Vulnerability identifier: #VU6543

Vulnerability risk: Low

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-0256

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
ASP.NET Core MVC
Universal components / Libraries / Software for developers

Vendor: Microsoft

Description
The vulnerability allows a remote unauthenticated attacker to perform spoofing attack.

The weakness exists due to improper validation of user-input requests by ASP.NET Core. A remote attacker can send a specially crafted web request and perform a spoofing attack to access the system.

Successful exploitation of the vulnerability may result in unauthorized access to entire database.

Mitigation
Install update from vendor's website.

Vulnerable software versions

ASP.NET Core MVC: 1.0.0 - 1.1.0

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External links
http://technet.microsoft.com/en-us/library/security/4021279.aspx

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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?

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