# CVE-2024-20388: Information disclosure in Cisco Firepower Management Center

> Unauthenticated attackers can determine valid usernames on Cisco FMC devices by exploiting improper authentication in password reset responses.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 23 Oct 2024
- **Updated:** 24 Oct 2024
- **Also known as:** GHSA-jwpj-m256-82wg

## What is CVE-2024-20388?

CVE-2024-20388 is a medium-severity vulnerability in Cisco Secure Firewall Management Center, published on 23 Oct 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability in the password change feature of Cisco Firepower Management Center (FMC) software could allow an unauthenticated, remote attacker to determine valid user names on an affected device.

 This vulnerability is due to improper authentication of password update responses. An attacker could exploit this vulnerability by forcing a password reset on an affected device. A successful exploit could allow the attacker to determine valid user names in the unauthenticated response to a forced password reset.

Weakness: CWE-202 (Exposure of Sensitive Information Through Data Queries)

## Which versions are affected by CVE-2024-20388?

It affects 3 products.


Products: Cisco Firepower Management Center, Cisco Secure Firewall Management Center, Cisco Secure Firewall Threat Defense.

## How do I fix CVE-2024-20388?

No fix has been published for CVE-2024-20388 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-20388 being exploited?

There is no known exploitation of CVE-2024-20388 in the wild and no public exploit code.

## Other vulnerabilities in Cisco Secure Firewall Management Center

- [CVE-2024-20379](https://insights.sbomify.com/CVE-2024-20379/): Path traversal in Cisco Firepower Management Center (medium 6.5)
- [CVE-2024-20372](https://insights.sbomify.com/CVE-2024-20372/): Cross-site scripting in Cisco Firepower Management Center (medium 6.1)
- [CVE-2024-20387](https://insights.sbomify.com/CVE-2024-20387/): Cross-site scripting in Cisco Firepower Management Center (medium 5.4)
- [CVE-2024-20410](https://insights.sbomify.com/CVE-2024-20410/): Cross-site scripting in Cisco Firepower Management Center (medium 5.4)
- [CVE-2024-20386](https://insights.sbomify.com/CVE-2024-20386/): Cross-site scripting in Cisco Firepower Management Center (medium 4.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-20388 and fix it if it is affected.

What it is: CVE-2024-20388 is a medium-severity vulnerability in Cisco Secure Firewall Management Center, published on 23 Oct 2024. 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-2024-20388 in the wild and no public exploit code.

Affected product: Cisco Secure Firewall Management Center. 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-2024-20388/ (Markdown: https://insights.sbomify.com/CVE-2024-20388/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-20388
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-20388
- OSV: https://osv.dev/vulnerability/CVE-2024-20388

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-20388/
Summaries are generated and may contain mistakes; the official description above is the record.