# CVE-2019-1644: Cisco IoT Field Network Director Resource Exhaustion Denial of Service Vulnerability

> Unauthenticated remote attackers can cause denial of service by exhausting system resources via high-rate UDP packets in Cisco IoT Field Network Director.

- **Severity:** High 7.5 (`CVSS:3.0/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:** No
- **Published:** 23 Jan 2019
- **Updated:** 19 Nov 2024
- **Also known as:** GHSA-4644-gg9v-fr7w

## What is CVE-2019-1644?

CVE-2019-1644 is a high-severity denial of service vulnerability in Cisco IoT Field Network Director (IoT-FND), published on 23 Jan 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability in the UDP protocol implementation for Cisco IoT Field Network Director (IoT-FND) could allow an unauthenticated, remote attacker to exhaust system resources, resulting in a denial of service (DoS) condition. The vulnerability is due to improper resource management for UDP ingress packets. An attacker could exploit this vulnerability by sending a high rate of UDP packets to an affected system within a short period of time. A successful exploit could allow the attacker to exhaust available system resources, resulting in a DoS condition.

Weakness: CWE-770 (Allocation of Resources Without Limits or Throttling), CWE-400 (Uncontrolled Resource Consumption)

## Which versions are affected by CVE-2019-1644?

It affects 1 product.


Products: Cisco Iot Field Network Director.

## How do I fix CVE-2019-1644?

No fix has been published for CVE-2019-1644 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-1644 being exploited?

There is no known exploitation of CVE-2019-1644 in the wild and no public exploit code.

## Other vulnerabilities in Cisco IoT Field Network Director (IoT-FND)

- [CVE-2020-3531](https://insights.sbomify.com/CVE-2020-3531/): Cisco IoT Field Network Director Unauthenticated REST API Vulnerability (critical 9.8)
- [CVE-2018-0270](https://insights.sbomify.com/CVE-2018-0270/): Cross-site request forgery in Cisco IoT Field Network Director (high 8.8)
- [CVE-2020-26072](https://insights.sbomify.com/CVE-2020-26072/): Cisco IoT Field Network Director SOAP API Authorization Bypass Vulnerability (high 8.7)
- [CVE-2026-20167](https://insights.sbomify.com/CVE-2026-20167/): Cisco IoT Field Network Director Remote Device Denial of Service Vulnerability (high 7.7)
- [CVE-2020-3392](https://insights.sbomify.com/CVE-2020-3392/): Cisco IoT Field Network Director Missing API Authentication Vulnerability (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-1644 and fix it if it is affected.

What it is: CVE-2019-1644 is a high-severity denial of service vulnerability in Cisco IoT Field Network Director (IoT-FND), published on 23 Jan 2019. 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-2019-1644 in the wild and no public exploit code.

Affected product: Cisco IoT Field Network Director (IoT-FND). 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-2019-1644/ (Markdown: https://insights.sbomify.com/CVE-2019-1644/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-1644
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-1644
- OSV: https://osv.dev/vulnerability/CVE-2019-1644

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From sbomify Insights: https://insights.sbomify.com/CVE-2019-1644/
Summaries are generated and may contain mistakes; the official description above is the record.