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Internal NCryptDecrypt method could be used externally from WindowsHello library.

Moderate severity GitHub Reviewed Published Apr 14, 2020 in SeppPenner/WindowsHello • Updated Jan 9, 2023

Package

nuget HaemmerElectronics.SeppPenner.WindowsHello (NuGet)

Affected versions

< 1.0.4

Patched versions

1.0.4

Description

Impact

Every user of the library before version 1.0.4.

Patches

Patched in 1.0.4+.

Workarounds

None.

References

SeppPenner/WindowsHello#3

For more information

It this 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.

References

@SeppPenner SeppPenner published to SeppPenner/WindowsHello Apr 14, 2020
Reviewed Apr 14, 2020
Published to the GitHub Advisory Database Apr 14, 2020
Last updated Jan 9, 2023

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Local
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS score

0.044%
(14th percentile)

Weaknesses

CVE ID

CVE-2020-11005

GHSA ID

GHSA-wvpv-ffcv-r6cw

Source code

No known source code
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