Vulnerability identifier: #VU9308

Vulnerability risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2017-8700

CWE-ID: CWE-200

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 attacker to bypass security restrictions on the target system.

The vulnerability exists due to improper access control. A remote attacker can bypass Cross-origin Resource Sharing (CORS) configurations and retrieve restricted content from a web application.

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://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8700

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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. However, proof of concept for this vulnerability is available.