA-2017-0012
Initial security advisory providing a workaround on 2017-07-27.
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: https://kb.vmware.com/kb/1055
VMware Security Advisories
http://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 2017 VMware Inc. All rights reserved.
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