# CVE-2012-3866: Puppet allows local users to obtain sensitive configuration information

> Local users on the Puppet master server can read sensitive configuration data from last_run_report.yaml due to insecure file permissions.

- **Severity:** Low 2.1 (`AV:L/AC:L/Au:N/C:P/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 6 Aug 2012
- **Updated:** 6 Aug 2024
- **Also known as:** DEBIAN-CVE-2012-3866, GHSA-8jxj-9r5f-w3m2

## What is CVE-2012-3866?

CVE-2012-3866 is a low-severity vulnerability in Puppet Puppet Enterprise, published on 6 Aug 2012. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

lib/puppet/defaults.rb in Puppet 2.7.x before 2.7.18, and Puppet Enterprise before 2.5.2, uses 0644 permissions for last_run_report.yaml, which allows local users to obtain sensitive configuration information by leveraging access to the puppet master server to read this file.

Weakness: CWE-264

## Which versions are affected by CVE-2012-3866?

2 open source packages ship an affected version, including puppet. It affects 3 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `puppet` | RubyGems | From 2.7.0 | 2.7.18 |
| `puppet` | RubyGems | From 2.7.0 | 2.7.18 |

Products: Puppet Puppet, Puppet Puppet Enterprise, Puppetlabs Puppet.

## How do I fix CVE-2012-3866?

Upgrade puppet to 2.7.18 or later.

## Is CVE-2012-3866 being exploited?

There is no known exploitation of CVE-2012-3866 in the wild and no public exploit code.

## Other vulnerabilities in Puppet Puppet Enterprise

- [CVE-2016-2785](https://insights.sbomify.com/CVE-2016-2785/): Puppet Improper Access Control (critical 9.8)
- [CVE-2021-27021](https://insights.sbomify.com/CVE-2021-27021/): SQL injection in Puppet DB (high 8.8)
- [CVE-2018-6513](https://insights.sbomify.com/CVE-2018-6513/): Privilege escalation in Puppet Enterprise and Puppet Agent (high 8.8)
- [CVE-2018-6514](https://insights.sbomify.com/CVE-2018-6514/): Privilege escalation in Puppet Agent (high 7.8)
- [CVE-2018-6515](https://insights.sbomify.com/CVE-2018-6515/): Code injection in Puppet Agent (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2012-3866 and fix it if it is affected.

What it is: CVE-2012-3866 is a low-severity vulnerability in Puppet Puppet Enterprise, published on 6 Aug 2012. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2012-3866 in the wild and no public exploit code.

Affected packages and fixed versions:
- puppet (RubyGems): affected from 2.7.0; fixed in 2.7.18
- puppet (RubyGems): affected from 2.7.0; fixed in 2.7.18

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-2012-3866/ (Markdown: https://insights.sbomify.com/CVE-2012-3866/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2012-3866
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2012-3866
- OSV: https://osv.dev/vulnerability/CVE-2012-3866

---
From sbomify Insights: https://insights.sbomify.com/CVE-2012-3866/
Summaries are generated and may contain mistakes; the official description above is the record.