# CVE-2004-0866: Auth bypass in n/a

> Remote attackers can hijack user sessions via cookie manipulation on country-specific domains, requiring user interaction to visit a malicious site.

- **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:** A user has to click or open something
- **Fix available:** No
- **Published:** 13 Feb 2005
- **Updated:** 8 Aug 2024
- **Also known as:** CVE-2004-0868, GHSA-8j48-wxgf-pfpq

## What is CVE-2004-0866?

CVE-2004-0866 is a high-severity authentication bypass vulnerability in Microsoft Ie, published on 13 Feb 2005. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Internet Explorer 6.0 allows web sites to set cookies for country-specific top-level domains, such as .ltd.uk, .plc.uk, and .sch.uk, which could allow remote attackers to perform a session fixation attack and hijack a user's HTTP session.

## Which versions are affected by CVE-2004-0866?

It affects 5 products.


Products: Kde Konqueror, Microsoft Ie, Microsoft Internet Explorer, Mozilla Firefox, Suse Suse Linux.

## How do I fix CVE-2004-0866?

No fix has been published for CVE-2004-0866 yet. Limit exposure of the affected software until one is available.

## Is CVE-2004-0866 being exploited?

There is no known exploitation of CVE-2004-0866 in the wild and no public exploit code.

## Other vulnerabilities in Microsoft Ie

- [CVE-2007-1565](https://insights.sbomify.com/CVE-2007-1565/): Denial of service in n/a (high 7.8)
- [CVE-2004-1158](https://insights.sbomify.com/CVE-2004-1158/): Other in n/a (high 7.5)
- [CVE-2004-0867](https://insights.sbomify.com/CVE-2004-0867/): Auth bypass in n/a (high 7.5)
- [CVE-2004-0721](https://insights.sbomify.com/CVE-2004-0721/): Cross-site scripting in n/a (high 7.5)
- [CVE-2004-0411](https://insights.sbomify.com/CVE-2004-0411/): Command injection in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2004-0866 and fix it if it is affected.

What it is: CVE-2004-0866 is a high-severity authentication bypass vulnerability in Microsoft Ie, published on 13 Feb 2005. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2004-0866 in the wild and no public exploit code.

Affected product: Microsoft Ie. 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-2004-0866/ (Markdown: https://insights.sbomify.com/CVE-2004-0866/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2004-0866
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2004-0866
- OSV: https://osv.dev/vulnerability/CVE-2004-0866

---
From sbomify Insights: https://insights.sbomify.com/CVE-2004-0866/
Summaries are generated and may contain mistakes; the official description above is the record.