# CVE-2004-0434: Memory corruption in n/a

> Remote attackers can execute arbitrary code on Heimdal Kerberos servers via a heap-based buffer overflow in the kadmind service.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 12 May 2004
- **Updated:** 8 Aug 2024
- **Also known as:** CVE-2004-0472, DEBIAN-CVE-2004-0434, DSA-504, GHSA-7p2h-6h3x-44v5

## What is CVE-2004-0434?

CVE-2004-0434 is a critical memory corruption vulnerability in Debian Debian Linux, published on 12 May 2004. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

k5admind (kadmind) for Heimdal allows remote attackers to execute arbitrary code via a Kerberos 4 compatibility administration request whose framing length is less than 2, which leads to a heap-based buffer overflow.

Weakness: CWE-131 (Incorrect Calculation of Buffer Size)

## Which versions are affected by CVE-2004-0434?

It affects 2 products.


Products: Debian Debian Linux, Heimdal Project Heimdal.

## How do I fix CVE-2004-0434?

Apply the vendor's patch.

## Is CVE-2004-0434 being exploited?

There is no known exploitation of CVE-2004-0434 in the wild and no public exploit code.

## Other vulnerabilities in Debian Debian Linux

- [CVE-2015-3306](https://insights.sbomify.com/CVE-2015-3306/): ProFTPD Improper Access Control (critical 10.0, exploited in the wild)
- [CVE-2025-49113](https://insights.sbomify.com/CVE-2025-49113/): RoundCube Webmail Deserialization of Untrusted Data (critical 9.9, exploited in the wild)
- [CVE-2026-24061](https://insights.sbomify.com/CVE-2026-24061/): GNU InetUtils Argument Injection (critical 9.8, exploited in the wild)
- [CVE-2025-39682](https://insights.sbomify.com/CVE-2025-39682/): Linux Kernel Improper Check for Unusual or Exceptional Conditions (critical 9.8, exploited in the wild)
- [CVE-2024-9680](https://insights.sbomify.com/CVE-2024-9680/): Mozilla Firefox Use-After-Free (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2004-0434 and fix it if it is affected.

What it is: CVE-2004-0434 is a critical memory corruption vulnerability in Debian Debian Linux, published on 12 May 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-2004-0434 in the wild and no public exploit code.

Affected product: Debian Debian Linux. 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-2004-0434/ (Markdown: https://insights.sbomify.com/CVE-2004-0434/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2004-0434
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2004-0434
- OSV: https://osv.dev/vulnerability/CVE-2004-0434

---
From sbomify Insights: https://insights.sbomify.com/CVE-2004-0434/
Summaries are generated and may contain mistakes; the official description above is the record.