Microsoft Security Bulletin MS16-067 - Important
Security Update for Volume Manager Driver (3155784)
Published: May 10, 2016 | Updated: May 13, 2016
Version: 1.1
Executive Summary
This security update resolves a vulnerability in Microsoft Windows. The vulnerability could allow information disclosure if a USB disk mounted over Remote Desktop Protocol (RDP) via Microsoft RemoteFX is not correctly tied to the session of the mounting user.
This security update is rated Important for all supported editions of Windows Server 2012 and Windows Server 2012 R2. For more information, see the Affected Software section.
The security update addresses the vulnerability by ensuring that access to USB disks over RDP is correctly enforced to prevent non-mounting session access. For more information about the vulnerability, see the Vulnerability Information section.
For more information about this update, see Microsoft Knowledge Base Article 3155784.
Affected Software and Vulnerability Severity Ratings
The following software versions or editions are affected. Versions or editions that are not listed are either past their support life cycle or are not affected. To determine the support life cycle for your software version or edition, see Microsoft Support Lifecycle.
The severity ratings indicated for each affected software assume the potential maximum impact of the vulnerability. For information regarding the likelihood, within 30 days of this security bulletin’s release, of the exploitability of the vulnerability in relation to its severity rating and security impact, please see the Exploitability Index in the May bulletin summary.
**Operating System** | [**Remote Desktop Protocol Drive Redirection Information Disclosure Vulnerability - CVE-2016-0190**](http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=cve-2016-0190) |
Updates Replaced* |
|
Windows 8.1 |
|||
[Windows 8.1 for 32-bit Systems](https://www.microsoft.com/download/details.aspx?familyid=c9844f19-454c-41c4-9ed2-18ee6b0081ca) (3155784) | Not applicable | None | |
[Windows 8.1 for x64-based Systems](https://www.microsoft.com/download/details.aspx?familyid=da792985-0a5c-4c73-ae78-babc06bfd4de) (3155784) | Not applicable | None | |
**Windows Server 2012 and Windows Server 2012 R2** | |||
[Windows Server 2012](https://www.microsoft.com/download/details.aspx?familyid=a903abd5-2916-4a89-bcee-bea690931927) (3155784) | **Important** Information Disclosure | None | |
[Windows Server 2012 R2](https://www.microsoft.com/download/details.aspx?familyid=7999febc-a709-4138-8e9c-750e99e15c59) (3155784) | **Important** Information Disclosure | None | |
**Windows RT 8.1** | |||
Windows RT 8.1[1] (3155784) | Not applicable | None | |
**Server Core installation option** | |||
[Windows Server 2012](https://www.microsoft.com/download/details.aspx?familyid=a903abd5-2916-4a89-bcee-bea690931927) (Server Core installation) (3155784) | **Important** Information Disclosure | None | |
[Windows Server 2012 R2](https://www.microsoft.com/download/details.aspx?familyid=7999febc-a709-4138-8e9c-750e99e15c59) (Server Core installation) (3155784) | **Important** Information Disclosure | None |
Note Windows Server 2016 Technical Preview 5 is affected. Customers running this operating system are encouraged to apply the update, which is available via Windows Update.
*The Updates Replaced column shows only the latest update in any chain of superseded updates. For a comprehensive list of updates replaced, go to the Microsoft Update Catalog, search for the update KB number, and then view update details (updates replaced information is provided on the Package Details tab).
Vulnerability Information
Remote Desktop Protocol Drive Redirection Information Disclosure Vulnerability - CVE-2016-0190
An information disclosure vulnerability exists in Microsoft Windows when a USB disk mounted over Remote Desktop Protocol (RDP) via Microsoft RemoteFX is not correctly tied to the session of the mounting user. An attacker who successfully exploited this vulnerability could obtain access to file and directory information on the mounting user’s USB disk. This update addresses the vulnerability by ensuring that access to USB disks over RDP is correctly enforced to prevent non-mounting session access.
The following table contains a link to the standard entry for each vulnerability in the Common Vulnerabilities and Exposures list:
Vulnerability Title | CVE number | Publicly disclosed | Exploited |
Remote Desktop Protocol Drive Redirection Information Disclosure Vulnerability | CVE-2016-0190 | No | No |