#VU9307 Open redirect in ASP.NET Core MVC - CVE-2017-11879

Vulnerability identifier: #VU9307

Vulnerability risk: Low

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-11879

CWE-ID: CWE-601

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 gain elevated privileges on the target system.

The vulnerability exists due to insufficient sanitization of untrusted input data when performing redirects to external websites. A remote attacker can create a specially crafted URL,  redirect users to the malicious websites and gain system privileges.

Mitigation
Install update from vendor's website.

Vulnerable software versions

ASP.NET Core MVC: 2.0

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External links
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11879

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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.