#VU6801 Memory corruption in Microsoft products

Vulnerability identifier: #VU6801

Vulnerability risk: High

CVSSv4.0: [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber]

CVE-ID: CVE-2017-8540

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Microsoft Malware Protection Engine
Client/Desktop applications / Antivirus software/Personal firewalls
Windows Defender
Client/Desktop applications / Antivirus software/Personal firewalls
Microsoft Security Essentials
Client/Desktop applications / Antivirus software/Personal firewalls
Microsoft Endpoint Protection
Client/Desktop applications / Antivirus software/Personal firewalls
Windows Intune Endpoint Protection
Client/Desktop applications / Antivirus software/Personal firewalls
Microsoft Forefront Endpoint Protection
Server applications / DLP, anti-spam, sniffers
Microsoft Exchange Server
Server applications / Mail servers

Vendor: Microsoft

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing specially crafted files within Microsoft Malware Protection Engine (mpengine.dll). A remote attacker can create a specially crafted file, pass it to the affected application, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation
Update Microsoft Malware Protection Engine (mpengine.dll) to version 1.1.13804.0.

Vulnerable software versions

Microsoft Malware Protection Engine: 1.1.13704.0

Windows Defender: for Windows RT 8.1 - for Windows 10, Windows 10 1511, Windows 10 1607, Windows Server 2016, Windows 10 1703

Microsoft Security Essentials: All versions

Microsoft Forefront Endpoint Protection: 2010

Microsoft Endpoint Protection: All versions

Microsoft Exchange Server: 2013 RTM 15.00.0516.032, 2016 RTM 15.01.0225.042

Windows Intune Endpoint Protection: All versions

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External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8540

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.