# CVE-2024-42331: Use after free in browser_push_error

> A use-after-free vulnerability in Zabbix's browser error handling allows attackers to potentially execute arbitrary code or cause a denial of service.

- **Severity:** Low 3.3 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 27 Nov 2024
- **Updated:** 3 Nov 2025
- **Also known as:** DEBIAN-CVE-2024-42331, GHSA-xq5v-w2v7-hg7j, UBUNTU-CVE-2024-42331

## What is CVE-2024-42331?

CVE-2024-42331 is a low-severity use after free vulnerability in Zabbix Zabbix, published on 27 Nov 2024. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

In the src/libs/zbxembed/browser.c file, the es_browser_ctor method retrieves a heap pointer from the Duktape JavaScript engine. This heap pointer is subsequently utilized by the browser_push_error method in the src/libs/zbxembed/browser_error.c file. A use-after-free bug can occur at this stage if the wd->browser heap pointer is freed by garbage collection.

Weakness: CWE-416 (Use After Free)

## Which versions are affected by CVE-2024-42331?

It affects 1 product.


Products: Zabbix Zabbix.

## How do I fix CVE-2024-42331?

Apply the vendor's patch.

## Is CVE-2024-42331 being exploited?

There is no known exploitation of CVE-2024-42331 in the wild and no public exploit code.

## Other vulnerabilities in Zabbix Zabbix

- [CVE-2022-23131](https://insights.sbomify.com/CVE-2022-23131/): Zabbix Frontend Authentication Bypass (critical 9.1, exploited in the wild)
- [CVE-2007-0640](https://insights.sbomify.com/CVE-2007-0640/): Memory corruption in n/a (critical 10.0)
- [CVE-2024-42327](https://insights.sbomify.com/CVE-2024-42327/): SQL injection in user.get API (critical 9.9)
- [CVE-2024-22116](https://insights.sbomify.com/CVE-2024-22116/): Remote code execution within ping script (critical 9.9)
- [CVE-2013-3738](https://insights.sbomify.com/CVE-2013-3738/): Code injection in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-42331 and fix it if it is affected.

What it is: CVE-2024-42331 is a low-severity use after free vulnerability in Zabbix Zabbix, published on 27 Nov 2024. 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-2024-42331 in the wild and no public exploit code.

Affected product: Zabbix Zabbix. 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-2024-42331/ (Markdown: https://insights.sbomify.com/CVE-2024-42331/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-42331
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-42331
- OSV: https://osv.dev/vulnerability/CVE-2024-42331

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-42331/
Summaries are generated and may contain mistakes; the official description above is the record.