#VU79241 Spoofing attack in Microsoft .NET Framework - CVE-2023-36873

Vulnerability identifier: #VU79241

Vulnerability risk: High

CVSSv4.0: 7.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2023-36873

CWE-ID: CWE-451

Exploitation vector: Network

Exploit availability: No

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

Vendor: Microsoft

Description

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to incorrect processing of user-supplied data in .NET Framework. A remote attacker can spoof page content.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Microsoft .NET Framework: 3.5, 4.6.2, 4.7 - 4.7.2, 4.8 - 4.8.1

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External links
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-36873

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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.