# CVE-2003-0039: Denial of service in n/a

> Remote attackers can cause a denial of service in ISC dhcrelay by sending a specific BOOTP packet that triggers an infinite loop.

- **Severity:** Medium 5.0 (`AV:N/AC:L/Au:N/C:N/I:N/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 1 Sep 2004
- **Updated:** 8 Aug 2024
- **Also known as:** DSA-245, GHSA-h2v9-xvmg-qcc7

## What is CVE-2003-0039?

CVE-2003-0039 is a medium-severity denial of service 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

ISC dhcrelay (dhcp-relay) 3.0rc9 and earlier, and possibly other versions, allows remote attackers to cause a denial of service (packet storm) via a certain BOOTP packet that is forwarded to a broadcast MAC address, causing an infinite loop that is not restricted by a hop count.

## Which versions are affected by CVE-2003-0039?

It affects 1 product.


Products: Isc Dhcpd.

## How do I fix CVE-2003-0039?

Upgrade to a fixed version.

## Is CVE-2003-0039 being exploited?

There is no known exploitation of CVE-2003-0039 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2004-1006](https://insights.sbomify.com/CVE-2004-1006/): Code injection in n/a (critical 10.0)
- [CVE-2002-0702](https://insights.sbomify.com/CVE-2002-0702/): Code injection in n/a (critical 10.0)
- [CVE-2003-0026](https://insights.sbomify.com/CVE-2003-0026/): Memory corruption in n/a (high 7.5)
- [CVE-2019-6470](https://insights.sbomify.com/CVE-2019-6470/): dhcpd: use-after-free error leads crash in IPv6 mode when using mismatched BIND libraries (medium 6.5)
- [CVE-2006-3122](https://insights.sbomify.com/CVE-2006-3122/): Denial of service in n/a (medium 5.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2003-0039 and fix it if it is affected.

What it is: CVE-2003-0039 is a medium-severity denial of service 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-2003-0039 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-2003-0039/ (Markdown: https://insights.sbomify.com/CVE-2003-0039/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2003-0039
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2003-0039
- OSV: https://osv.dev/vulnerability/CVE-2003-0039

---
From sbomify Insights: https://insights.sbomify.com/CVE-2003-0039/
Summaries are generated and may contain mistakes; the official description above is the record.