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

2020-04-1422:30:14

CWE-288

GitHub_M

www.cve.org

5.1 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

0.0004 Low

EPSS

Percentile

12.7%

JSON

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.

CNA Affected

[
  {
    "product": "WindowsHello",
    "vendor": "SeppPenner",
    "versions": [
      {
        "status": "affected",
        "version": "< 1.0.4"
      }
    ]
  }
]