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Category:   Application (Security)  >   Microsoft Malware Protection Engine Vendors:   Microsoft
Microsoft Malware Protection Engine File Processing Flaws Let Remote Users Deny Service and Execute Arbitrary Code
SecurityTracker Alert ID:  1038571
SecurityTracker URL:  http://securitytracker.com/id/1038571
CVE Reference:   CVE-2017-8535, CVE-2017-8536, CVE-2017-8537, CVE-2017-8538, CVE-2017-8539, CVE-2017-8540, CVE-2017-8541, CVE-2017-8542   (Links to External Site)
Date:  May 26 2017
Impact:   Denial of service via local system, Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 1.1.13704.0 and prior
Description:   Multiple vulnerabilities were reported in Microsoft Malware Protection Engine. A remote user can cause arbitrary code to be executed on the target system. A local user can cause denial of service conditions on the target system.

A remote user can create a specially crafted file that, when scanned by the target Microsoft Malware Protection Engine, will execute arbitrary code on the target system [CVE-2017-8538, CVE-2017-8540, CVE-2017-8541]. The code will run with LocalSystem privileges.

A remote user can create a specially crafted file that, when scanned by the target Microsoft Malware Protection Engine, will cause a scan timeout on the target system [CVE-2017-8535, CVE-2017-8536, CVE-2017-8537, CVE-2017-8539, CVE-2017-8542]. As a result, the Microsoft Malware Protection Engine service will not monitor the target system until the service is restarted.

Mateusz Jurczyk of Google Project Zero reported these vulnerabilities.

Impact:   A remote user can create content that, when loaded by the target user, will execute arbitrary code with LocalSystem privileges on the target system.

A local user can prevent the target Microsoft Malware Protection Engine from monitoring the target system. A service restart is required to return the system to normal operations.

Solution:   The vendor has issued a fix (1.1.13804.0).

The vendor advisories are available at:

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8535
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8536
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8537
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8538
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8539
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8540
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8541
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8542

Vendor URL:  portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8542 (Links to External Site)
Cause:   Access control error
Underlying OS:  Windows (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
May 26 2017 (Microsoft Issues Fix for Microsoft Windows Defender) Microsoft Malware Protection Engine File Processing Flaws Let Remote Users Deny Service and Execute Arbitrary Code
Microsoft has issued a fix for Microsoft Windows Defender.
May 26 2017 (Microsoft Issues Fix for Microsoft Exchange) Microsoft Malware Protection Engine File Processing Flaws Let Remote Users Deny Service and Execute Arbitrary Code
Microsoft has issued a fix for Microsoft Exchange.
May 26 2017 (Microsoft Issues Fix for Microsoft Forefront Endpoint Protection) Microsoft Malware Protection Engine File Processing Flaws Let Remote Users Deny Service and Execute Arbitrary Code
Microsoft has issued a fix for Microsoft Forefront Endpoint Protection.



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