CVE-2024-27758
RPyC's missing security check results in code execution when using numpy.array on the server-side.
Impact
An issue in Open Source: RPyC v.4.00 thru v.5.3.1 allows a remote attacker to execute arbitrary code via a crafted script to the `__array__` attribute component. This vulnerability was introduced in [9f45f826](https://github.com/tomerfiliba-org/rpyc/commit/9f45f8269d4106905db61d82cd529cacdb178911). ### Attack Vector RPyC services that rely on the `__array__` attribute used by numpy are impacted. When the server-side exposes a method that calls the attribute named `__array__` for a a client provided netref (e.g., `np.array(client_netref)`), a remote attacker can craft a class which results in remote code execution ### Impact Assuming the system exposes a method that calls the attribute `__array__`, an attacker can execute code using the vulnerable component. ### Patches The fix is available in RPyC 6.0.0. The major version change is because some users may need to set `allow_pickle` to `True` when migrating to RPyC 6. ### Workarounds While the recommend fix is to upgrade to RPyC 6.0.0, the workaround is to [apply bba1d356 as patch.](https://github.com/tomerfiliba-org/rpyc/commit/bba1d3562e6f9f1256ec64048cc23001c0bb7516) ### Affected Component [The affected component](https://github.com/tomerfiliba-org/rpyc/blob/5.3.1/rpyc/core/netref.py#L252-L255) is the `__array__` method constructed for `NetrefClass`. ### References - [Original disclosure](https://gist.github.com/renbou/957f70d27470982994f12a1d70153d09) by [renbou (Artem Mikheev)](https://gist.github.com/renbou) - [CVE-2024-27758](https://nvd.nist.gov/vuln/detail/CVE-2024-27758)
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | rpyc | >= 4.0.0, < 6.0.0 | 6.0.0 |
Affected products
| Product | Affected versions |
|---|---|
| RPyC | before 6.0.0 |
Versions were read from the advisory text. No structured product data has been published for this record yet.
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://gist.github.com/renbou/957f70d27470982994f12a1d70153d09
- https://github.com/tomerfiliba-org/rpyc/security/advisories/GHSA-h5cg-53g7-gqjw
- https://github.com/advisories/GHSA-h5cg-53g7-gqjw
- https://github.com/tomerfiliba-org/rpyc/commit/9f45f8269d4106905db61d82cd529cacdb178911
- https://github.com/tomerfiliba-org/rpyc/commit/bba1d3562e6f9f1256ec64048cc23001c0bb7516
- https://github.com/tomerfiliba-org/rpyc/blob/5.3.1/rpyc/core/netref.py#L252-L255
- https://nvd.nist.gov/vuln/detail/CVE-2024-27758
- https://github.com/pypa/advisory-database/tree/main/vulns/rpyc/PYSEC-2024-44.yaml