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CVE-2020-11005— Internal NCryptDecrypt method could be used externally from WindowsHello library.

Quick assessment

Affected
SeppPenner WindowsHello
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WindowsHello是一款用于与Windows Hello生物特征面部识别库一同使用的解锁开源库。 WindowsHello open source library (NuGet HaemmerElectronics.SeppPenner.WindowsHello) 1.0.4之前版本中存在加密问题漏洞。攻击者可利用该漏洞无需身份验证便可解密加密的数据。

CVSS 5.1 · Medium EPSS 0.23% · P14

Possible ATT&CK Techniques 1 AI

T1562.001
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I. Basic Information for CVE-2020-11005

Vulnerability Information
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Vulnerability Title
Internal NCryptDecrypt method could be used externally from WindowsHello library.
Source: CVE Program / CVE List V5
Vulnerability Description
The WindowsHello open source library (NuGet HaemmerElectronics.SeppPenner.WindowsHello), before version 1.0.4, has a vulnerability where encrypted data could potentially be decrypted without needing authentication. If the library is used to encrypt text and write the output to a txt file, another executable could be able to decrypt the text using the static method NCryptDecrypt from this same library without the need to use Windows Hello Authentication again. This has been patched in version 1.0.4.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用候选路径或通道进行的认证绕过
Source: CVE Program / CVE List V5
Vulnerability Title
WindowsHello open source library 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WindowsHello是一款用于与Windows Hello生物特征面部识别库一同使用的解锁开源库。 WindowsHello open source library (NuGet HaemmerElectronics.SeppPenner.WindowsHello) 1.0.4之前版本中存在加密问题漏洞。攻击者可利用该漏洞无需身份验证便可解密加密的数据。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
SeppPenner WindowsHello < 1.0.4 -

II. Public POCs for CVE-2020-11005

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III. Intelligence Information for CVE-2020-11005

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Vendor Advisories for CVE-2020-11005 (1)

Other References for CVE-2020-11005 (1)

IV. Related Vulnerabilities

Same weakness: CWE-288

V. Comments for CVE-2020-11005

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