# CVE-2023-20882: Denial of service in Cloud Foundry Routing release

> Attackers can cause denial of service for Cloud Foundry applications by prematurely closing client connections, triggering backend removal from the routing pool.

- **Severity:** Medium 5.9 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/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:** Not needed
- **Fix available:** No
- **Published:** 26 May 2023
- **Updated:** 16 Jan 2025
- **Also known as:** GHSA-f2f8-4q6m-2pw8

## What is CVE-2023-20882?

CVE-2023-20882 is a medium-severity denial of service vulnerability in Cloud Foundry Routing release, published on 26 May 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

In Cloud foundry routing release versions from 0.262.0 and prior to 0.266.0,a bug in the gorouter process can lead to a denial of service of applications hosted on Cloud Foundry. Under the right circumstances, when client connections are closed prematurely, gorouter marks the currently selected backend as failed and removes it from the routing pool.

Weakness: CWE-400 (Uncontrolled Resource Consumption)

## Which versions are affected by CVE-2023-20882?

It affects 2 products.


Products: Cloudfoundry Cf-Deployment, Cloudfoundry Routing Release.

## How do I fix CVE-2023-20882?

No fix has been published for CVE-2023-20882 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-20882 being exploited?

There is no known exploitation of CVE-2023-20882 in the wild and no public exploit code.

## Other vulnerabilities in Cloud Foundry Routing release

- [CVE-2022-31733](https://insights.sbomify.com/CVE-2022-31733/): Auth bypass in Cloud Foundry Diego and CF Deployment (critical 9.1)
- [CVE-2020-5402](https://insights.sbomify.com/CVE-2020-5402/): UAA fails to check the state parameter when authenticating with external IDPs (high 8.8)
- [CVE-2019-11293](https://insights.sbomify.com/CVE-2019-11293/): UAA logs all query parameters with debug logging level (high 8.8)
- [CVE-2019-11290](https://insights.sbomify.com/CVE-2019-11290/): Cloud Foundry UAA logs query parameters in tomcat access file (high 8.8)
- [CVE-2019-11283](https://insights.sbomify.com/CVE-2019-11283/): Password leak in smbdriver logs (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-20882 and fix it if it is affected.

What it is: CVE-2023-20882 is a medium-severity denial of service vulnerability in Cloud Foundry Routing release, published on 26 May 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-20882 in the wild and no public exploit code.

Affected product: Cloud Foundry Routing release. 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-2023-20882/ (Markdown: https://insights.sbomify.com/CVE-2023-20882/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-20882
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-20882
- OSV: https://osv.dev/vulnerability/CVE-2023-20882

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-20882/
Summaries are generated and may contain mistakes; the official description above is the record.