# CVE-1999-1455: Auth bypass in n/a

> Improper access control in Windows NT RSH service allows unauthorized users to log in from authorized hosts, leading to privilege escalation.

- **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:** 9 Mar 2002
- **Updated:** 1 Aug 2024
- **Also known as:** GHSA-63g3-6533-36p6

## What is CVE-1999-1455?

CVE-1999-1455 is a high-severity authentication bypass vulnerability in Microsoft Windows Nt, published on 9 Mar 2002. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

RSH service utility RSHSVC in Windows NT 3.5 through 4.0 does not properly restrict access as specified in the .Rhosts file when a user comes from an authorized host, which could allow unauthorized users to access the service by logging in from an authorized host.

## Which versions are affected by CVE-1999-1455?

It affects 1 product.


Products: Microsoft Windows Nt.

## How do I fix CVE-1999-1455?

No fix has been published for CVE-1999-1455 yet. Limit exposure of the affected software until one is available.

## Is CVE-1999-1455 being exploited?

There is no known exploitation of CVE-1999-1455 in the wild and no public exploit code.

## Other vulnerabilities in Microsoft Windows Nt

- [CVE-2004-0900](https://insights.sbomify.com/CVE-2004-0900/): The DHCP Server service for Microsoft Windows NT 4.0 Server and Terminal Server Edition does not properly validate the length of certain mes (critical 10.0)
- [CVE-2001-0045](https://insights.sbomify.com/CVE-2001-0045/): The default permissions for the RAS Administration key in Windows NT 4.0 allows local users to execute arbitrary commands by changing the va (critical 10.0)
- [CVE-1999-0119](https://insights.sbomify.com/CVE-1999-0119/): Windows NT 4.0 beta allows users to read and delete shares. (critical 10.0)
- [CVE-1999-0226](https://insights.sbomify.com/CVE-1999-0226/): Denial of service in n/a (critical 10.0)
- [CVE-1999-0285](https://insights.sbomify.com/CVE-1999-0285/): Denial of service in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-1999-1455 and fix it if it is affected.

What it is: CVE-1999-1455 is a high-severity authentication bypass vulnerability in Microsoft Windows Nt, 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-1999-1455 in the wild and no public exploit code.

Affected product: Microsoft Windows Nt. 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-1999-1455/ (Markdown: https://insights.sbomify.com/CVE-1999-1455/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-1999-1455
- NVD: https://nvd.nist.gov/vuln/detail/CVE-1999-1455
- OSV: https://osv.dev/vulnerability/CVE-1999-1455

---
From sbomify Insights: https://insights.sbomify.com/CVE-1999-1455/
Summaries are generated and may contain mistakes; the official description above is the record.