# CVE-1999-1346: Auth bypass in n/a

> Misconfigured PAM rules in Red Hat Linux allow users to bypass rlogin restrictions and access the host despite explicit disabling.

- **Severity:** High 7.5 (`AV:N/AC:L/Au:N/C:P/I:P/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 12 Sep 2001
- **Updated:** 1 Aug 2024
- **Also known as:** GHSA-5x42-xxxg-rqpp

## What is CVE-1999-1346?

CVE-1999-1346 is a high-severity authentication bypass vulnerability in Redhat Linux, published on 12 Sep 2001. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

PAM configuration file for rlogin in Red Hat Linux 6.1 and earlier includes a less restrictive rule before a more restrictive one, which allows users to access the host via rlogin even if rlogin has been explicitly disabled using the /etc/nologin file.

## Which versions are affected by CVE-1999-1346?

It affects 1 product.


Products: Redhat Linux.

## How do I fix CVE-1999-1346?

No fix has been published for CVE-1999-1346 yet. Limit exposure of the affected software until one is available.

## Is CVE-1999-1346 being exploited?

There is no known exploitation of CVE-1999-1346 in the wild and no public exploit code.

## Other vulnerabilities in Redhat Linux

- [CVE-2000-1220](https://insights.sbomify.com/CVE-2000-1220/): Privilege escalation in n/a (critical 10.0)
- [CVE-2003-0248](https://insights.sbomify.com/CVE-2003-0248/): Privilege escalation in n/a (critical 10.0)
- [CVE-1999-1542](https://insights.sbomify.com/CVE-1999-1542/): Command injection in n/a (critical 10.0)
- [CVE-1999-1299](https://insights.sbomify.com/CVE-1999-1299/): Privilege escalation in n/a (critical 10.0)
- [CVE-2000-0322](https://insights.sbomify.com/CVE-2000-0322/): Command injection in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-1999-1346 and fix it if it is affected.

What it is: CVE-1999-1346 is a high-severity authentication bypass vulnerability in Redhat Linux, published on 12 Sep 2001. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-1999-1346 in the wild and no public exploit code.

Affected product: Redhat 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-1999-1346/ (Markdown: https://insights.sbomify.com/CVE-1999-1346/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-1999-1346
- NVD: https://nvd.nist.gov/vuln/detail/CVE-1999-1346
- OSV: https://osv.dev/vulnerability/CVE-1999-1346

---
From sbomify Insights: https://insights.sbomify.com/CVE-1999-1346/
Summaries are generated and may contain mistakes; the official description above is the record.