# CVE-2017-20198: DC/OS Marathon UI < 1.9.0 Unauthenticated RCE via Docker Mount Abuse

> Unauthenticated attackers can deploy malicious Docker containers to mount the host filesystem, achieving root code execution on DC/OS Marathon.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 23 Jul 2025
- **Updated:** 15 May 2026
- **Also known as:** GHSA-24rw-3m8c-crv2

## What is CVE-2017-20198?

CVE-2017-20198 is a critical vulnerability in D2iQ, Inc. DC/OS Marathon, published on 23 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Marathon UI in DC/OS < 1.9.0 allows unauthenticated users to deploy arbitrary Docker containers. Due to improper restriction of volume mount configurations, attackers can deploy a container that mounts the host's root filesystem (/) with read/write privileges. When using a malicious Docker image, the attacker can write to /etc/cron.d/ on the host, achieving arbitrary code execution with root privileges. This impacts any system where the Docker daemon honors Marathon container configurations without policy enforcement.

Weakness: CWE-732 (Incorrect Permission Assignment for Critical Resource)

## Which versions are affected by CVE-2017-20198?


## How do I fix CVE-2017-20198?

No fix has been published for CVE-2017-20198 yet. Limit exposure of the affected software until one is available.

## Is CVE-2017-20198 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2017-20198 exists.

Public exploit code:

- DC/OS Marathon UI Docker Exploit (metasploit)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-20198 and fix it if it is affected.

What it is: CVE-2017-20198 is a critical vulnerability in D2iQ, Inc. DC/OS Marathon, published on 23 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2017-20198 exists.

Affected product: D2iQ, Inc. DC/OS Marathon. 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-2017-20198/ (Markdown: https://insights.sbomify.com/CVE-2017-20198/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-20198
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-20198
- OSV: https://osv.dev/vulnerability/CVE-2017-20198

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From sbomify Insights: https://insights.sbomify.com/CVE-2017-20198/
Summaries are generated and may contain mistakes; the official description above is the record.