# CVE-2020-4319: Information disclosure in MQ Appliance

> An authenticated user can obtain sensitive information via data leaks in error messages within the pre-v7 pubsub logic of IBM MQ.

- **Severity:** Low 3.1 (`CVSS:3.0/UI:N/I:N/PR:L/S:U/C:L/AC:H/A:N/AV:N/E:U/RC:C/RL:O`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 28 Jul 2020
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-r542-g4pm-8f6m

## What is CVE-2020-4319?

CVE-2020-4319 is a low-severity vulnerability in IBM MQ Appliance, published on 28 Jul 2020. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

IBM MQ, IBM MQ Appliance, and IBM MQ for HPE NonStop 8.0, 9.1 LTS, and 9.1 CD could allow under special circumstances, an authenticated user to obtain sensitive information due to a data leak from an error message within the pre-v7 pubsub logic. IBM X-Force ID: 177402.

Weakness: CWE-209 (Generation of Error Message Containing Sensitive Information)

## Which versions are affected by CVE-2020-4319?

It affects 1 product.


Products: Ibm Mq Appliance.

## How do I fix CVE-2020-4319?

No fix has been published for CVE-2020-4319 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-4319 being exploited?

There is no known exploitation of CVE-2020-4319 in the wild and no public exploit code.

## Other vulnerabilities in IBM MQ Appliance

- [CVE-2025-0975](https://insights.sbomify.com/CVE-2025-0975/): IBM MQ code execution (high 8.8)
- [CVE-2017-1318](https://insights.sbomify.com/CVE-2017-1318/): Command injection in MQ Appliance (high 8.8)
- [CVE-2019-4620](https://insights.sbomify.com/CVE-2019-4620/): Security feature bypass in MQ Appliance (high 8.4)
- [CVE-2021-38967](https://insights.sbomify.com/CVE-2021-38967/): Code injection in MQ Appliance (high 8.2)
- [CVE-2024-25048](https://insights.sbomify.com/CVE-2024-25048/): IBM MQ code execution (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-4319 and fix it if it is affected.

What it is: CVE-2020-4319 is a low-severity vulnerability in IBM MQ Appliance, published on 28 Jul 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-4319 in the wild and no public exploit code.

Affected product: IBM MQ Appliance. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2020-4319/ (Markdown: https://insights.sbomify.com/CVE-2020-4319/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-4319
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-4319
- OSV: https://osv.dev/vulnerability/CVE-2020-4319

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-4319/
Summaries are generated and may contain mistakes; the official description above is the record.