Vulnerability · Published Apr 14, 2020 · Assigned by GitHub_M
CVE-2020-11005Internal NCryptDecrypt method could be used externally from WindowsHello library.
Medium 5.1
In plain English
A medium-severity authentication bypass in WindowsHello from SeppPenner. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 14% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| NuGet | haemmerelectronics.sepppenner.windowshello | 1.0.4 | GHSA-wvpv-ffcv-r6cw |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| SeppPenner | WindowsHello | < 1.0.4 |
Weakness: CWE-288 · Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
References
- https://github.com/SeppPenner/WindowsHello/security/advisories/GHSA-wvpv-ffcv-r6cw x_refsource_CONFIRM
- https://github.com/SeppPenner/WindowsHello/issues/3 x_refsource_MISC