CVE-2020-0601

high

Description

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'.

References

http://packetstormsecurity.com/files/155961/CurveBall-Microsoft-Windows-CryptoAPI-Spoofing-Proof-Of-Concept.html

http://packetstormsecurity.com/files/155960/CurveBall-Microsoft-Windows-CryptoAPI-Spoofing-Proof-Of-Concept.html

https://media.defense.gov/2020/Oct/20/2002519884/-1/-1/0/CSA_CHINESE_EXPLOIT_VULNERABILITIES_UOO179811.PDF

https://www.tenable.com/cyber-exposure/2020-threat-landscape-retrospective

https://media.defense.gov/2020/Jan/14/2002234275/-1/-1/0/CSA-WINDOWS-10-CRYPT-LIB-20190114.PDF

https://www.tenable.com/blog/government-agencies-warn-of-state-sponsored-actors-exploiting-publicly-known-vulnerabilities

https://www.tenable.com/blog/cve-2020-0601-nsa-reported-spoofing-vulnerability-in-windows-cryptoapi

https://www.tenable.com/blog/microsoft-s-january-2020-patch-tuesday-kicks-off-the-new-year-with-49-new-cves

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0601

Details

Source: Mitre, NVD

Published: 2020-01-14

Updated: 2025-04-10

Named Vulnerability: CurveBallNamed Vulnerability: ChainOfFoolsNamed Vulnerability: Chain of FoolsNamed Vulnerability: CURVEBALLKnown Exploited Vulnerability (KEV)

Risk Information

CVSS v2

Base Score: 5.8

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 8.1

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Severity: High

EPSS

EPSS: 0.94034

Detections

Analytics