#VU21290 Input validation error in Microsoft products - CVE-2019-1255

Vulnerability identifier: #VU21290

Vulnerability risk: Low

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

CVE-ID: CVE-2019-1255

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

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

Vendor: Microsoft

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of files within the Microsoft Malware Protection Engine in Microsoft Defender. A remote attacker can create a specially crafted file, trick the victim into executing it and prevent legitimate accounts from executing legitimate system binaries. 

Mitigation

Vulnerable software versions

Microsoft Security Essentials: All versions

Microsoft Forefront Endpoint Protection: 2010

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

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External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1255

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.