# CVE-2024-35385: Denial of service in n/a

> A remote attacker can cause a denial of service in the Cesanta MJS library via the mjs_mk_ffi_sig function.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/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:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 May 2024
- **Updated:** 13 Feb 2025
- **Also known as:** GHSA-47p2-vwpg-v462

## What is CVE-2024-35385?

CVE-2024-35385 is a medium-severity denial of service vulnerability in Cesanta Mjs, published on 21 May 2024. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

An issue in Cesanta mjs 2.20.0 allows a remote attacker to cause a denial of service via the mjs_mk_ffi_sig function in the mjs.c file.

Weakness: CWE-125 (Out-of-bounds Read)

## Which versions are affected by CVE-2024-35385?

It affects 1 product.


Products: Cesanta Mjs.

## How do I fix CVE-2024-35385?

No fix has been published for CVE-2024-35385 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-35385 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-35385 exists.

## Other vulnerabilities in Cesanta Mjs

- [CVE-2023-50044](https://insights.sbomify.com/CVE-2023-50044/): Memory corruption in n/a (critical 9.8)
- [CVE-2023-43338](https://insights.sbomify.com/CVE-2023-43338/): Memory corruption in n/a (critical 9.8)
- [CVE-2021-46509](https://insights.sbomify.com/CVE-2021-46509/): Denial of service in n/a (high 7.8)
- [CVE-2021-46513](https://insights.sbomify.com/CVE-2021-46513/): Memory corruption in n/a (high 7.8)
- [CVE-2021-46518](https://insights.sbomify.com/CVE-2021-46518/): Memory corruption in n/a (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-35385 and fix it if it is affected.

What it is: CVE-2024-35385 is a medium-severity denial of service vulnerability in Cesanta Mjs, published on 21 May 2024. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-35385 exists.

Affected product: Cesanta Mjs. 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-2024-35385/ (Markdown: https://insights.sbomify.com/CVE-2024-35385/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-35385
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-35385
- OSV: https://osv.dev/vulnerability/CVE-2024-35385

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-35385/
Summaries are generated and may contain mistakes; the official description above is the record.