# CVE-2004-0306: Misconfiguration in n/a

> Remote attackers can read or modify system files via default TFTP service on Cisco ONS devices, requiring firmware upgrades to secure the configuration.

- **Severity:** Medium 5.0 (`AV:N/AC:L/Au:N/C:N/I:P/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 1 Sep 2004
- **Updated:** 8 Aug 2024
- **Also known as:** GHSA-h4v9-xfr4-ch4g

## What is CVE-2004-0306?

CVE-2004-0306 is a medium-severity vulnerability in n/a, published on 1 Sep 2004. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Cisco ONS 15327 before 4.1(3), ONS 15454 before 4.6(1), ONS 15454 SD before 4.1(3), and Cisco ONS 15600 before 1.3(0) enable TFTP service on UDP port 69 by default, which allows remote attackers to GET or PUT ONS system files on the current active TCC in the /flash0 or /flash1 directories.

## Which versions are affected by CVE-2004-0306?

It affects 1 product.


Products: Cisco Optical Networking Systems Software.

## How do I fix CVE-2004-0306?

No fix has been published for CVE-2004-0306 yet. Limit exposure of the affected software until one is available.

## Is CVE-2004-0306 being exploited?

There is no known exploitation of CVE-2004-0306 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2004-0308](https://insights.sbomify.com/CVE-2004-0308/): Auth bypass in n/a (critical 10.0)
- [CVE-2002-1558](https://insights.sbomify.com/CVE-2002-1558/): Hardcoded credentials in n/a (critical 10.0)
- [CVE-2004-1436](https://insights.sbomify.com/CVE-2004-1436/): Auth bypass in n/a (high 7.5)
- [CVE-2002-1553](https://insights.sbomify.com/CVE-2002-1553/): Auth bypass in n/a (high 7.5)
- [CVE-2004-1432](https://insights.sbomify.com/CVE-2004-1432/): Denial of service in n/a (medium 5.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2004-0306 and fix it if it is affected.

What it is: CVE-2004-0306 is a medium-severity vulnerability in n/a, published on 1 Sep 2004. 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-2004-0306 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-2004-0306/ (Markdown: https://insights.sbomify.com/CVE-2004-0306/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2004-0306
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2004-0306
- OSV: https://osv.dev/vulnerability/CVE-2004-0306

---
From sbomify Insights: https://insights.sbomify.com/CVE-2004-0306/
Summaries are generated and may contain mistakes; the official description above is the record.