# CVE-2019-6966: Denial of service in n/a

> An attacker can cause a denial of service via excessive memory allocation in the Bento4 library when processing malicious MP4 files.

- **Severity:** Medium 6.5 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H`)
- **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:** No
- **Published:** 25 Jan 2019
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-8fh9-xpxf-xfwg, UBUNTU-CVE-2019-6966

## What is CVE-2019-6966?

CVE-2019-6966 is a medium-severity denial of service vulnerability in Axiosys Bento4, published on 25 Jan 2019. 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

An issue was discovered in Bento4 1.5.1-628. The AP4_ElstAtom class in Core/Ap4ElstAtom.cpp has an attempted excessive memory allocation related to AP4_Array<AP4_ElstEntry>::EnsureCapacity in Core/Ap4Array.h, as demonstrated by mp42hls.

Weakness: CWE-770 (Allocation of Resources Without Limits or Throttling)

## Which versions are affected by CVE-2019-6966?

It affects 1 product.


Products: Axiosys Bento4.

## How do I fix CVE-2019-6966?

No fix has been published for CVE-2019-6966 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-6966 being exploited?

There is no known exploitation of CVE-2019-6966 in the wild and no public exploit code.

## Other vulnerabilities in Axiosys Bento4

- [CVE-2024-31002](https://insights.sbomify.com/CVE-2024-31002/): Memory corruption in n/a (critical 9.8)
- [CVE-2018-14531](https://insights.sbomify.com/CVE-2018-14531/): Memory corruption in n/a (critical 9.8)
- [CVE-2018-14532](https://insights.sbomify.com/CVE-2018-14532/): Memory corruption in n/a (critical 9.8)
- [CVE-2018-13846](https://insights.sbomify.com/CVE-2018-13846/): Memory corruption in n/a (critical 9.8)
- [CVE-2024-31003](https://insights.sbomify.com/CVE-2024-31003/): Memory corruption in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-6966 and fix it if it is affected.

What it is: CVE-2019-6966 is a medium-severity denial of service vulnerability in Axiosys Bento4, published on 25 Jan 2019. 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-2019-6966 in the wild and no public exploit code.

Affected product: Axiosys Bento4. 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-2019-6966/ (Markdown: https://insights.sbomify.com/CVE-2019-6966/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-6966
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-6966
- OSV: https://osv.dev/vulnerability/CVE-2019-6966

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-6966/
Summaries are generated and may contain mistakes; the official description above is the record.