# CVE-2016-2837: Memory corruption in n/a

> Remote attackers can execute arbitrary code via malformed video in Firefox's ClearKey CDM, bypassing the GMP sandbox.

- **Severity:** Medium 6.3 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L`)
- **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:** Yes
- **Published:** 5 Aug 2016
- **Updated:** 5 Aug 2024
- **Also known as:** DEBIAN-CVE-2016-2837, GHSA-94c3-g97c-h69h, UBUNTU-CVE-2016-2837

## What is CVE-2016-2837?

CVE-2016-2837 is a medium-severity memory corruption vulnerability in Mozilla Firefox, published on 5 Aug 2016. 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

Heap-based buffer overflow in the ClearKey Content Decryption Module (CDM) in the Encrypted Media Extensions (EME) API in Mozilla Firefox before 48.0 and Firefox ESR 45.x before 45.3 might allow remote attackers to execute arbitrary code by providing a malformed video and leveraging a Gecko Media Plugin (GMP) sandbox bypass.

Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2016-2837?

It affects 2 products.


Products: Mozilla Firefox, Oracle Linux.

## How do I fix CVE-2016-2837?

Upgrade to a fixed version.

## Is CVE-2016-2837 being exploited?

There is no known exploitation of CVE-2016-2837 in the wild and no public exploit code.

## Other vulnerabilities in Mozilla Firefox

- [CVE-2019-11708](https://insights.sbomify.com/CVE-2019-11708/): Mozilla Firefox and Thunderbird Sandbox Escape (critical 10.0, exploited in the wild)
- [CVE-2010-3765](https://insights.sbomify.com/CVE-2010-3765/): Mozilla Multiple Products Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2022-26486](https://insights.sbomify.com/CVE-2022-26486/): Mozilla Firefox Use-After-Free (critical 9.6, exploited in the wild)
- [CVE-2022-26485](https://insights.sbomify.com/CVE-2022-26485/): Mozilla Firefox Use-After-Free (high 8.8, exploited in the wild)
- [CVE-2019-11707](https://insights.sbomify.com/CVE-2019-11707/): Mozilla Firefox and Thunderbird Type Confusion (high 8.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2016-2837 and fix it if it is affected.

What it is: CVE-2016-2837 is a medium-severity memory corruption vulnerability in Mozilla Firefox, published on 5 Aug 2016. 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-2016-2837 in the wild and no public exploit code.

Affected product: Mozilla Firefox. 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-2016-2837/ (Markdown: https://insights.sbomify.com/CVE-2016-2837/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-2837
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-2837
- OSV: https://osv.dev/vulnerability/CVE-2016-2837

---
From sbomify Insights: https://insights.sbomify.com/CVE-2016-2837/
Summaries are generated and may contain mistakes; the official description above is the record.