# CVE-2004-1099: Auth bypass in n/a

> Remote attackers can bypass authentication in Cisco Secure ACS by exploiting improper handling of expired or untrusted certificates when EAP-TLS is enabled.

- **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:** 1 Dec 2004
- **Updated:** 8 Aug 2024
- **Also known as:** GHSA-jx47-vcqg-x34g

## What is CVE-2004-1099?

CVE-2004-1099 is a critical authentication bypass vulnerability in n/a, published on 1 Dec 2004. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Cisco Secure Access Control Server for Windows (ACS Windows) and Cisco Secure Access Control Server Solution Engine (ACS Solution Engine) 3.3.1, when the EAP-TLS protocol is enabled, does not properly handle expired or untrusted certificates, which allows remote attackers to bypass authentication and gain unauthorized access via a "cryptographically correct" certificate with valid fields such as the username.

## Which versions are affected by CVE-2004-1099?

It affects 2 products.


Products: Cisco Secure Access Control Server, Cisco Secure Acs Solution Engine.

## How do I fix CVE-2004-1099?

No fix has been published for CVE-2004-1099 yet. Limit exposure of the affected software until one is available.

## Is CVE-2004-1099 being exploited?

There is no known exploitation of CVE-2004-1099 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2006-4098](https://insights.sbomify.com/CVE-2006-4098/): Memory corruption in n/a (critical 10.0)
- [CVE-2000-1054](https://insights.sbomify.com/CVE-2000-1054/): Memory corruption in n/a (critical 10.0)
- [CVE-2000-1055](https://insights.sbomify.com/CVE-2000-1055/): Memory corruption in n/a (critical 10.0)
- [CVE-2013-3466](https://insights.sbomify.com/CVE-2013-3466/): Command injection in n/a (critical 9.3)
- [CVE-2006-4097](https://insights.sbomify.com/CVE-2006-4097/): Memory corruption in n/a (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2004-1099 and fix it if it is affected.

What it is: CVE-2004-1099 is a critical authentication bypass vulnerability in n/a, published on 1 Dec 2004. 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-2004-1099 in the wild and no public exploit code.

Affected product: n/a. 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-2004-1099/ (Markdown: https://insights.sbomify.com/CVE-2004-1099/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2004-1099
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2004-1099
- OSV: https://osv.dev/vulnerability/CVE-2004-1099

---
From sbomify Insights: https://insights.sbomify.com/CVE-2004-1099/
Summaries are generated and may contain mistakes; the official description above is the record.