# CVE-2019-3789: Gorouter allows space developer to hijack route services hosted outside the platform

> A space developer can hijack external route service traffic by creating a shadowing private domain, redirecting data to an internal app.

- **Severity:** High 8.8 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 24 Apr 2019
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-r999-j7hp-qmgq

## What is CVE-2019-3789?

CVE-2019-3789 is a high-severity vulnerability in Cloud Foundry CF Routing, published on 24 Apr 2019. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Cloud Foundry Routing Release, all versions prior to 0.188.0, contains a vulnerability that can hijack the traffic to route services hosted outside the platform. A user with space developer permissions can create a private domain that shadows the external domain of the route service, and map that route to an app. When the gorouter receives traffic destined for the external route service, this traffic will instead be directed to the internal app using the shadow route.

Weakness: CWE-269 (Improper Privilege Management), CWE-840

## Which versions are affected by CVE-2019-3789?

It affects 1 product.


Products: Cloudfoundry Routing Release.

## How do I fix CVE-2019-3789?

No fix has been published for CVE-2019-3789 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-3789 being exploited?

There is no known exploitation of CVE-2019-3789 in the wild and no public exploit code.

## Other vulnerabilities in Cloud Foundry CF Routing

- [CVE-2020-5401](https://insights.sbomify.com/CVE-2020-5401/): Cloud Foundry GoRouter is vulnerable to cache poisoning (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-3789 and fix it if it is affected.

What it is: CVE-2019-3789 is a high-severity vulnerability in Cloud Foundry CF Routing, published on 24 Apr 2019. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2019-3789 in the wild and no public exploit code.

Affected product: Cloud Foundry CF Routing. 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-2019-3789/ (Markdown: https://insights.sbomify.com/CVE-2019-3789/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-3789
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-3789
- OSV: https://osv.dev/vulnerability/CVE-2019-3789

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-3789/
Summaries are generated and may contain mistakes; the official description above is the record.