# CVE-2019-4439: Auth bypass in Cloud Private

> Failure to invalidate sessions on logout allows local users to impersonate others, requiring an upgrade to IBM Cloud Private.

- **Severity:** Medium 5.9 (`CVSS:3.0/I:L/AV:L/C:L/A:L/AC:L/S:U/PR:N/UI:N/E:U/RC:C/RL:O`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 25 Jul 2019
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-m7j6-fv82-q34r

## What is CVE-2019-4439?

CVE-2019-4439 is a medium-severity authentication bypass vulnerability in IBM Cloud Private, published on 25 Jul 2019. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

IBM Cloud Private 3.1.0, 3.1.1, and 3.1.2 does not invalidate session after logout which could allow a local user to impersonate another user on the system. IBM X-Force ID: 162949.

Weakness: CWE-384 (Session Fixation)

## Which versions are affected by CVE-2019-4439?

It affects 1 product.


Products: Ibm Cloud Private.

## How do I fix CVE-2019-4439?

No fix has been published for CVE-2019-4439 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-4439 being exploited?

There is no known exploitation of CVE-2019-4439 in the wild and no public exploit code.

## Other vulnerabilities in IBM Cloud Private

- [CVE-2018-1939](https://insights.sbomify.com/CVE-2018-1939/): Open redirect in Cloud Private (medium 6.8)
- [CVE-2019-4239](https://insights.sbomify.com/CVE-2019-4239/): Information disclosure in MQ Advanced Cloud Pak (IBM Cloud Private on RedHat OpenShift) (medium 6.2)
- [CVE-2018-1841](https://insights.sbomify.com/CVE-2018-1841/): Information disclosure in Cloud Private (medium 6.2)
- [CVE-2019-4116](https://insights.sbomify.com/CVE-2019-4116/): Information disclosure in Cloud Private (medium 5.5)
- [CVE-2019-4143](https://insights.sbomify.com/CVE-2019-4143/): Information disclosure in Cloud Private (medium 5.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-4439 and fix it if it is affected.

What it is: CVE-2019-4439 is a medium-severity authentication bypass vulnerability in IBM Cloud Private, published on 25 Jul 2019. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2019-4439 in the wild and no public exploit code.

Affected product: IBM Cloud Private. 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-2019-4439/ (Markdown: https://insights.sbomify.com/CVE-2019-4439/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-4439
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-4439
- OSV: https://osv.dev/vulnerability/CVE-2019-4439

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-4439/
Summaries are generated and may contain mistakes; the official description above is the record.