.NET Framework Elevation of Privilege Vulnerability Affecting Microsoft Products
CVE-2020-1066

7.8HIGH

Key Information:

Vendor
Microsoft
Status
Microsoft .net Framework 3.0
Microsoft .net Framework 3.5.1
Vendor
CVE Published:
21 May 2020

Badges

👾 Exploit Exists🟡 Public PoC🟣 EPSS 29%

Summary

A vulnerability exists in .NET Framework that allows an attacker with access to the local machine to elevate their privileges. This occurs through the exploitation of how .NET Framework activates COM objects, enabling malicious programs to execute commands with higher user permissions. To protect against this vulnerability, it's crucial for users to apply the latest updates and security patches released by Microsoft.

Affected Version(s)

Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2

Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2

Microsoft .NET Framework 3.5.1 Windows 7 for 32-bit Systems Service Pack 1

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-2020-1066-EXP
Created by cbwang505

cve-2020-1066
Created by xyddnljydd

References

https://portal.msrc.microsoft.com/en-US/security-guidance...
x_refsource_MISC

EPSS Score

29% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.