# CVE-2018-20186: Denial of service in n/a

> Attackers can cause excessive memory allocation in Bento4, leading to denial of service via crafted media 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:** 17 Dec 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-m473-7rj2-2fcq, UBUNTU-CVE-2018-20186

## What is CVE-2018-20186?

CVE-2018-20186 is a medium-severity denial of service vulnerability in Axiosys Bento4, published on 17 Dec 2018. 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 1.5.1-627. AP4_Sample::ReadData in Core/Ap4Sample.cpp allows attackers to trigger an attempted excessive memory allocation, related to AP4_DataBuffer::SetDataSize and AP4_DataBuffer::ReallocateBuffer in Core/Ap4DataBuffer.cpp.

Weakness: CWE-400 (Uncontrolled Resource Consumption)

## Which versions are affected by CVE-2018-20186?

It affects 1 product.


Products: Axiosys Bento4.

## How do I fix CVE-2018-20186?

No fix has been published for CVE-2018-20186 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-20186 being exploited?

There is no known exploitation of CVE-2018-20186 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-2018-20186 and fix it if it is affected.

What it is: CVE-2018-20186 is a medium-severity denial of service vulnerability in Axiosys Bento4, published on 17 Dec 2018. 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-2018-20186 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-2018-20186/ (Markdown: https://insights.sbomify.com/CVE-2018-20186/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-20186
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-20186
- OSV: https://osv.dev/vulnerability/CVE-2018-20186

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-20186/
Summaries are generated and may contain mistakes; the official description above is the record.