# CVE-2020-3285: Cisco Firepower Threat Defense Software SSL/TLS URL Category Bypass Vulnerability


- **Severity:** Medium 5.8 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Fix available:** No
- **Published:** 6 May 2020
- **Updated:** 15 Nov 2024
- **Also known as:** GHSA-4fxx-mff3-3wwr

## What is CVE-2020-3285?

CVE-2020-3285 is a medium-severity vulnerability in Cisco Secure Firewall Threat Defense, published on 6 May 2020. 

### Official description

A vulnerability in the Transport Layer Security version 1.3 (TLS 1.3) policy with URL category functionality for Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass a configured TLS 1.3 policy to block traffic for a specific URL. The vulnerability is due to a logic error with Snort handling of the connection with the TLS 1.3 policy and URL category configuration. An attacker could exploit this vulnerability by sending crafted TLS 1.3 connections to an affected device. A successful exploit could allow the attacker to bypass the TLS 1.3 policy and access URLs that are outside the affected device and normally would be dropped.

Weakness: CWE-693 (Protection Mechanism Failure)

## Which versions are affected by CVE-2020-3285?

It affects 1 product.


Products: Cisco Secure Firewall Threat Defense.

## How do I fix CVE-2020-3285?

No fix has been published for CVE-2020-3285 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-3285 being exploited?

There is no known exploitation of CVE-2020-3285 in the wild and no public exploit code.

## Other vulnerabilities in Cisco Secure Firewall Threat Defense

- [CVE-2024-20412](https://insights.sbomify.com/CVE-2024-20412/): Hardcoded credentials in Cisco Firepower Threat Defense Software (critical 9.3)
- [CVE-2024-20330](https://insights.sbomify.com/CVE-2024-20330/): Memory corruption in Cisco Firepower Threat Defense Software (high 8.6)
- [CVE-2024-20339](https://insights.sbomify.com/CVE-2024-20339/): Cisco Firepower Threat Defense Software for Firepower 2100 Series TLS Denial of Service Vulnerability (high 8.6)
- [CVE-2024-20351](https://insights.sbomify.com/CVE-2024-20351/): Cisco Firepower Threat Defense Software Snort Firewall Denial of Service Vulnerability (high 8.6)
- [CVE-2023-20083](https://insights.sbomify.com/CVE-2023-20083/): Denial of service in Cisco Firepower Threat Defense Software (high 8.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-3285 and fix it if it is affected.

What it is: CVE-2020-3285 is a medium-severity vulnerability in Cisco Secure Firewall Threat Defense, published on 6 May 2020. 
Exploitation: There is no known exploitation of CVE-2020-3285 in the wild and no public exploit code.

Affected product: Cisco Secure Firewall Threat Defense. 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-2020-3285/ (Markdown: https://insights.sbomify.com/CVE-2020-3285/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-3285
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-3285
- OSV: https://osv.dev/vulnerability/CVE-2020-3285

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-3285/
Summaries are generated and may contain mistakes; the official description above is the record.