# CVE-2024-27527: Denial of service in n/a

> An attacker can cause a denial of service in the wasm3 WebAssembly runtime library by exploiting a vulnerability in its execution logic.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 8 Nov 2024
- **Updated:** 13 Nov 2024
- **Also known as:** GHSA-ffvv-4q2x-m92p, PYSEC-2024-303

## What is CVE-2024-27527?

CVE-2024-27527 is a high-severity denial of service vulnerability in n/a, published on 8 Nov 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

wasm3 139076a is vulnerable to Denial of Service (DoS).

Weakness: CWE-404 (Improper Resource Shutdown or Release)

## Which versions are affected by CVE-2024-27527?

1 open source package ship an affected version, including pywasm3. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `pywasm3` | PyPI | All versions to 139076a | None |

Products: Wasm3 Project Wasm3.

## How do I fix CVE-2024-27527?

No fix has been published for CVE-2024-27527 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-27527 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-27527 exists.

## Other vulnerabilities in n/a

- [CVE-2024-34249](https://insights.sbomify.com/CVE-2024-34249/): pywasm3 contains a heap buffer overflow which leads to segmentation fault (critical 9.8)
- [CVE-2024-27528](https://insights.sbomify.com/CVE-2024-27528/): pywasm3 has an Invalid Memory Read, Leading to DoS and Potential Code Execution (high 8.4)
- [CVE-2024-27529](https://insights.sbomify.com/CVE-2024-27529/): wasm3 uncontrolled memory allocation vulnerability (high 8.4)
- [CVE-2024-27530](https://insights.sbomify.com/CVE-2024-27530/): pywasm3 contains a Use-After-Free in ForEachModule (high 8.4)
- [CVE-2022-28990](https://insights.sbomify.com/CVE-2022-28990/): Buffer overflow in wasm3 (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-27527 and fix it if it is affected.

What it is: CVE-2024-27527 is a high-severity denial of service vulnerability in n/a, published on 8 Nov 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-27527 exists.

Affected packages and fixed versions:
- pywasm3 (PyPI): affected all versions up to 139076a; no fix listed

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-2024-27527/ (Markdown: https://insights.sbomify.com/CVE-2024-27527/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-27527
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-27527
- OSV: https://osv.dev/vulnerability/CVE-2024-27527

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-27527/
Summaries are generated and may contain mistakes; the official description above is the record.