Remote Code Execution Vulnerability in Microsoft SharePoint and .NET Framework
CVE-2020-1147

7.8HIGH

Key Information:

Vendor: Microsoft
Status: Microsoft Sharepoint Enterprise Server; Microsoft Sharepoint Server; Microsoft Visual Studio 2019; Microsoft Visual Studio 2019 Version 16.6 (includes 16.0 - 16.5)
Vendor: CVE Published:; 14 July 2020

Badges

👾 Exploit Exists🟡 Public PoC🟣 EPSS 92%🦅 CISA Reported

Summary

A flaw in Microsoft SharePoint, .NET Framework, and Visual Studio allows for remote code execution due to inadequate validation of XML file input. This vulnerability can be exploited by attackers to execute arbitrary code on the server, potentially leading to unauthorized access and system compromise. It is essential for users of these products to apply security updates and follow best practices to mitigate associated risks.

CISA Reported

CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed as being exploited but is not known by the CISA to be used in ransomware campaigns. This is subject to change at pace

The CISA's recommendation is: Apply updates per vendor instructions.

Affected Version(s)

.NET Core 2.1

.NET Core 3.1

Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2020-1147 - Proof of Concept