# CVE-2014-2667: Race condition in n/a

> Local attackers can bypass file permissions via a race condition in Python's os module when using multithreading with exist_ok enabled.

- **Severity:** Low 3.3 (`AV:L/AC:M/Au:N/C:P/I:P/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:** 16 Nov 2014
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-gqp4-ww82-42w3, MGASA-2014-0216, PSF-2014-5

## What is CVE-2014-2667?

CVE-2014-2667 is a low-severity vulnerability in Python Python, published on 16 Nov 2014. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Race condition in the _get_masked_mode function in Lib/os.py in Python 3.2 through 3.5, when exist_ok is set to true and multiple threads are used, might allow local users to bypass intended file permissions by leveraging a separate application vulnerability before the umask has been set to the expected value.

Weakness: CWE-362 (Concurrent Execution using Shared Resource with Improper Synchronization)

## Which versions are affected by CVE-2014-2667?

It affects 1 product.


Products: Python Python.

## How do I fix CVE-2014-2667?

Apply the vendor's patch.

## Is CVE-2014-2667 being exploited?

There is no known exploitation of CVE-2014-2667 in the wild and no public exploit code.

## Other vulnerabilities in Python Python

- [CVE-2008-5031](https://insights.sbomify.com/CVE-2008-5031/): Integer overflow in n/a (critical 10.0)
- [CVE-2014-4650](https://insights.sbomify.com/CVE-2014-4650/): Path traversal in n/a (critical 9.8)
- [CVE-2016-5636](https://insights.sbomify.com/CVE-2016-5636/): Integer overflow in n/a (critical 9.8)
- [CVE-2007-4559](https://insights.sbomify.com/CVE-2007-4559/): Path traversal in n/a (critical 9.8)
- [CVE-2017-17522](https://insights.sbomify.com/CVE-2017-17522/): Command injection in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2014-2667 and fix it if it is affected.

What it is: CVE-2014-2667 is a low-severity vulnerability in Python Python, published on 16 Nov 2014. 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-2014-2667 in the wild and no public exploit code.

Affected product: Python Python. 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-2014-2667/ (Markdown: https://insights.sbomify.com/CVE-2014-2667/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2014-2667
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2014-2667
- OSV: https://osv.dev/vulnerability/CVE-2014-2667

---
From sbomify Insights: https://insights.sbomify.com/CVE-2014-2667/
Summaries are generated and may contain mistakes; the official description above is the record.