# CVE-2018-11020: Denial of service in n/a

> Attackers can cause a kernel crash on Amazon Kindle Fire devices by injecting crafted arguments via a specific ioctl command on the rpmsg-omx driver.

- **Severity:** Medium 4.4 (`CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 16 Oct 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-7j77-w563-22rj

## What is CVE-2018-11020?

CVE-2018-11020 is a medium-severity denial of service vulnerability in n/a, published on 16 Oct 2018. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

kernel/omap/drivers/rpmsg/rpmsg_omx.c in the kernel component in Amazon Kindle Fire HD(3rd) Fire OS 4.5.5.3 allows attackers to inject a crafted argument via the argument of an ioctl on device file /dev/rpmsg-omx1 with the command 3221772291, and cause a kernel crash.

Weakness: CWE-88 (Improper Neutralization of Argument Delimiters in a Command)

## Which versions are affected by CVE-2018-11020?

It affects 1 product.


Products: Amazon Fire Os.

## How do I fix CVE-2018-11020?

No fix has been published for CVE-2018-11020 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-11020 being exploited?

There is no known exploitation of CVE-2018-11020 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2015-7292](https://insights.sbomify.com/CVE-2015-7292/): Memory corruption in Amazon Fire OS before 2016-01-15 (critical 9.8)
- [CVE-2018-11019](https://insights.sbomify.com/CVE-2018-11019/): Denial of service in n/a (high 7.5)
- [CVE-2018-11021](https://insights.sbomify.com/CVE-2018-11021/): Denial of service in n/a (high 7.5)
- [CVE-2018-11022](https://insights.sbomify.com/CVE-2018-11022/): Denial of service in n/a (high 7.5)
- [CVE-2018-11023](https://insights.sbomify.com/CVE-2018-11023/): Denial of service in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-11020 and fix it if it is affected.

What it is: CVE-2018-11020 is a medium-severity denial of service vulnerability in n/a, published on 16 Oct 2018. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2018-11020 in the wild and no public exploit code.

Affected product: n/a. 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-2018-11020/ (Markdown: https://insights.sbomify.com/CVE-2018-11020/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-11020
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-11020
- OSV: https://osv.dev/vulnerability/CVE-2018-11020

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-11020/
Summaries are generated and may contain mistakes; the official description above is the record.