# CVE-2019-3933: Auth bypass in Crestron AirMedia

> Remote attackers can bypass presentation access codes on Crestron AirMedia devices to view slideshows without authentication.

- **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:** 30 Apr 2019
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-gvhj-249r-67hf

## What is CVE-2019-3933?

CVE-2019-3933 is a medium-severity authentication bypass vulnerability in Crestron AirMedia, published on 30 Apr 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Crestron AM-100 with firmware 1.6.0.2 and AM-101 with firmware 2.7.0.2 allows anyone to bypass the presentation code simply by requesting /images/browserslide.jpg via HTTP. A remote, unauthenticated attacker can use this vulnerability to watch a slideshow without knowing the access code.

Weakness: CWE-425 (Direct Request), CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2019-3933?

It affects 2 products.


Products: Crestron Am-100 Firmware, Crestron Am-101 Firmware.

## How do I fix CVE-2019-3933?

No fix has been published for CVE-2019-3933 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-3933 being exploited?

There is no known exploitation of CVE-2019-3933 in the wild and no public exploit code.

## Other vulnerabilities in Crestron AirMedia

- [CVE-2019-3925](https://insights.sbomify.com/CVE-2019-3925/): Command injection in Crestron AirMedia (critical 9.8)
- [CVE-2019-3926](https://insights.sbomify.com/CVE-2019-3926/): Command injection in Crestron AirMedia (critical 9.8)
- [CVE-2019-3927](https://insights.sbomify.com/CVE-2019-3927/): Auth bypass in Crestron AirMedia (critical 9.8)
- [CVE-2019-3932](https://insights.sbomify.com/CVE-2019-3932/): Hardcoded credentials in Crestron AirMedia (critical 9.8)
- [CVE-2019-3939](https://insights.sbomify.com/CVE-2019-3939/): Hardcoded credentials in Crestron AirMedia (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-3933 and fix it if it is affected.

What it is: CVE-2019-3933 is a medium-severity authentication bypass vulnerability in Crestron AirMedia, published on 30 Apr 2019. 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-2019-3933 in the wild and no public exploit code.

Affected product: Crestron AirMedia. 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-2019-3933/ (Markdown: https://insights.sbomify.com/CVE-2019-3933/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-3933
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-3933
- OSV: https://osv.dev/vulnerability/CVE-2019-3933

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-3933/
Summaries are generated and may contain mistakes; the official description above is the record.