CVE-2020-0601 : A spoofing vulnerability exists in the way Windows CryptoAPI (Crypt32.dll) valid

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'.

Published 2020-01-14 23:15:30

Updated 2025-04-10 16:54:50

Source Microsoft Corporation

View at NVD, CVE.org

Products affected by CVE-2020-0601

Microsoft » Windows Server 2016 » Version: N/A
cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*
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Microsoft » Windows Server 1803 » Version: N/A
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Microsoft » Windows Server 2019 » Version: N/A
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Microsoft » Windows 10 1607 » Version: N/A For X64
cpe:2.3:o:microsoft:windows_10_1607:-:*:*:*:*:*:x64:*
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Microsoft » Windows 10 1607 » Version: N/A For X86
cpe:2.3:o:microsoft:windows_10_1607:-:*:*:*:*:*:x86:*
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Microsoft » Windows 10 1809 » For Arm64
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:arm64:*
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Microsoft » Windows 10 1809 » For X86
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*
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Microsoft » Windows 10 1809 » For X64
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*
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Microsoft » Windows 10 1507 » Version: N/A For X64
cpe:2.3:o:microsoft:windows_10_1507:-:*:*:*:*:*:x64:*
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Microsoft » Windows 10 1507 » Version: N/A For X86
cpe:2.3:o:microsoft:windows_10_1507:-:*:*:*:*:*:x86:*
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Microsoft » Windows 10 1909 » Version: N/A For Arm64
cpe:2.3:o:microsoft:windows_10_1909:-:*:*:*:*:*:arm64:*
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Microsoft » Windows 10 1909 » Version: N/A For X64
cpe:2.3:o:microsoft:windows_10_1909:-:*:*:*:*:*:x64:*
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Microsoft » Windows 10 1909 » Version: N/A For X86
cpe:2.3:o:microsoft:windows_10_1909:-:*:*:*:*:*:x86:*
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Microsoft » Windows 10 1709 » Version: N/A For Arm64
cpe:2.3:o:microsoft:windows_10_1709:-:*:*:*:*:*:arm64:*
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Microsoft » Windows 10 1709 » Version: N/A For X64
cpe:2.3:o:microsoft:windows_10_1709:-:*:*:*:*:*:x64:*
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Microsoft » Windows 10 1709 » Version: N/A For X86
cpe:2.3:o:microsoft:windows_10_1709:-:*:*:*:*:*:x86:*
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Microsoft » Windows 10 1803 » Version: N/A For Arm64
cpe:2.3:o:microsoft:windows_10_1803:-:*:*:*:*:*:arm64:*
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Microsoft » Windows 10 1803 » Version: N/A For X64
cpe:2.3:o:microsoft:windows_10_1803:-:*:*:*:*:*:x64:*
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Microsoft » Windows 10 1803 » Version: N/A For X86
cpe:2.3:o:microsoft:windows_10_1803:-:*:*:*:*:*:x86:*
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Microsoft » Windows 10 1903 » Version: N/A For Arm64
cpe:2.3:o:microsoft:windows_10_1903:-:*:*:*:*:*:arm64:*
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Microsoft » Windows 10 1903 » Version: N/A For X64
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Microsoft » Windows 10 1903 » Version: N/A For X86
cpe:2.3:o:microsoft:windows_10_1903:-:*:*:*:*:*:x86:*
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Microsoft » Windows Server 1903 » Version: N/A
cpe:2.3:o:microsoft:windows_server_1903:-:*:*:*:*:*:*:*
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Microsoft » Windows Server 1909 » Version: N/A
cpe:2.3:o:microsoft:windows_server_1909:-:*:*:*:*:*:*:*
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Golang » GO
Versions from including (>=) 1.13 and before (<) 1.13.7
cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*
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When used together with: Microsoft » Windows » Version: N/A
Golang » GO
Versions from including (>=) 1.12 and before (<) 1.12.16
cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*
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When used together with: Microsoft » Windows » Version: N/A

CVE-2020-0601 is in the CISA Known Exploited Vulnerabilities Catalog

CISA vulnerability name:

Microsoft Windows CryptoAPI Spoofing Vulnerability

CISA required action:

Apply updates per vendor instructions.

CISA 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 fr

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

Added on 2021-11-03 Action due date 2020-01-29

Exploit prediction scoring system (EPSS) score for CVE-2020-0601

EPSS FAQ

93.91%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 100 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2020-0601

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source	First Seen
5.8	MEDIUM	AV:N/AC:M/Au:N/C:P/I:P/A:N	8.6	4.9	NIST
Access Vector: Network Access Complexity: Medium Authentication: None Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: None
8.1	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N	2.8	5.2	134c704f-9b21-4f2e-91b3-4a467353bcc0	2025-02-07
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: Required Scope: Unchanged Confidentiality: High Integrity: High Availability: None
8.1	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N	2.8	5.2	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: Required Scope: Unchanged Confidentiality: High Integrity: High Availability: None

CWE ids for CVE-2020-0601

CWE-295 Improper Certificate Validation

The product does not validate, or incorrectly validates, a certificate.
Assigned by:
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)
- nvd@nist.gov (Primary)

References for CVE-2020-0601

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

CVE-2020-0601 - Security Update Guide - Microsoft - Windows CryptoAPI Spoofing Vulnerability
Patch;Vendor Advisory
http://packetstormsecurity.com/files/155960/CurveBall-Microsoft-Windows-CryptoAPI-Spoofing-Proof-Of-Concept.html

CurveBall Microsoft Windows CryptoAPI Spoofing Proof Of Concept ≈ Packet Storm
Third Party Advisory;VDB Entry
http://packetstormsecurity.com/files/155961/CurveBall-Microsoft-Windows-CryptoAPI-Spoofing-Proof-Of-Concept.html

CurveBall Microsoft Windows CryptoAPI Spoofing Proof Of Concept ≈ Packet Storm
Third Party Advisory;VDB Entry