# CVE-2020-2187: Lack of SSL/TLS certificate and hostname validation in Amazon EC2 Plugin

> Attackers can intercept traffic via man-in-the-middle attacks because the plugin ignores certificate validation, exposing sensitive data.

- **Severity:** Medium 5.6 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 6 May 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-c89c-pvm7-33wj

## What is CVE-2020-2187?

CVE-2020-2187 is a medium-severity vulnerability in Jenkins Amazon EC2 Plugin, published on 6 May 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Jenkins Amazon EC2 Plugin 1.50.1 and earlier unconditionally accepts self-signed certificates and does not perform hostname validation, enabling man-in-the-middle attacks.

Weakness: CWE-295 (Improper Certificate Validation)

## Which versions are affected by CVE-2020-2187?

2 open source packages ship an affected version, including org.jenkins-ci.plugins:ec2. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `org.jenkins-ci.plugins:ec2` | Maven | All versions | 1.50.2 |
| `org.jenkins-ci.plugins:ec2` | Maven | All versions | 1.50.2 |

Products: Jenkins Amazon Ec2.

## How do I fix CVE-2020-2187?

Upgrade org.jenkins-ci.plugins:ec2 to 1.50.2 or later.

## Is CVE-2020-2187 being exploited?

There is no known exploitation of CVE-2020-2187 in the wild and no public exploit code.

## Other vulnerabilities in Jenkins Amazon EC2 Plugin

- [CVE-2020-2090](https://insights.sbomify.com/CVE-2020-2090/): CSRF vulnerability in Jenkins Amazon EC2 Plugin (high 8.8)
- [CVE-2020-2091](https://insights.sbomify.com/CVE-2020-2091/): Missing permission checks in Jenkins Amazon EC2 Plugin (high 8.1)
- [CVE-2020-2185](https://insights.sbomify.com/CVE-2020-2185/): Missing SSH host key validation in Jenkins Amazon EC2 Plugin (medium 5.6)
- [CVE-2020-2186](https://insights.sbomify.com/CVE-2020-2186/): CSRF vulnerability in Amazon EC2 Plugin (medium 4.3)
- [CVE-2020-2188](https://insights.sbomify.com/CVE-2020-2188/): Users with Overall/Read access can enumerate credentials IDs in Amazon EC2 Plugin (medium 4.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-2187 and fix it if it is affected.

What it is: CVE-2020-2187 is a medium-severity vulnerability in Jenkins Amazon EC2 Plugin, published on 6 May 2020. 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-2020-2187 in the wild and no public exploit code.

Affected packages and fixed versions:
- org.jenkins-ci.plugins:ec2 (Maven): affected all versions; fixed in 1.50.2
- org.jenkins-ci.plugins:ec2 (Maven): affected all versions; fixed in 1.50.2

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-2020-2187/ (Markdown: https://insights.sbomify.com/CVE-2020-2187/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-2187
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-2187
- OSV: https://osv.dev/vulnerability/CVE-2020-2187

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-2187/
Summaries are generated and may contain mistakes; the official description above is the record.