Vulnerability identifier: #VU6803
Vulnerability risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-20
Exploitation vector: Network
Exploit availability: No
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 perform a denial of service (DoS) attack.
The vulnerability exists due to an 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 and trigger a scan timeout.
Successful exploitation of the vulnerability may allow an attacker to disable anti-malware protection on the system until the affected service is restarted.
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 8.1 - on Windows 7 for 32-bit Systems Service Pack 1
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
External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8542
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?
No. We are not aware of malware exploiting this vulnerability.