# CVE-1999-0396: Race condition in n/a

> Remote attackers can cause denial of service in NetBSD TCP servers via a race condition between select and accept calls.

- **Severity:** Low 2.6 (`AV:N/AC:H/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:** 29 Sep 1999
- **Updated:** 1 Aug 2024
- **Also known as:** GHSA-6hqw-w28m-789c

## What is CVE-1999-0396?

CVE-1999-0396 is a low-severity vulnerability in Netbsd Netbsd, published on 29 Sep 1999. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A race condition between the select() and accept() calls in NetBSD TCP servers allows remote attackers to cause a denial of service.

## Which versions are affected by CVE-1999-0396?

It affects 2 products.


Products: Netbsd Netbsd, Openbsd Openbsd.

## How do I fix CVE-1999-0396?

No fix has been published for CVE-1999-0396 yet. Limit exposure of the affected software until one is available.

## Is CVE-1999-0396 being exploited?

There is no known exploitation of CVE-1999-0396 in the wild and no public exploit code.

## Other vulnerabilities in Netbsd Netbsd

- [CVE-2017-1000374](https://insights.sbomify.com/CVE-2017-1000374/): Security feature bypass in n/a (critical 9.8)
- [CVE-2017-1000375](https://insights.sbomify.com/CVE-2017-1000375/): Memory corruption in n/a (critical 9.8)
- [CVE-2017-1000378](https://insights.sbomify.com/CVE-2017-1000378/): Denial of service in n/a (critical 9.8)
- [CVE-2015-8212](https://insights.sbomify.com/CVE-2015-8212/): Command injection in n/a (critical 9.8)
- [CVE-2008-3584](https://insights.sbomify.com/CVE-2008-3584/): Denial of service in n/a (critical 9.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-1999-0396 and fix it if it is affected.

What it is: CVE-1999-0396 is a low-severity vulnerability in Netbsd Netbsd, published on 29 Sep 1999. 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-1999-0396 in the wild and no public exploit code.

Affected product: Netbsd Netbsd. 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-1999-0396/ (Markdown: https://insights.sbomify.com/CVE-1999-0396/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-1999-0396
- NVD: https://nvd.nist.gov/vuln/detail/CVE-1999-0396
- OSV: https://osv.dev/vulnerability/CVE-1999-0396

---
From sbomify Insights: https://insights.sbomify.com/CVE-1999-0396/
Summaries are generated and may contain mistakes; the official description above is the record.