# CVE-2019-3834: Code injection in struts

> Attackers can execute arbitrary code by manipulating ClassLoader properties due to a reverted security fix in JBoss Operations Network 3.

- **Severity:** Medium 5.6 (`CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 3 Oct 2019
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-r4h2-77r7-2xch

## What is CVE-2019-3834?

CVE-2019-3834 is a medium-severity code injection vulnerability in RedHat struts, published on 3 Oct 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

It was found that the fix for CVE-2014-0114 had been reverted in JBoss Operations Network 3 (JON). This flaw allows attackers to manipulate ClassLoader properties on a vulnerable server. Exploits that have been published rely on ClassLoader properties that are exposed such as those in JON 3. Additional information can be found in the Red Hat Knowledgebase article: https://access.redhat.com/site/solutions/869353. Note that while multiple products released patches for the original CVE-2014-0114 flaw, the reversion described by this CVE-2019-3834 flaw only occurred in JON 3.

Weakness: CWE-470 (Use of Externally-Controlled Input to Select Classes or Code)

## Which versions are affected by CVE-2019-3834?

It affects 1 product.


Products: Redhat Jboss Operations Network.

## How do I fix CVE-2019-3834?

No fix has been published for CVE-2019-3834 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-3834 being exploited?

There is no known exploitation of CVE-2019-3834 in the wild and no public exploit code.

## Other vulnerabilities in RedHat struts

- [CVE-2016-6330](https://insights.sbomify.com/CVE-2016-6330/): Deserialization in n/a (critical 9.8)
- [CVE-2016-3737](https://insights.sbomify.com/CVE-2016-3737/): Deserialization in n/a (critical 9.8)
- [CVE-2015-0297](https://insights.sbomify.com/CVE-2015-0297/): Missing authorization in n/a (critical 9.0)
- [CVE-2016-5422](https://insights.sbomify.com/CVE-2016-5422/): Privilege escalation in n/a (high 8.8)
- [CVE-2010-0737](https://insights.sbomify.com/CVE-2010-0737/): Missing authorization in JBoss (high 8.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-3834 and fix it if it is affected.

What it is: CVE-2019-3834 is a medium-severity code injection vulnerability in RedHat struts, published on 3 Oct 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2019-3834 in the wild and no public exploit code.

Affected product: RedHat struts. 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-2019-3834/ (Markdown: https://insights.sbomify.com/CVE-2019-3834/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-3834
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-3834
- OSV: https://osv.dev/vulnerability/CVE-2019-3834

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-3834/
Summaries are generated and may contain mistakes; the official description above is the record.