# CVE-2021-38546: Information disclosure in n/a

> Remote attackers can recover audio signals from CREATIVE Pebble speakers by analyzing power indicator LED fluctuations using optical sensors.

- **Severity:** Medium 5.9 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 11 Aug 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-mh67-cqc8-64mm

## What is CVE-2021-38546?

CVE-2021-38546 is a medium-severity vulnerability in n/a, published on 11 Aug 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

CREATIVE Pebble devices through 2021-08-09 allow remote attackers to recover speech signals from an LED on the device, via a telescope and an electro-optical sensor, aka a "Glowworm" attack. The power indicator LED of the speakers is connected directly to the power line, as a result, the intensity of a device's power indicator LED is correlative to the power consumption. The sound played by the speakers affects their power consumption and as a result is also correlative to the light intensity of the LEDs. By analyzing measurements obtained from an electro-optical sensor directed at the power indicator LEDs of the speakers, we can recover the sound played by them.

## Which versions are affected by CVE-2021-38546?

It affects 4 products.


Products: Creative Pebble Firmware, Creative Pebble Plus Firmware, Creative Pebble V2 Firmware, Creative Pebble V3 Firmware.

## How do I fix CVE-2021-38546?

No fix has been published for CVE-2021-38546 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-38546 being exploited?

There is no known exploitation of CVE-2021-38546 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-38546 and fix it if it is affected.

What it is: CVE-2021-38546 is a medium-severity vulnerability in n/a, published on 11 Aug 2021. 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-2021-38546 in the wild and no public exploit code.

Affected product: n/a. 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-2021-38546/ (Markdown: https://insights.sbomify.com/CVE-2021-38546/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-38546
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-38546
- OSV: https://osv.dev/vulnerability/CVE-2021-38546

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-38546/
Summaries are generated and may contain mistakes; the official description above is the record.