CVE-2020-0601
Microsoft Windows CryptoAPI Spoofing Vulnerability
CVSS
—
No CVSS
EPSS
89.4%
p100
KEV
YES
Nov 3, 2021
Exploit Today
80
0-100
Published: — · Last modified: —
Product
Microsoft / Windows
Vulnerability
Microsoft Windows CryptoAPI Spoofing Vulnerability
Added to KEV
Nov 3, 2021
Remediate by
May 3, 2022
Known ransomware use
No
Summary description
Microsoft Windows CryptoAPI (Crypt32.dll) contains a spoofing vulnerability in the way it 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. A successful exploit could also allow the attacker to conduct man-in-the-middle attacks and decrypt confidential information on user connections to the affected software. The vulnerability is also known under the moniker of CurveBall.
Required action
Apply updates per vendor instructions.
Notes
Reference CISA's ED 20-02 (https://www.cisa.gov/news-events/directives/ed-20-02-mitigate-windows-vulnerabilities-january-2020-patch-tuesday) for further guidance and requirements. Note: The due date for addressing this vulnerability aligns with the requirements outlined in ED 20-02. https://nvd.nist.gov/vuln/detail/CVE-2020-0601