# CVE-2000-0389: Memory corruption in n/a

> Remote attackers can exploit a buffer overflow in Kerberos to gain root privileges on affected systems.

- **Severity:** Critical 10.0 (`AV:N/AC:L/Au:N/C:C/I:C/A:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 12 Jul 2000
- **Updated:** 8 Aug 2024
- **Also known as:** GHSA-4jvw-4fhr-v7mv

## What is CVE-2000-0389?

CVE-2000-0389 is a critical memory corruption vulnerability in Mit Kerberos 5, published on 12 Jul 2000. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Buffer overflow in krb_rd_req function in Kerberos 4 and 5 allows remote attackers to gain root privileges.

## Which versions are affected by CVE-2000-0389?

It affects 5 products.


Products: Cygnus Cygnus Network Security, Cygnus Kerbnet, Mit Kerberos, Mit Kerberos 5, Redhat Linux.

## How do I fix CVE-2000-0389?

No fix has been published for CVE-2000-0389 yet. Limit exposure of the affected software until one is available.

## Is CVE-2000-0389 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2000-0389 exists.

Public exploit code:

- Cygnus Network Security 4.0/KerbNet 5.0 / MIT Kerberos 4/5 / RedHat 6.2 - Compatibility 'krb_rd_req()' Remote Buffer Overflow (3) (exploitdb)
- Cygnus Network Security 4.0/KerbNet 5.0 / MIT Kerberos 4/5 / RedHat 6.2 - Compatibility 'krb_rd_req()' Remote Buffer Overflow (1) (exploitdb)
- Cygnus Network Security 4.0/KerbNet 5.0 / MIT Kerberos 4/5 / RedHat 6.2 - Compatibility 'krb_rd_req()' Local Buffer Overflow (2) (exploitdb)

## Other vulnerabilities in Mit Kerberos 5

- [CVE-2000-0390](https://insights.sbomify.com/CVE-2000-0390/): Memory corruption in n/a (critical 10.0)
- [CVE-2000-0391](https://insights.sbomify.com/CVE-2000-0391/): Memory corruption in n/a (critical 10.0)
- [CVE-2000-0392](https://insights.sbomify.com/CVE-2000-0392/): Memory corruption in n/a (high 7.2)
- [CVE-2000-0549](https://insights.sbomify.com/CVE-2000-0549/): Denial of service in n/a (medium 5.0)
- [CVE-2000-0550](https://insights.sbomify.com/CVE-2000-0550/): Use after free in n/a (medium 5.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2000-0389 and fix it if it is affected.

What it is: CVE-2000-0389 is a critical memory corruption vulnerability in Mit Kerberos 5, published on 12 Jul 2000. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2000-0389 exists.

Affected product: Mit Kerberos 5. 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-2000-0389/ (Markdown: https://insights.sbomify.com/CVE-2000-0389/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2000-0389
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2000-0389
- OSV: https://osv.dev/vulnerability/CVE-2000-0389

---
From sbomify Insights: https://insights.sbomify.com/CVE-2000-0389/
Summaries are generated and may contain mistakes; the official description above is the record.