# CVE-2024-34489: Ryu Infinite Loop vulnerability

> Attackers can cause a denial of service via an infinite loop in the OFPHello parser of Faucet SDN Ryu.

- **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:** No
- **Published:** 5 May 2024
- **Updated:** 2 Aug 2024
- **Also known as:** GHSA-59p2-v62x-gxj8, PYSEC-2026-1877

## What is CVE-2024-34489?

CVE-2024-34489 is a high-severity denial of service vulnerability in n/a, published on 5 May 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

OFPHello in parser.py in Faucet SDN Ryu 4.34 allows attackers to cause a denial of service (infinite loop) via length=0.

Weakness: CWE-835 (Loop with Unreachable Exit Condition)

## Which versions are affected by CVE-2024-34489?

3 open source packages ship an affected version, including ryu. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `ryu` | PyPI | All versions to 4.34 | None |
| `ryu` | PyPI | All versions to 4.34 | None |
| `ryu` | PyPI | All versions to 4.34 | None |

Products: Facuet Ryu.

## How do I fix CVE-2024-34489?

No fix has been published for CVE-2024-34489 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-34489 being exploited?

There is no known exploitation of CVE-2024-34489 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2024-34483](https://insights.sbomify.com/CVE-2024-34483/): Ryu Infinite Loop vulnerability (high 7.5)
- [CVE-2024-34486](https://insights.sbomify.com/CVE-2024-34486/): Ryu Infinite Loop vulnerability (high 7.5)
- [CVE-2024-34487](https://insights.sbomify.com/CVE-2024-34487/): Ryu Infinite Loop vulnerability (high 7.5)
- [CVE-2024-34488](https://insights.sbomify.com/CVE-2024-34488/): Ryu Infinite Loop vulnerability (high 7.5)
- [CVE-2024-28732](https://insights.sbomify.com/CVE-2024-28732/): Ryu Infinite Loop vulnerability (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-34489 and fix it if it is affected.

What it is: CVE-2024-34489 is a high-severity denial of service vulnerability in n/a, published on 5 May 2024. 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-2024-34489 in the wild and no public exploit code.

Affected packages and fixed versions:
- ryu (PyPI): affected all versions up to 4.34; no fix listed
- ryu (PyPI): affected all versions up to 4.34; no fix listed
- ryu (PyPI): affected all versions up to 4.34; no fix listed

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-2024-34489/ (Markdown: https://insights.sbomify.com/CVE-2024-34489/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-34489
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-34489
- OSV: https://osv.dev/vulnerability/CVE-2024-34489

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-34489/
Summaries are generated and may contain mistakes; the official description above is the record.