# CVE-2001-0518: Denial of service in n/a

> Attackers can cause a denial of service in Oracle database listeners by sending incomplete fragmented commands, requiring an upgrade to mitigate.

- **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:** No
- **Published:** 9 Mar 2002
- **Updated:** 8 Aug 2024
- **Also known as:** GHSA-fhxw-w85p-hp94

## What is CVE-2001-0518?

CVE-2001-0518 is a medium-severity denial of service vulnerability in Oracle Oracle9i, published on 9 Mar 2002. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Oracle listener before Oracle 9i allows attackers to cause a denial of service by repeatedly sending the first portion of a fragmented Oracle command without sending the remainder of the command, which causes the listener to hang.

## Which versions are affected by CVE-2001-0518?

It affects 1 product.


Products: Oracle Oracle9i.

## How do I fix CVE-2001-0518?

No fix has been published for CVE-2001-0518 yet. Limit exposure of the affected software until one is available.

## Is CVE-2001-0518 being exploited?

There is no known exploitation of CVE-2001-0518 in the wild and no public exploit code.

## Other vulnerabilities in Oracle Oracle9i

- [CVE-2003-1208](https://insights.sbomify.com/CVE-2003-1208/): Memory corruption in n/a (critical 10.0)
- [CVE-2002-1264](https://insights.sbomify.com/CVE-2002-1264/): Memory corruption in n/a (high 7.5)
- [CVE-2002-0571](https://insights.sbomify.com/CVE-2002-0571/): Missing authorization in n/a (high 7.5)
- [CVE-2002-0965](https://insights.sbomify.com/CVE-2002-0965/): Memory corruption in n/a (high 7.5)
- [CVE-2002-0509](https://insights.sbomify.com/CVE-2002-0509/): Denial of service in n/a (medium 5.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2001-0518 and fix it if it is affected.

What it is: CVE-2001-0518 is a medium-severity denial of service vulnerability in Oracle Oracle9i, published on 9 Mar 2002. 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-2001-0518 in the wild and no public exploit code.

Affected product: Oracle Oracle9i. 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-2001-0518/ (Markdown: https://insights.sbomify.com/CVE-2001-0518/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2001-0518
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2001-0518
- OSV: https://osv.dev/vulnerability/CVE-2001-0518

---
From sbomify Insights: https://insights.sbomify.com/CVE-2001-0518/
Summaries are generated and may contain mistakes; the official description above is the record.