‫ Microsoft patches antimalware engine vulnerability

Number: IRCNE2014062221
Date: 2014-06-18

According to “zdnet”, Microsoft has issued an update to all their antimalware products to fix a denial of service bug in the engine they share.

The advisory describing the update and vulnerability says that the denial of service is invoked when the engine scans a specially-crafted file. Denial of service bugs are often considered less-serious, but with this one: "[a]n attacker who successfully exploited this vulnerability could prevent the Microsoft Malware Protection Engine from monitoring affected systems until the specially crafted file is manually removed and the service is restarted."

The affected products run on both clients and servers:

  • Microsoft Forefront Client Security
  • Microsoft Forefront Endpoint Protection 2010
  • Microsoft Forefront Security for SharePoint Service Pack 3
  • Microsoft System Center 2012 Endpoint Protection
  • Microsoft System Center 2012 Endpoint Protection Service Pack 1
  • Microsoft Malicious Software Removal Tool (May 2014 or earlier versions)
  • Microsoft Security Essentials
  • Microsoft Security Essentials Prerelease
  • Windows Defender for Windows 8, Windows 8.1, Windows Server 2012, and Windows Server 2012 R2
  • Windows Defender for Windows RT and Windows RT 8.1
  • Windows Defender for Windows XP, Windows Server 2003, Windows Vista, Windows Server 2008, Windows 7, and Windows Server 2008 R2
  • Windows Defender Offline
  • Windows Intune Endpoint Protection

Updates to engines are typically deployed automatically, especially on consumer systems, so there is not likely any action that users need to take.



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