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Monthly Archives: April 2017

New VMware Security Advisory VMSA-2017-0008.2

Update 04/21/2017: Updated security advisory to clarify the Unified Access Gateway and Horizon View affected versions.

Update 04/19/2017: We have corrected the Horizon View Client for Windows version.

Today VMware has released the following new security advisory:

VMSA-2017-0008.2 – VMware Unified Access Gateway, Horizon View and Workstation updates resolve multiple security vulnerabilities

This documents several critical memory corruption vulnerabilities affecting VMware Unified Access Gateway (formerly called Access Point) (8.2.x, 2.7.x and 2.5.x), Horizon View (7.x, 6.x),  and Horizon View Client for Windows (4.x) and Workstation (12.5.x).

Issue (a) is a heap-based buffer overflow vulnerability (CVE-2017-4907) which affects VMware Unified Access Gateway and Horizon View. This issue may be exploited remotely to execute code on the security gateway. VMware Unified Access Gateway 2.9 is not affected. This issue has been addressed in VMware Unified Access Gateway 2.8.1, Horizon View 7.1.0 and 6.2.4.

Issues (b), (c) and (d) are heap-based buffer-overflow, out-of-bounds read/write and integer-overflow vulnerabilities (CVE-2017-4908, CVE-2017-4909, CVE-2017-4910, CVE-2017-4911, CVE-2017-4912, CVE-2017-4913) in JPEG2000 and TrueType Font (TTF) parsers in the TPView.dll. These issues exist due the use of vulnerable Cortado ThinPrint component and impact VMware Horizon View Client for Windows and Workstation. Exploitation is possible only if virtual printing has been enabled. This feature is not enabled by default on Workstation but it is enabled by default on Horizon View. These issues have been addressed in VMware Workstation 12.5.3 and  Horizon View Client for Windows 4.4.0.

We would like to thank Claudio Moletta (redr2e), and Ke Liu of Tencent’s Xuanwu Lab,  Gogil and Giwan Go of STEALIEN working with ZDI for reporting these issues to us.

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

New VMware Security Advisory VMSA-2017-0007

On Tuesday, 4th of April 2017 a remote code-execution issue in the BlazeDS library (CVE-2017-5641) was disclosed in a US-CERT security advisory. We have reviewed the issue and determined that VMware vCenter Server 6.5 and 6.0 are affected due to the use of BlazeDS to process AMF3 messages. VMware vCenter Server 5.5 is not affected.

We have released the following new security advisory which documents the fixes for VMware vCenter Server 6.5 and 6.0 along with the workarounds:

VMSA-2017-0007– VMware vCenter Server update resolves a remote code execution vulnerability via BlazeDS

Successful exploitation of this issue may allow an attacker to execute arbitrary code when deserializing an untrusted Java object. The issue is present in the Customer Experience Improvement Program (CEIP) opt-in UI. The vulnerability will still be present even if a customer has opted out of CEIP. Resolution of this vulnerability requires applying the fixes or the workarounds. We have also investigated this issue against the other VMware products. VMware products which are not listed in the security advisory are not affected.

We would like to thank Markus Wulftange of Code White GmbH for reporting this issue to us.

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