#VU24270 Input validation error in Microsoft .NET Framework and Microsoft .NET Core - CVE-2020-0606

Vulnerability identifier: #VU24270

Vulnerability risk: High

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:Amber]

CVE-ID: CVE-2020-0606

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Microsoft .NET Framework
Server applications / Frameworks for developing and running applications
Microsoft .NET Core
Server applications / Frameworks for developing and running applications

Vendor: Microsoft

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to insufficient validation of user-supplied input when the software fails to check the source markup of a file. A remote attacker can trick a victim to open s specially crafted file and execute arbitrary code in the context of the current user.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Microsoft .NET Framework: 3.0, 3.5 - 3.5.1, 4.5.2, 4.6, 4.8

Microsoft .NET Core: 3.0, 3.1

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External links
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0606

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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.