# CVE-2019-5040: Integer overflow in Nest Labs

> An attacker can send a crafted packet to trigger an integer overflow, leading to information disclosure via data reuse in Nest devices.

- **Severity:** High 8.2 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 Aug 2019
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-v2rr-wfqp-88fw

## What is CVE-2019-5040?

CVE-2019-5040 is a high-severity vulnerability in Nest Labs, published on 20 Aug 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An exploitable information disclosure vulnerability exists in the Weave MessageLayer parsing of Openweave-core version 4.0.2 and Nest Cam IQ Indoor version 4620002. A specially crafted weave packet can cause an integer overflow to occur, resulting in PacketBuffer data reuse. An attacker can send a packet to trigger this vulnerability.

Weakness: CWE-190 (Integer Overflow or Wraparound)

## Which versions are affected by CVE-2019-5040?

It affects 2 products.


Products: Google Nest Cam Iq Indoor Firmware, Openweave Openweave-Core.

## How do I fix CVE-2019-5040?

No fix has been published for CVE-2019-5040 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-5040 being exploited?

There is no known exploitation of CVE-2019-5040 in the wild and no public exploit code.

## Other vulnerabilities in Nest Labs

- [CVE-2019-5035](https://insights.sbomify.com/CVE-2019-5035/): Information disclosure in Nest Labs (critical 9.0)
- [CVE-2019-5036](https://insights.sbomify.com/CVE-2019-5036/): Denial of service in Nest Labs (high 7.5)
- [CVE-2019-5037](https://insights.sbomify.com/CVE-2019-5037/): Integer overflow in Nest Labs (high 7.5)
- [CVE-2019-5043](https://insights.sbomify.com/CVE-2019-5043/): Denial of service in Nest Labs (medium 5.3)
- [CVE-2019-5034](https://insights.sbomify.com/CVE-2019-5034/): Information disclosure in Nest Labs (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-5040 and fix it if it is affected.

What it is: CVE-2019-5040 is a high-severity vulnerability in Nest Labs, published on 20 Aug 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2019-5040 in the wild and no public exploit code.

Affected product: Nest Labs. 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-2019-5040/ (Markdown: https://insights.sbomify.com/CVE-2019-5040/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-5040
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-5040
- OSV: https://osv.dev/vulnerability/CVE-2019-5040

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-5040/
Summaries are generated and may contain mistakes; the official description above is the record.