# CVE-2019-9583: Denial of service in n/a

> Attackers can obtain session IDs without login, enabling Denial of Service and facilitating further attacks on Homematic CCU2 and CCU3 devices.

- **Severity:** High 8.2 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/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:** 14 Aug 2019
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-49c8-8f9w-rcc6

## What is CVE-2019-9583?

CVE-2019-9583 is a high-severity denial of service vulnerability in n/a, published on 14 Aug 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

eQ-3 Homematic CCU2 and CCU3 obtain session IDs without login. This allows a Denial of Service and is a starting point for other attacks. Affected versions for CCU2: 2.35.16, 2.41.5, 2.41.8, 2.41.9, 2.45.6, 2.45.7, 2.47.10, 2.47.12, 2.47.15. Affected versions for CCU3: 3.41.11, 3.43.16, 3.45.5, 3.45.7, 3.47.10, 3.47.15.

Weakness: CWE-400 (Uncontrolled Resource Consumption)

## Which versions are affected by CVE-2019-9583?

It affects 2 products.


Products: Eq-3 Homematic Ccu2 Firmware, Eq-3 Homematic Ccu3 Firmware.

## How do I fix CVE-2019-9583?

No fix has been published for CVE-2019-9583 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-9583 being exploited?

There is no known exploitation of CVE-2019-9583 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2021-33032](https://insights.sbomify.com/CVE-2021-33032/): Command injection in n/a (critical 10.0)
- [CVE-2019-18937](https://insights.sbomify.com/CVE-2019-18937/): Command injection in n/a (critical 9.8)
- [CVE-2019-18938](https://insights.sbomify.com/CVE-2019-18938/): Code injection in n/a (critical 9.8)
- [CVE-2019-18939](https://insights.sbomify.com/CVE-2019-18939/): Command injection in n/a (critical 9.8)
- [CVE-2019-16199](https://insights.sbomify.com/CVE-2019-16199/): Auth bypass in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-9583 and fix it if it is affected.

What it is: CVE-2019-9583 is a high-severity denial of service vulnerability in n/a, published on 14 Aug 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-2019-9583 in the wild and no public exploit code.

Affected product: n/a. 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-2019-9583/ (Markdown: https://insights.sbomify.com/CVE-2019-9583/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-9583
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-9583
- OSV: https://osv.dev/vulnerability/CVE-2019-9583

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-9583/
Summaries are generated and may contain mistakes; the official description above is the record.