Microsoft Security Bulletin MS13-034 - Important
Vulnerability in Microsoft Antimalware Client Could Allow Elevation of Privilege (2823482)
Published: | Updated:
This security update resolves a privately reported vulnerability in the Microsoft Antimalware Client. The vulnerability could allow elevation of privilege due to the pathnames used by the Microsoft Antimalware Client. An attacker who successfully exploited this vulnerability could execute arbitrary code and take complete control of an affected system. The attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. An attacker must have valid logon credentials to exploit this vulnerability. The vulnerability could not be exploited by anonymous users.
This security update is rated Important for the Microsoft Antimalware Client in supported versions of Windows Defender for Windows 8 and Windows RT. This security update has no severity rating for the Microsoft Antimalware Client in other Microsoft antimalware programs. For more information, see the subsection, Affected and Non-Affected Software, in this section.
The security update addresses the vulnerability by correcting pathnames used by the Microsoft Antimalware Client. For more information about the vulnerabilities, see the Frequently Asked Questions (FAQ) subsection for the specific vulnerability entry under the next section, Vulnerability Information.
Recommendation. Most customers have automatic updating enabled and will not need to take any action because this security update will be downloaded and installed automatically. Customers who have not enabled automatic updating need to check for updates and install this update manually. For information about specific configuration options in automatic updating, see Microsoft Knowledge Base Article 294871.
For administrators and enterprise installations, or end users who want to install this security update manually, Microsoft recommends that customers apply the update at the earliest opportunity using update management software, or by checking for updates using the Microsoft Update service.
See also the section, Detection and Deployment Tools and Guidance, later in this bulletin.
|Knowledge Base Article||2823482|
The following software have been tested to determine which versions or editions are affected. Other versions or editions 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.
|Antimalware Software||Maximum Security Impact||Aggregate Severity Rating||Updates Replaced|
|Windows Defender for Windows 8 and Windows RT |
|Elevation of Privilege||Important||None|
This update is available via Windows Update.
|Windows Defender for Windows XP, Windows Server 2003, Windows Vista, Windows Server 2008, Windows 7, and Windows Server 2008 R2|
|Microsoft Security Essentials|
|Microsoft Forefront Client Security|
|Microsoft Forefront Endpoint Protection 2010|
|Microsoft System Center 2012 Endpoint Protection|
|Microsoft System Center 2012 Endpoint Protection Service Pack 1|
|Windows Intune Endpoint Protection|
|Microsoft System Center 2012 Endpoint Protection for Linux|
|Microsoft System Center 2012 Endpoint Protection for Mac|
|Microsoft System Center 2012 Endpoint Protection for Mac Service Pack 1|
|Microsoft Malicious Software Removal Tool|
|Microsoft Antigen for Exchange|
|Microsoft Antigen for SMTP Gateway|
|Forefront Security for Exchange Server|
|Forefront Protection 2010 for Exchange Server|
|Forefront Threat Management Gateway 2010 Service Pack 2|
|Microsoft Forefront Security for SharePoint|
|Forefront Security for Office Communications Server|
|Microsoft Standalone System Sweeper (part of Microsoft Diagnostics and Recovery Toolset)|
Microsoft thanks the following for working with us to help protect customers:
- Bruce Monroe of Intel for reporting the Microsoft Antimalware Improper Pathname Vulnerability (CVE-2013-0078)
- Shai Sarfaty for reporting the Microsoft Antimalware Improper Pathname Vulnerability (CVE-2013-0078)
- Tony Robotham of Centrica for reporting the Microsoft Antimalware Improper Pathname Vulnerability (CVE-2013-0078)
To improve security protections for customers, Microsoft provides vulnerability information to major security software providers in advance of each monthly security update release. Security software providers can then use this vulnerability information to provide updated protections to customers via their security software or devices, such as antivirus, network-based intrusion detection systems, or host-based intrusion prevention systems. To determine whether active protections are available from security software providers, please go to the active protections websites provided by program partners, listed in Microsoft Active Protections Program (MAPP) Partners.
How to obtain help and support for this security update
- Help installing updates: Support for Microsoft Update
- Security solutions for IT professionals: TechNet Security Troubleshooting and Support
- Help protect your computer that is running Windows from viruses and malware: Virus Solution and Security Center
- Local support according to your country: International Support
The information provided in the Microsoft Knowledge Base is provided "as is" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.
- V1.0 (April 9, 2013): Bulletin published.
- V1.1 (April 16, 2013): Bulletin revised to announce a detection change in the 2781197 package to correct a reoffering issue. This is a detection change only. Customers who have already successfully updated their systems do not need to take any action.
- V1.2 (October 8, 2013): Bulletin revised to announce a detection change in the 2781197 package. This is a detection change only. Customers who have already successfully updated their systems do not need to take any action.