# CVE-2019-3894: Auth bypass in wildfly

> Attackers can exploit thread reuse in WildFly's Elytron subsystem to execute code with an incorrect security identity, leading to privilege escalation.

- **Severity:** Medium 5.4 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 3 May 2019
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-7hpw-qq87-9462

## What is CVE-2019-3894?

CVE-2019-3894 is a medium-severity authentication bypass vulnerability in Redhat Jboss Enterprise Application Platform, published on 3 May 2019. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

It was discovered that the ElytronManagedThread in Wildfly's Elytron subsystem in versions from 11 to 16 stores a SecurityIdentity to run the thread as. These threads do not necessarily terminate if the keep alive time has not expired. This could allow a shared thread to use the wrong security identity when executing.

Weakness: CWE-358 (Improperly Implemented Security Check for Standard)

## Which versions are affected by CVE-2019-3894?

It affects 2 products.


Products: Redhat Jboss Enterprise Application Platform, Redhat Wildfly.

## How do I fix CVE-2019-3894?

Apply the vendor's patch.

## Is CVE-2019-3894 being exploited?

There is no known exploitation of CVE-2019-3894 in the wild and no public exploit code.

## Other vulnerabilities in Redhat Jboss Enterprise Application Platform

- [CVE-2017-12149](https://insights.sbomify.com/CVE-2017-12149/): Red Hat JBoss Application Server Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2010-1428](https://insights.sbomify.com/CVE-2010-1428/): Red Hat JBoss Information Disclosure (medium 5.9, exploited in the wild)
- [CVE-2010-0738](https://insights.sbomify.com/CVE-2010-0738/): Red Hat JBoss Authentication Bypass (low 3.7, exploited in the wild)
- [CVE-2016-3690](https://insights.sbomify.com/CVE-2016-3690/): Deserialization in n/a (critical 9.8)
- [CVE-2017-7504](https://insights.sbomify.com/CVE-2017-7504/): Deserialization in JBoss (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-3894 and fix it if it is affected.

What it is: CVE-2019-3894 is a medium-severity authentication bypass vulnerability in Redhat Jboss Enterprise Application Platform, published on 3 May 2019. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2019-3894 in the wild and no public exploit code.

Affected product: Redhat Jboss Enterprise Application Platform. 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-2019-3894/ (Markdown: https://insights.sbomify.com/CVE-2019-3894/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-3894
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-3894
- OSV: https://osv.dev/vulnerability/CVE-2019-3894

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-3894/
Summaries are generated and may contain mistakes; the official description above is the record.