# CVE-2019-19343: Denial of service in Undertow

> A memory leak in Undertow's HttpOpenListener allows attackers to cause denial of service by holding remote connections indefinitely.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 23 Mar 2021
- **Updated:** 5 Aug 2024
- **Also known as:** DEBIAN-CVE-2019-19343, GHSA-4v4m-hgv5-x3qx, UBUNTU-CVE-2019-19343

## What is CVE-2019-19343?

CVE-2019-19343 is a high-severity denial of service vulnerability in Netapp Active Iq Unified Manager, published on 23 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A flaw was found in Undertow when using Remoting as shipped in Red Hat Jboss EAP before version 7.2.4. A memory leak in HttpOpenListener due to holding remote connections indefinitely may lead to denial of service. Versions before undertow 2.0.25.SP1 and jboss-remoting 5.0.14.SP1 are believed to be vulnerable.

Weakness: CWE-404 (Improper Resource Shutdown or Release), CWE-400 (Uncontrolled Resource Consumption)

## Which versions are affected by CVE-2019-19343?

It affects 4 products.


Products: Netapp Active Iq Unified Manager, Redhat Jboss-Remoting, Redhat Jboss Enterprise Application Platform, Redhat Undertow.

## How do I fix CVE-2019-19343?

Upgrade to a fixed version.

## Is CVE-2019-19343 being exploited?

There is no known exploitation of CVE-2019-19343 in the wild and no public exploit code.

## Other vulnerabilities in Netapp Active Iq Unified Manager

- [CVE-2022-31692](https://insights.sbomify.com/CVE-2022-31692/): Spring Security authorization rules can be bypassed via forward or include dispatcher types (critical 9.8)
- [CVE-2022-2526](https://insights.sbomify.com/CVE-2022-2526/): Use after free in systemd-resolved (critical 9.8)
- [CVE-2022-22978](https://insights.sbomify.com/CVE-2022-22978/): Authorization bypass in Spring Security (critical 9.8)
- [CVE-2021-22931](https://insights.sbomify.com/CVE-2021-22931/): Code injection in Node (critical 9.8)
- [CVE-2018-2938](https://insights.sbomify.com/CVE-2018-2938/): Code injection in Java (critical 9.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-19343 and fix it if it is affected.

What it is: CVE-2019-19343 is a high-severity denial of service vulnerability in Netapp Active Iq Unified Manager, published on 23 Mar 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-2019-19343 in the wild and no public exploit code.

Affected product: Netapp Active Iq Unified Manager. 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-2019-19343/ (Markdown: https://insights.sbomify.com/CVE-2019-19343/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-19343
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-19343
- OSV: https://osv.dev/vulnerability/CVE-2019-19343

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-19343/
Summaries are generated and may contain mistakes; the official description above is the record.