# CVE-2020-8563: Secret leaks in logs for vSphere Provider kube-controller-manager


- **Severity:** Medium 4.7 (`CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Fix available:** Yes
- **Published:** 7 Dec 2020
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-5xfg-wv98-264m, GO-2024-2755, RHSA-2020:5260

## What is CVE-2020-8563?

CVE-2020-8563 is a medium-severity vulnerability in Kubernetes Kubernetes, published on 7 Dec 2020. 

### Official description

In Kubernetes clusters using VSphere as a cloud provider, with a logging level set to 4 or above, VSphere cloud credentials will be leaked in the cloud controller manager's log. This affects < v1.19.3.

Weakness: CWE-532 (Insertion of Sensitive Information into Log File)

## Which versions are affected by CVE-2020-8563?

3 open source packages ship an affected version, including github.com/kubernetes/kubernetes and k8s.io/kubernetes. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `github.com/kubernetes/kubernetes` | Go | All versions | 1.19.3 |
| `github.com/kubernetes/kubernetes` | Go | All versions | 1.19.3 |
| `k8s.io/kubernetes` | Go | All versions | 1.19.3 |
| `openshift` | Red Hat:openshift:4.6::el7 | All versions | 0:4.6.0-202012051246.p0.git.94231.efc9027.el7 |
| `openshift-hyperkube` | Red Hat:openshift:4.6::el7 | All versions | 0:4.6.0-202012051246.p0.git.94231.efc9027.el7 |
| `openshift` | Red Hat:openshift:4.6::el8 | All versions | 0:4.6.0-202012051246.p0.git.94231.efc9027.el8 |
| `openshift-hyperkube` | Red Hat:openshift:4.6::el8 | All versions | 0:4.6.0-202012051246.p0.git.94231.efc9027.el8 |

Products: Kubernetes Kubernetes.

## How do I fix CVE-2020-8563?

Upgrade github.com/kubernetes/kubernetes to 1.19.3 or later.

## Is CVE-2020-8563 being exploited?

There is no known exploitation of CVE-2020-8563 in the wild and no public exploit code.

## Other vulnerabilities in Kubernetes Kubernetes

- [CVE-2018-1002105](https://insights.sbomify.com/CVE-2018-1002105/): Privilege Escalation in Kubernetes (critical 9.8)
- [CVE-2017-1000056](https://insights.sbomify.com/CVE-2017-1000056/): Kubernetes Privilege Escalation (critical 9.8)
- [CVE-2016-1906](https://insights.sbomify.com/CVE-2016-1906/): Authorization bypass in Openshift (critical 9.8)
- [CVE-2023-3676](https://insights.sbomify.com/CVE-2023-3676/): Kubernetes - Windows nodes - Insufficient input sanitization leads to privilege escalation (high 8.8)
- [CVE-2023-3955](https://insights.sbomify.com/CVE-2023-3955/): Kubernetes - Windows nodes - Insufficient input sanitization leads to privilege escalation (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-8563 and fix it if it is affected.

What it is: CVE-2020-8563 is a medium-severity vulnerability in Kubernetes Kubernetes, published on 7 Dec 2020. 
Exploitation: There is no known exploitation of CVE-2020-8563 in the wild and no public exploit code.

Affected packages and fixed versions:
- github.com/kubernetes/kubernetes (Go): affected all versions; fixed in 1.19.3
- github.com/kubernetes/kubernetes (Go): affected all versions; fixed in 1.19.3
- k8s.io/kubernetes (Go): affected all versions; fixed in 1.19.3

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-2020-8563/ (Markdown: https://insights.sbomify.com/CVE-2020-8563/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-8563
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-8563
- OSV: https://osv.dev/vulnerability/CVE-2020-8563

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-8563/
Summaries are generated and may contain mistakes; the official description above is the record.