# CVE-2019-9501: Broadcom wl driver is vulnerable to heap buffer overflow

> Remote attackers can trigger a heap buffer overflow in the Broadcom WiFi driver via crafted packets, potentially leading to arbitrary code execution or denial of service.

- **Severity:** High 7.9 (`CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 3 Feb 2020
- **Updated:** 4 Aug 2024
- **Also known as:** A-130373736, ASB-A-130373736, GHSA-vjw8-c937-7hwp

## What is CVE-2019-9501?

CVE-2019-9501 is a high-severity memory corruption vulnerability in Synology Router Manager, published on 3 Feb 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

The Broadcom wl WiFi driver is vulnerable to a heap buffer overflow. By supplying a vendor information element with a data length larger than 32 bytes, a heap buffer overflow is triggered in wlc_wpa_sup_eapol. In the worst case scenario, by sending specially-crafted WiFi packets, a remote, unauthenticated attacker may be able to execute arbitrary code on a vulnerable system. More typically, this vulnerability will result in denial-of-service conditions.

Weakness: CWE-787 (Out-of-bounds Write), CWE-122 (Heap-based Buffer Overflow)

## Which versions are affected by CVE-2019-9501?

It affects 2 products.


Products: Broadcom Bcm4339 Firmware, Synology Router Manager.

## How do I fix CVE-2019-9501?

Apply the vendor's patch.

## Is CVE-2019-9501 being exploited?

There is no known exploitation of CVE-2019-9501 in the wild and no public exploit code.

## Other vulnerabilities in Synology Router Manager

- [CVE-2019-9502](https://insights.sbomify.com/CVE-2019-9502/): Broadcom wl driver is vulnerable to heap buffer overflow (high 7.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-9501 and fix it if it is affected.

What it is: CVE-2019-9501 is a high-severity memory corruption vulnerability in Synology Router Manager, published on 3 Feb 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2019-9501 in the wild and no public exploit code.

Affected product: Synology Router Manager. 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-2019-9501/ (Markdown: https://insights.sbomify.com/CVE-2019-9501/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-9501
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-9501
- OSV: https://osv.dev/vulnerability/CVE-2019-9501

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-9501/
Summaries are generated and may contain mistakes; the official description above is the record.