# CVE-2000-1167: Security feature bypass in n/a

> Remote attackers can bypass network access restrictions in the FreeBSD ppp utility when nat deny_incoming is configured.

- **Severity:** High 7.5 (`AV:N/AC:L/Au:N/C:P/I:P/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:** 22 Jan 2001
- **Updated:** 8 Aug 2024
- **Also known as:** GHSA-v48g-rwc8-4jj7

## What is CVE-2000-1167?

CVE-2000-1167 is a high-severity vulnerability in Freebsd Freebsd, published on 22 Jan 2001. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

ppp utility in FreeBSD 4.1.1 and earlier does not properly restrict access as specified by the "nat deny_incoming" command, which allows remote attackers to connect to the target system.

## Which versions are affected by CVE-2000-1167?

It affects 1 product.


Products: Freebsd Freebsd.

## How do I fix CVE-2000-1167?

No fix has been published for CVE-2000-1167 yet. Limit exposure of the affected software until one is available.

## Is CVE-2000-1167 being exploited?

There is no known exploitation of CVE-2000-1167 in the wild and no public exploit code.

## Other vulnerabilities in Freebsd Freebsd

- [CVE-2018-17160](https://insights.sbomify.com/CVE-2018-17160/): Memory corruption in FreeBSD (critical 10.0)
- [CVE-2014-3954](https://insights.sbomify.com/CVE-2014-3954/): Memory corruption in n/a (critical 10.0)
- [CVE-2006-4304](https://insights.sbomify.com/CVE-2006-4304/): Memory corruption in n/a (critical 10.0)
- [CVE-2006-0226](https://insights.sbomify.com/CVE-2006-0226/): Integer overflow in n/a (critical 10.0)
- [CVE-2004-0002](https://insights.sbomify.com/CVE-2004-0002/): Denial of service in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2000-1167 and fix it if it is affected.

What it is: CVE-2000-1167 is a high-severity vulnerability in Freebsd Freebsd, published on 22 Jan 2001. 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-2000-1167 in the wild and no public exploit code.

Affected product: Freebsd Freebsd. 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-2000-1167/ (Markdown: https://insights.sbomify.com/CVE-2000-1167/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2000-1167
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2000-1167
- OSV: https://osv.dev/vulnerability/CVE-2000-1167

---
From sbomify Insights: https://insights.sbomify.com/CVE-2000-1167/
Summaries are generated and may contain mistakes; the official description above is the record.