CVE-2020-0601

CVE Published	2020-01-14
Related CWE(s)	CWE-295: Improper Certificate Validation
Related Vendor(s)	microsoft, golang
Related Product(s)	windows_server_2019, windows_10, windows_server_2016, go
Exploitation Reported (CISA KEV)	2021-11-03
CVSS 3 Base Score	8.1 (HIGH)
CVSS 3 Attack Complexity	LOW
CVSS 3 Attack Vector	NETWORK

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'.

Cyber Threat Graph Context

Explore how this CVE relates to the wider threat graph

Associated CAPEC Patterns

Creating a Rogue Certification Authority Certificate (CAPEC-459)

An adversary exploits a weakness resulting from using a hashing algorithm with weak collision resistance to generate certificate signing requests (CSR) that contain collision blocks in their "to be signed" parts. The adversary submits one CSR to be signed by a trusted certificate authority then uses the signed blob to make a second certificate appear signed by said certificate authority. Due to the hash collision, both certificates, though different, hash to the same value and so the signed blob works just as well in the second certificate. The net effect is that the adversary's second X.509 certificate, which the Certification Authority has never seen, is now signed and validated by that Certification Authority.

Signature Spoofing by Improper Validation (CAPEC-475)

An adversary exploits a cryptographic weakness in the signature verification algorithm implementation to generate a valid signature without knowing the key.

References

CVE-2020-0601

Cyber Threat Graph Context

Associated CAPEC Patterns

Creating a Rogue Certification Authority Certificate (CAPEC-459)

Signature Spoofing by Improper Validation (CAPEC-475)

References

CVE.org

NIST National Vulnerability Database

CISA Known Exploited Vulnerabilities