Jan 2020:
CVE-2020-0601 Published on January 14, 2020

A spoofing vulnerability exists in the way Windows CryptoAPI (Crypt32.dll) validates Elliptic Curve Cryptography (ECC) certificates.An attacker could exploit the vulnerability by using a spoofed code-signing certificate to sign a malicious executable, making it appear the file was from a trusted, legitimate source, aka 'Windows CryptoAPI Spoofing Vulnerability'.

NVD

Known Exploited Vulnerability

This Microsoft Windows 10 API/ECC Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. A spoofing vulnerability exists in the way Windows CryptoAPI (Crypt32.dll) validates Elliptic Curve Cryptography (ECC) certificates. An attacker could exploit the vulnerability by using a spoofed code-signing certificate to sign a malicious executable, making it appear the file was from a trusted, legitimate source, aka 'Windows CryptoAPI Spoofing Vulnerability'.

The following remediation steps are recommended / required by January 29, 2020: Apply updates per vendor instructions.

Vulnerability Analysis

CVE-2020-0601 can be exploited with network access, requires user interaction. This vulnerability is considered to have a low attack complexity. This vulnerability is known to be actively exploited by threat actors. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality and integrity, and no impact on availability.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
REQUIRED
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
NONE

Weakness Type

Improper Certificate Validation

The software does not validate, or incorrectly validates, a certificate. When a certificate is invalid or malicious, it might allow an attacker to spoof a trusted entity by interfering in the communication path between the host and client. The software might connect to a malicious host while believing it is a trusted host, or the software might be deceived into accepting spoofed data that appears to originate from a trusted host.


Products Associated with CVE-2020-0601

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Microsoft Windows 10
 
Microsoft Windows Server 2016
 
Microsoft Windows Server 2019
 
Microsoft Windows Server 1803
 
Microsoft Windows 10 1507
 
Microsoft Windows Server 1909
 
Microsoft Windows 10 1909
 
Microsoft Windows Server 1903
 
Microsoft Windows 10 1903
 
Microsoft Windows 10 1709
 
Microsoft Windows 10 1803
 
Microsoft Windows
 
Microsoft Windows Server
 

Affected Versions

Microsoft Windows: Microsoft Windows Server: Microsoft Windows 10 Version 1903 for 32-bit Systems: Microsoft Windows 10 Version 1903 for x64-based Systems: Microsoft Windows 10 Version 1903 for ARM64-based Systems: Microsoft Windows Server, version 1903 (Server Core installation): Microsoft Windows 10 Version 1909 for 32-bit Systems: Microsoft Windows 10 Version 1909 for x64-based Systems: Microsoft Windows Server, version 1909 (Server Core installation): Microsoft Windows 10 Version 1909 for ARM64-based Systems:

Exploit Probability

EPSS
94.09%
Percentile
99.90%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.