# CVE-2024-27758: RPyC's missing security check results in code execution when using numpy.array on the server-side.

Source: https://junglewise.ai/threats/cve-2024-27758-rpyc-s-missing-security-check-results-in-code-execution-when  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2024-03-12  
License: CC BY 4.0 with a link back

CVE-2024-27758 · Severity: low · CVSS 3.1 · Published 2024-03-12

In RPyC before 6.0.0, when a server exposes a method that calls the attribute named __array__ for a client-provided netref (e.g., np.array(client_netref)), a remote attacker can craft a class that results in remote code execution.

Technologies: [rpyc (PyPI)](https://junglewise.ai/threats/technologies/rpyc). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2024-27758 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2024-27758 being exploited in the wild.

**How severe is CVE-2024-27758?** Low severity, with a CVSS score of 3.1, published 12 March 2024.

**Which products and versions are affected?** rpyc (PyPI) ECOSYSTEM:introduced=0,fixed=6.0.0, ECOSYSTEM:introduced=4.0.0,fixed=6.0.0.

**Is there a fix for CVE-2024-27758?** Yes. rpyc (PyPI): upgrade to 6.0.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2024-27758?** Check whether you run rpyc (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- rpyc (PyPI): upgrade to 6.0.0 or later

  ```sh
  pip install "rpyc>=6.0.0"
  ```


## Affected products

- rpyc (PyPI) ECOSYSTEM:introduced=0,fixed=6.0.0, ECOSYSTEM:introduced=4.0.0,fixed=6.0.0

## Identifiers

- CVE-2024-27758
- GHSA-h5cg-53g7-gqjw
- PYSEC-2024-44

## Related threats

- [Dynamic modification of RPyC service due to missing security check](https://junglewise.ai/threats/cve-2019-16328-duplicate-advisory-possible-remote-code-execution-via-a-remote)
- [PYSEC-2019-48 - In RPyC 4.1.x through 4.1.1, a remote attacker can dynamically modify object attributes to construct a…](https://junglewise.ai/threats/pysec-2019-48-in-rpyc-4-1-x-through-4-1-1-a-remote-attacker-can-e4c92328)