Vulnerability CVE-2020-0601 - CERT Civis.Net

Vulnerability Name:

CVE-2020-0601 (CCN-173807)

Assigned:

2019-11-04

Published:

2020-01-14

Updated:

2022-08-12

Summary:

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'.

CVSS v3 Severity:

8.1 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N)
7.3 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N/E:P/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): Required
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): High Integrity (I): High Availibility (A): None

8.1 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N)
7.3 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N/E:P/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): Required
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): High Integrity (I): High Availibility (A): None

CVSS v2 Severity:

5.8 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:P/I:P/A:N)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Medium Authentication (Au): None
Impact Metrics:	Confidentiality (C): Partial Integrity (I): Partial Availibility (A): None

8.5 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:C/I:C/A:N)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Athentication (Au): Single_Instance
Impact Metrics:	Confidentiality (C): Complete Integrity (I): Complete Availibility (A): None

Vulnerability Type:

Vulnerability Consequences:

Gain Access

References:

Source: MITRE
Type: CNA
CVE-2020-0601

Source: MISC
Type: Third Party Advisory, VDB Entry
http://packetstormsecurity.com/files/155960/CurveBall-Microsoft-Windows-CryptoAPI-Spoofing-Proof-Of-Concept.html

Source: MISC
Type: Third Party Advisory, VDB Entry
http://packetstormsecurity.com/files/155961/CurveBall-Microsoft-Windows-CryptoAPI-Spoofing-Proof-Of-Concept.html

Source: CCN
Type: US-CERT VU#849224
Microsoft Windows CryptoAPI fails to properly validate ECC certificate chains

Source: CCN
Type: Google Chrome Releases Web site
Stable Channel Update for Desktop

Source: XF
Type: UNKNOWN
ms-cryptoapi-cve20200601-spoofing(173807)

Source: CCN
Type: Packet Storm Security [01-16-2020]
CurveBall Microsoft Windows CryptoAPI Spoofing Proof Of Concept

Source: CCN
Type: Packet Storm Security [01-16-2020]
CurveBall Microsoft Windows CryptoAPI Spoofing Proof Of Concept

Source: N/A
Type: Patch, Vendor Advisory
N/A

Source: CCN
Type: Microsoft Security TechCenter - January 2020
Microsoft SharePoint Elevation of Privilege Vulnerability

Source: CCN
Type: CYBERSECURITY & INFRASTRUCTURE SECURITY AGENCY
KNOWN EXPLOITED VULNERABILITIES CATALOG

Vulnerable Configuration:

Configuration 1:

cpe:/o:microsoft:windows_10:1607:*:*:*:*:*:*:*

OR cpe:/o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*

OR cpe:/o:microsoft:windows_10:-:*:*:*:*:*:*:*

OR cpe:/o:microsoft:windows_10:1709:*:*:*:*:*:*:*

OR cpe:/o:microsoft:windows_10:1803:*:*:*:*:*:*:*

OR cpe:/o:microsoft:windows_server_1803:-:*:*:*:*:*:x64:*

OR cpe:/o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*

OR cpe:/o:microsoft:windows_10:1809:*:*:*:*:*:*:*

OR cpe:/o:microsoft:windows_server_1903:-:*:*:*:*:*:x64:*

OR cpe:/o:microsoft:windows_10:1903:*:*:*:*:*:*:*

OR cpe:/o:microsoft:windows_10:1909:*:*:*:*:*:*:*

OR cpe:/o:microsoft:windows_server_1909:-:*:*:*:*:*:x64:*

Configuration 2:

cpe:/a:golang:go:*:*:*:*:*:*:*:* (Version >= 1.13 and < 1.13.7)

OR cpe:/a:golang:go:*:*:*:*:*:*:*:* (Version >= 1.12 and < 1.12.16)

AND

cpe:/o:microsoft:windows:-:*:*:*:*:*:*:*

Configuration CCN 1:

cpe:/o:microsoft:windows_10:-:*:*:*:*:*:x32:*

OR cpe:/o:microsoft:windows_10:::~~~~x64~:*:*:*:*:*

OR cpe:/o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*

OR cpe:/o:microsoft:windows_server:1803:*:*:*:*:*:*:*

OR cpe:/o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*

OR cpe:/o:microsoft:windows_10:-:*:*:*:*:*:arm64:*

OR cpe:/o:microsoft:windows_server:1903:*:*:*:*:*:*:*

OR cpe:/o:microsoft:windows_server:1909:*:*:*:*:*:*:*

OR cpe:/a:google:chrome:79:*:*:*:*:*:*:*

Denotes that component is vulnerable