CVE-2020-11005 Internal NCryptDecrypt method could be used externally from WindowsHello library.
Attackers can bypass Windows Hello authentication to decrypt sensitive data using an exposed internal method in the WindowsHello library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-11005?
CVE-2020-11005 is a medium-severity vulnerability in SeppPenner WindowsHello, published on 14 Apr 2020. It can only be exploited from the same machine or local network, with no action from the victim.
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.
Which versions are affected by CVE-2020-11005?
2 open source packages ship an affected version, including HaemmerElectronics.SeppPenner.WindowsHello. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
HaemmerElectronics.SeppPenner.WindowsHello NuGet | All versions | 1.0.4 |
HaemmerElectronics.SeppPenner.WindowsHello NuGet | All versions | 1.0.4 |
Products include Windowshello Project Windowshello.
How do I fix CVE-2020-11005?
Upgrade HaemmerElectronics.SeppPenner.WindowsHello to 1.0.4 or later.
Is CVE-2020-11005 being exploited?
There is no known exploitation of CVE-2020-11005 in the wild and no public exploit code.
Sources
Also known as GHSA-wvpv-ffcv-r6cw.