# CVE-2024-5267: Sonos Era 100 SMB2 Message Handling Out-Of-Bounds Write Remote Code Execution Vulnerability

> Network-adjacent attackers can execute arbitrary code with root privileges on Sonos Era 100 speakers via SMB2 message handling flaws.

- **Severity:** High 8.8 (`CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/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:** Not needed
- **Fix available:** No
- **Published:** 6 Jun 2024
- **Updated:** 1 Aug 2024
- **Also known as:** GHSA-w55c-vqmf-7cp2

## What is CVE-2024-5267?

CVE-2024-5267 is a high-severity memory corruption vulnerability in Sonos Era 100, published on 6 Jun 2024. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Sonos Era 100 SMB2 Message Handling Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Sonos Era 100 smart speakers. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the handling of SMB2 messages. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-22384.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2024-5267?

It affects 1 product.


Products: Sonos Era 100 Firmware.

## How do I fix CVE-2024-5267?

No fix has been published for CVE-2024-5267 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-5267 being exploited?

There is no known exploitation of CVE-2024-5267 in the wild and no public exploit code.

## Other vulnerabilities in Sonos Era 100

- [CVE-2024-5269](https://insights.sbomify.com/CVE-2024-5269/): Sonos Era 100 SMB2 Message Handling Use-After-Free Remote Code Execution Vulnerability (high 8.8)
- [CVE-2024-5256](https://insights.sbomify.com/CVE-2024-5256/): Sonos Era 100 SMB2 Message Handling Integer Underflow Information Disclosure Vulnerability (medium 4.3)
- [CVE-2024-5268](https://insights.sbomify.com/CVE-2024-5268/): Sonos Era 100 SMB2 Message Handling Out-Of-Bounds Read Information Disclosure Vulnerability (medium 4.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-5267 and fix it if it is affected.

What it is: CVE-2024-5267 is a high-severity memory corruption vulnerability in Sonos Era 100, published on 6 Jun 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-2024-5267 in the wild and no public exploit code.

Affected product: Sonos Era 100. 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-2024-5267/ (Markdown: https://insights.sbomify.com/CVE-2024-5267/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-5267
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-5267
- OSV: https://osv.dev/vulnerability/CVE-2024-5267

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-5267/
Summaries are generated and may contain mistakes; the official description above is the record.