# CVE-1999-1086: Auth bypass in n/a

> Remote attackers can gain administrator privileges by spoofing MAC addresses in NCP calls when packet signature levels are low.

- **Severity:** Critical 10.0 (`AV:N/AC:L/Au:N/C:C/I:C/A:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 12 Sep 2001
- **Updated:** 1 Aug 2024
- **Also known as:** GHSA-qhf9-4cg8-h46m

## What is CVE-1999-1086?

CVE-1999-1086 is a critical authentication bypass vulnerability in Novell Netware, published on 12 Sep 2001. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Novell 5 and earlier, when running over IPX with a packet signature level less than 3, allows remote attackers to gain administrator privileges by spoofing the MAC address in IPC fragmented packets that make NetWare Core Protocol (NCP) calls.

## Which versions are affected by CVE-1999-1086?

It affects 1 product.


Products: Novell Netware.

## How do I fix CVE-1999-1086?

No fix has been published for CVE-1999-1086 yet. Limit exposure of the affected software until one is available.

## Is CVE-1999-1086 being exploited?

There is no known exploitation of CVE-1999-1086 in the wild and no public exploit code.

## Other vulnerabilities in Novell Netware

- [CVE-2010-4227](https://insights.sbomify.com/CVE-2010-4227/): Memory corruption in n/a (critical 10.0)
- [CVE-2010-2351](https://insights.sbomify.com/CVE-2010-2351/): Memory corruption in n/a (critical 10.0)
- [CVE-2003-1595](https://insights.sbomify.com/CVE-2003-1595/): Security feature bypass in n/a (critical 10.0)
- [CVE-2004-2734](https://insights.sbomify.com/CVE-2004-2734/): webadmin-apache.conf in Novell Web Manager of Novell NetWare 6.5 uses an uppercase Alias tag with an inconsistent lowercase directory tag fo (critical 10.0)
- [CVE-2008-5696](https://insights.sbomify.com/CVE-2008-5696/): Auth bypass in n/a (critical 9.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-1999-1086 and fix it if it is affected.

What it is: CVE-1999-1086 is a critical authentication bypass vulnerability in Novell Netware, published on 12 Sep 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-1999-1086 in the wild and no public exploit code.

Affected product: Novell Netware. 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-1999-1086/ (Markdown: https://insights.sbomify.com/CVE-1999-1086/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-1999-1086
- NVD: https://nvd.nist.gov/vuln/detail/CVE-1999-1086
- OSV: https://osv.dev/vulnerability/CVE-1999-1086

---
From sbomify Insights: https://insights.sbomify.com/CVE-1999-1086/
Summaries are generated and may contain mistakes; the official description above is the record.