Today VMware has released the following new security advisory:

“VMSA-2018-0010 – Horizon DaaS update addresses a broken authentication issue”

This documents the remediation of a moderate severity issue (CVE-2018-6960) in VMware Horizon DaaS that may allow an attacker to bypass two-factor authentication. In order to exploit this issue, an attacker must have a legitimate account on Horizon DaaS.

All VMware Horizon DaaS 7.x versions are affected. This issue has been addressed in VMware Horizon DaaS 8.0.0.

We would like to thank Peter Ivezaj, President – Digital Upkeep for reporting this issue to us.

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Today VMware has released the following new security advisory:

VMSA-2018-0009  – vRealize Automation (vRA) updates address multiple security issues

This documents the remediation of Important and Moderate severity issues (CVE-2018-6958  and CVE-2018-6959).

Issue (a)  CVE-2018-6958 is a DOM-based cross-site scripting (XSS) vulnerability. Exploitation of this issue may lead to the compromise of the vRA user’s workstation.

Issue (b) CVE-2018-6959 is a vulnerability in the handling of session IDs. Exploitation of this issue may lead to the hijacking of a valid vRA user’s session.

vRealize Automation 7.3.1 and 7.4.0 provide remediations for these vulnerabilities.

VMware would like to thank Oliver Matula and Benjamin Schwendemann of ERNW Enno Rey Netzwerke GmbH for reporting these issues to us.

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Greetings from the VMware Security Response Center!

It’s time.

Today we released VMSA-2018-0004.3 which documents Hypervisor-Assisted Guest Mitigations for CVE-2017-5715 (Spectre-2).

We thought it would be a good idea to quickly link all of the documentation which has undergone a major change. For newcomers, please familiarize yourself by reading through KB52245 first to get a strong understanding of the various categories of mitigations that VMware has provided.

Major Updates:

Updated Advisory: VMSA-2018-0004.3
Top-level KB: 52245
Patching/Upgrade Guide: 52085
Performance Info: 52337
Intel microcode sightings: 52345

Customers should review the available documentation and direct questions to VMware Support.

Today, VMware has released the following new security advisory:

“VMSA-2018-0008 – Workstation and Fusion updates address a denial-of-service vulnerability

This documents the remediation of an Important severity denial-of-service vulnerability (CVE-2018-6957) affecting VMware Workstation and Fusion. This issue can be triggered by opening a large number of VNC sessions.  In order for exploitation to be possible, VNC must be manually enabled on Workstation and Fusion.

VMware Workstation 14.1.1 and Fusion 10.1.1 fix this issue. Workaround KB52934 is available for VMware Workstation 12.x and Fusion 8.x.

We would like to thank Lilith Wyatt of Cisco Talos for reporting this issue to us.

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I’d like to apologize for the previous blog post, this was an old draft that was later revised. The following is the message we intended to send:

Greetings from the VMware Security Response Center!

We thought we should post an explanation of today’s changes to VMSA-2018-0007 as we have split the the advisory into 2 sections:

a. This section now covers CVE-2017-5753 (Spectre-1), and CVE-2017-5754 (Meltdown) specifically.

b. This section is now devoted to CVE-2017-5715 (Spectre-2).

The reason we have done this is to clarify which of these issues have been mitigated against currently known variants of the different vulnerabilities. Because Meltdown is considered by some to be the most severe/exploitable of the issues, we did not want to wait for complete Spectre-2 mitigations while Spectre-1/Meltdown fixes were ready to ship. We also understand that some customers may want to delay updating until all mitigations are in place. While we strongly recommend taking updates as soon as they become available, we wanted to be transparent about the fact that more updates are on the way.

VMware appliances listed in this advisory are shipping on either Novell SLES or VMware Photon OS. As a result, the mitigations provided for CVE-2017-5715 (Spectre-2) may vary when first released.

Products will be enumerated in section b. when either of the following requirements are met:

1. IBPB/IBRS is supported.
2. Retpoline is supported.

Because this is an ongoing issue, VMware appliances will continue to accept improved open source mitigations as they are created.

Today VMware has released the following new and updated security advisories:

VMSA-2018-0007

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Today, VMware has released the following new security advisory:

“VMSA-2018-0005 – VMware Workstation, and Fusion updates resolve use-after-free and integer-overflow vulnerabilities”

This documents the remediation of Critical and Important severity issues (CVE-2017-4949, and CVE-2017-4950).

