Security restrictions bypass in ASP.NET Core MVC - CVE-2018-0786

Vulnerability identifier: #VU9899

CSH Severity: Low

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2018-0786

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to bypass security restrictions on the target system.

The weakness exists due to improper validation of certificates by Microsoft .NET Framework (and .NET Core) components. A remote attacker can supply an invalid certificate and disregard the Enhanced Key Usage taggings.

ASP.NET Core MVC
Microsoft .NET Framework

Install update from vendor's website.

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0786

• Multiple vulnerabilities in Microsoft ASP.NET Core
• Multiple vulnerabilities in Microsoft .NET Framework