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Category:   Application (Security)  >   Microsoft Windows Defender Vendors:   Microsoft
Microsoft Windows Defender File Processing Flaw in Malware Protection Engine Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1038784
SecurityTracker URL:
CVE Reference:   CVE-2017-8558   (Links to External Site)
Date:  Jun 23 2017
Impact:   Execution of arbitrary code via network, Root access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): Microsoft Malware Protection Engine 1.1.13804.0 and prior
Description:   A vulnerability was reported in Microsoft Windows Defender. A remote user can cause arbitrary code to be executed on the target user's system.

A remote user can create a specially crafted file that, when scanned by the target Microsoft Malware Protection Engine (mpengine.dll) application, will execute arbitrary code on the target system. The code will run with LocalSystem privileges.

Microsoft Security Essentials is also affected.

Tavis Ormandy of Google Project Zero reported this vulnerability.

Impact:   A remote user can create content that, when scanned by the target application, will execute arbitrary code with LocalSystem privileges on the target system.
Solution:   The vendor has issued a fix (Microsoft Malware Protection Engine 1.1.13903.0).

The vendor advisory is available at:

Vendor URL: (Links to External Site)
Cause:   Access control error
Underlying OS:  Windows (2008), Windows (7), Windows (8), Windows (10)
Underlying OS Comments:  7 SP1, 2008 SP2, 8.1, 10, 10 Version 1511, 10 Version 1607, 10 Version 1703

Message History:   None.

 Source Message Contents

[Original Message Not Available for Viewing]

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