Issues (a) CVE-2017-4949 is a use-after-free vulnerability in VMware NAT service which can be exploited when IPv6 mode is enabled. This issue is rated as critical and may allow a guest to execute code on the host.

Issue (b) CVE-2017-4950 is an integer-overflow vulnerability in VMware NAT service which can be exploited when IPv6 mode is enabled. This issue is rated as important and may lead to an out-of-bound read which can then be used to execute code on the host in conjunction with other issues.

IPv6 mode for VMNAT is not enabled by default. VMware Workstation 14.1.1, 12.5.9 and VMware Fusion 10.1.1, 8.5.10 fix these issues.

We would like to thank WenQunWang of Tencent’s Xuanwu LAB for reporting these issues to us.

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Today, VMware has released the following new security advisory:

“VMSA-2018-0003 – vRealize Operations for Horizon, vRealize Operations for Published Applications, Workstation, Horizon View Client and Tools updates resolve multiple security vulnerabilities”

This documents the remediation of three Important severity issues (CVE-2017-4945, CVE-2017-4946, and CVE-2017-4948).

Issues (a) CVE-2017-4946 is a privilege escalation vulnerability that affects vRealize Operations for Horizon (V4H) and vRealize Operations for Published Applications (V4PA) agents. Successful exploitation of this issue may allow low privileged windows users to escalate their privileges to SYSTEM. Workaround for ‘vROPs plugin for Horizon’ and ‘vROPs for Published applications’ 6.4.0 and 6.5.0 versions are available. Please see VMSA-2018-0003 for more information

Issue (b) CVE-2017-4948 is an out-of-bounds read issue that occurs via Cortado ThinPrint. This issue affects Workstation and Horizon View Client. On Workstation, this issue in conjunction with other bugs may allow a guest to leak information from host or may allow for a Denial of Service on the Windows OS that runs Workstation. In the case of a Horizon View Client, this issue in conjunction with other bugs may allow a View desktop to leak information from host or may allow for a Denial of Service on the Windows OS that runs the Horizon View Client. Workstation 14.1.0 and Horizon View Client for Windows 4.7.0 fix this issue.

Issue (c) CVE-2017-4945 is a guest access control vulnerability and affects Workstation and Fusion. Successful exploitation of this issue may allow program execution via Unity on locked Windows VMs.

We would like to thank Martin Lemay of GoSecure Inc., Yakun Zhang of McAfee, and Tudor Enache of the United Arab Emirates Computer Emergency Response Team (aeCERT) for reporting these issues to us.

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Update 01/10/18: VMSA-2018-0004 has been released detailing Hypervisor-Assisted Guest Mitigation fixes. An explanation of the different types of mitigations being provided by VMware can be found in KB52245. Please note that if you have applied the patches listed in VMSA-2018-0004 you do not need the patches listed in VMSA-2018-0002.

Update 01/04/18: OS vendors have begun issuing patches that address CVE-2017-5753, CVE-2017-5715, and CVE-2017-5754 for their operating systems. For these patches to be fully functional in a guest OS additional ESXi and vCenter Server updates will be required. These updates are being given the highest priority. Please sign up to the Security-Announce mailing list to be alerted when these updates are available.

Today VMware has released the following new security advisory:

VMSA-2018-0002 – VMware ESXi, Workstation and Fusion updates address side-channel analysis due to speculative execution.

This advisory documents remediation for known variants of the Bounds-Check Bypass (CVE-2017-5753) and Branch Target Injection (CVE-2017-5715) issues due to speculative execution disclosed today by Google Project Zero. These issues may result in information disclosure from one Virtual Machine to another Virtual Machine that is running on the same host.

A third issue due to speculative execution, Rogue Data Cache Load (CVE-2017-5754), was disclosed along the other two issues. It does not affect ESXi, Workstation, and Fusion because ESXi does not run untrusted user mode code, and Workstation and Fusion rely on the protection that the underlying operating system provides.

The remediation as documented in VMSA-2018-0002, has been present in VMware Cloud on AWS since early December 2017.

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Customers should review the security advisory and direct any questions to VMware Support.