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'.

From the Tenable Blog

CVE-2020-0601: NSA Reported Spoofing Vulnerability in Windows CryptoAPI
CVE-2020-0601: NSA Reported Spoofing Vulnerability in Windows CryptoAPI

Published: 2020-01-14

Microsoft kicks off the first Patch Tuesday of 2020 with the disclosure of CVE-2020-0601, a highly critical flaw in the cryptographic library for Windows. UPDATE 01/16/2020: This blog post has been updated to reflect the availability of proof-of-concept code for CVE-2020-0601, which is being referred to as CurveBall or Chain of Fools.

References

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

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

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

Details

Source: Mitre, NVD

Published: 2020-01-14

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