# CVE-2021-43935: ICSMA-21-343-01 Hillrom Welch Allyn Cardio Products

> Attackers can bypass authentication in SSO-enabled cardiac devices by entering any active directory account without a password, gaining full access.

- **Severity:** High 8.1 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 15 Dec 2021
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-vv5r-9wcq-cqcm

## What is CVE-2021-43935?

CVE-2021-43935 is a high-severity authentication bypass vulnerability in Hillrom Welch Allyn Connex Cardio, published on 15 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The impacted products, when configured to use SSO, are affected by an improper authentication vulnerability. This vulnerability allows the application to accept manual entry of any active directory (AD) account provisioned in the application without supplying a password, resulting in access to the application as the supplied AD account, with all associated privileges.

Weakness: CWE-287 (Improper Authentication), CWE-288 (Authentication Bypass Using an Alternate Path or Channel)

## Which versions are affected by CVE-2021-43935?

It affects 7 products.


Products: Baxter Welch Allyn Connex Cardio, Baxter Welch Allyn Diagnostic Cardiology Suite, Baxter Welch Allyn Hscribe Holter Analysis System Firmware, Baxter Welch Allyn Q-Stress Cardiac Stress Testing System Firmware, Baxter Welch Allyn Rscribe Resting Ecg System, Baxter Welch Allyn Vision Express Holter Analysis System, Baxter Welch Allyn Xscribe Cardiac Stress Testing System Firmware.

## How do I fix CVE-2021-43935?

No fix has been published for CVE-2021-43935 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-43935 being exploited?

There is no known exploitation of CVE-2021-43935 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-43935 and fix it if it is affected.

What it is: CVE-2021-43935 is a high-severity authentication bypass vulnerability in Hillrom Welch Allyn Connex Cardio, published on 15 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-43935 in the wild and no public exploit code.

Affected product: Hillrom Welch Allyn Connex Cardio. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2021-43935/ (Markdown: https://insights.sbomify.com/CVE-2021-43935/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-43935
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-43935
- OSV: https://osv.dev/vulnerability/CVE-2021-43935

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-43935/
Summaries are generated and may contain mistakes; the official description above is the record.