Windows 10: CVE-2018-0986 | Microsoft Malware Protection Engine Vulnerability

  1. Brink's Avatar
    Posts : 33,119
    64-bit Windows 10 Pro build 18262
       03 Apr 2018 #1

    CVE-2018-0986 | Microsoft Malware Protection Engine Vulnerability


    A remote code execution vulnerability exists when the Microsoft Malware Protection Engine does not properly scan a specially crafted file, leading to memory corruption. An attacker who successfully exploited this vulnerability could execute arbitrary code in the security context of the LocalSystem account and take control of the system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

    To exploit this vulnerability, a specially crafted file must be scanned by an affected version of the Microsoft Malware Protection Engine. There are many ways that an attacker could place a specially crafted file in a location that is scanned by the Microsoft Malware Protection Engine. For example, an attacker could use a website to deliver a specially crafted file to the victim's system that is scanned when the website is viewed by the user. An attacker could also deliver a specially crafted file via an email message or in an Instant Messenger message that is scanned when the file is opened. In addition, an attacker could take advantage of websites that accept or host user-provided content, to upload a specially crafted file to a shared location that is scanned by the Malware Protection Engine running on the hosting server.

    If the affected antimalware software has real-time protection turned on, the Microsoft Malware Protection Engine will scan files automatically, leading to exploitation of the vulnerability when the specially crafted file is scanned. If real-time scanning is not enabled, the attacker would need to wait until a scheduled scan occurs in order for the vulnerability to be exploited. All systems running an affected version of antimalware software are primarily at risk.

    The update addresses the vulnerability by correcting the manner in which the Microsoft Malware Protection Engine scans specially crafted files.

    Note: Typically, no action is required of enterprise administrators or end users to install updates for the Microsoft Malware Protection Engine, because the built-in mechanism for the automatic detection and deployment of updates will apply the update within 48 hours of release. The exact time frame depends on the software used, Internet connection, and infrastructure configuration.


    Exploitability Assessment

    The following table provides an exploitability assessment for this vulnerability at the time of original publication.

    Publicly Disclosed Exploited Latest Software Release Older Software Release Denial of Service
    No No 2 - Exploitation Less Likely 2 - Exploitation Less Likely Not Applicable


    Affected Products

    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 the Microsoft Support Lifecycle.

    Product Platform Article Download Impact Severity Supersedence
    Microsoft Exchange Server 2013 Remote Code Execution Critical
    Microsoft Exchange Server 2016 Remote Code Execution Critical
    Microsoft Forefront Endpoint Protection 2010 Remote Code Execution Critical
    Microsoft Security Essentials Remote Code Execution Critical
    Windows Defender Windows Server 2012 R2 Remote Code Execution Critical
    Windows Defender Windows 10 Version 1703 for 32-bit Systems Remote Code Execution Critical
    Windows Defender Windows 10 Version 1703 for x64-based Systems Remote Code Execution Critical
    Windows Defender Windows 10 Version 1709 for 32-bit Systems Remote Code Execution Critical
    Windows Defender Windows 10 Version 1709 for 64-based Systems Remote Code Execution Critical
    Windows Defender Windows Server, version 1709 (Server Core Installation) Remote Code Execution Critical
    Windows Defender Windows 10 for 32-bit Systems Remote Code Execution Critical
    Windows Defender Windows 10 for x64-based Systems Remote Code Execution Critical
    Windows Defender Windows 10 Version 1511 for 32-bit Systems Remote Code Execution Critical
    Windows Defender Windows 10 Version 1511 for x64-based Systems Remote Code Execution Critical
    Windows Defender Windows 10 Version 1607 for 32-bit Systems Remote Code Execution Critical
    Windows Defender Windows Server 2012 R2 (Server Core installation) Remote Code Execution Critical
    Windows Defender Windows Server 2016 Remote Code Execution Critical
    Windows Defender Windows Server 2016 (Server Core installation) Remote Code Execution Critical
    Windows Defender Windows 7 for 32-bit Systems Service Pack 1 Remote Code Execution Critical
    Windows Defender Windows 7 for x64-based Systems Service Pack 1 Remote Code Execution Critical
    Windows Defender Windows 8.1 for 32-bit systems Remote Code Execution Critical
    Windows Defender Windows 8.1 for x64-based systems Remote Code Execution Critical
    Windows Defender Windows RT 8.1 Remote Code Execution Critical
    Windows Defender Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 Remote Code Execution Critical
    Windows Defender Windows Server 2008 R2 for x64-based Systems Service Pack 1 Remote Code Execution Critical
    Windows Defender Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) Remote Code Execution Critical
    Windows Defender Windows Server 2012 Remote Code Execution Critical
    Windows Defender Windows Server 2012 (Server Core installation) Remote Code Execution Critical
    Windows Defender Windows 10 Version 1607 for x64-based Systems Remote Code Execution Critical
    Windows Intune Endpoint Protection Remote Code Execution Critical

    Mitigations

    Microsoft has not identified any mitigating factors for this vulnerability.

    Workarounds

    Microsoft has not identified any workarounds for this vulnerability.


    Read more: https://portal.msrc.microsoft.com/en.../CVE-2018-0986
      My ComputersSystem Spec

  2. Faith's Avatar
    Posts : 529
    Windows 10 Home October 2018 Update 64-bit
       04 Apr 2018 #1

    Uh-oh.
      My ComputerSystem Spec

  3. AndreTen's Avatar
    Posts : 14,674
    Windows 10 (Pro and Insider Pro)
       04 Apr 2018 #2

    Is current Insider vulnerable, or does this means that it's updated? Sorry, but MS is not always easy to understand..

    FAQ
    References
    Identification
    Last version of the Microsoft Malware Protection Engine affected by this vulnerability Version 1.1.14600.4
    First version of the Microsoft Malware Protection Engine with this vulnerability addressed Version 1.1.14700.5

    Insider version: Click image for larger version. 

Name:	image.png 
Views:	38 
Size:	7.6 KB 
ID:	183416
      My ComputersSystem Spec

  4. Bree's Avatar
    Posts : 8,835
    10 Home x64 (1809) (10 Pro on 2nd pc)
       04 Apr 2018 #3

    On 16299.334 - NOT an Insider version. Was on 1.1.14700.4. But after checking for updates and installing this...

    Click image for larger version. 

Name:	defender-04-04-18_update.PNG 
Views:	38 
Size:	9.4 KB 
ID:	183420

    ...Defender now shows this:

    Click image for larger version. 

Name:	defender-04-04-18_engine.PNG 
Views:	38 
Size:	6.8 KB 
ID:	183421
      My ComputersSystem Spec

  5. AndreTen's Avatar
    Posts : 14,674
    Windows 10 (Pro and Insider Pro)
       04 Apr 2018 #4

    Bree said: View Post
    NOT an Insider version, and was on 1.1.14700.4. But after checking for updates and installing this...

    Click image for larger version. 

Name:	defender-04-04-18_update.PNG 
Views:	38 
Size:	9.4 KB 
ID:	183420

    ...Defender now shows this:

    Click image for larger version. 

Name:	defender-04-04-18_engine.PNG 
Views:	38 
Size:	6.8 KB 
ID:	183421
    Same here
      My ComputersSystem Spec

  6. Gordon7's Avatar
    Posts : 182
    Win 10 rs1 - build 14393.1944
       04 Apr 2018 #5

    If you manually update Win Defender, you will get the new engine plus definitions updated.

    Do this if you run on "metered" connections!!!
      My ComputerSystem Spec


 

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