# CVE-2021-30339: Weak cryptography in Snapdragon Connectivity, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Wearables, Snapdragon Wired Infrastructure and Networking

> Improper buffer validation in PRNG output leads to weak key generation in Qualcomm Snapdragon firmware, compromising cryptographic security.

- **Severity:** Critical 9.0 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N`)
- **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:** 14 Jun 2022
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-vpff-g924-ggj6

## What is CVE-2021-30339?

CVE-2021-30339 is a critical vulnerability in Qualcomm Ar8035 Firmware, published on 14 Jun 2022. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Reading PRNG output may lead to improper key generation due to lack of buffer validation in Snapdragon Connectivity, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Wearables, Snapdragon Wired Infrastructure and Networking

## Which versions are affected by CVE-2021-30339?

It affects 55 products.


Products: Qualcomm Ar8035 Firmware, Qualcomm Qca6391 Firmware, Qualcomm Qca8081 Firmware, Qualcomm Qca8337 Firmware, Qualcomm Qca9984 Firmware, Qualcomm Qcm2290 Firmware, Qualcomm Qcm4290 Firmware, Qualcomm Qcm6490 Firmware, Qualcomm Qcs2290 Firmware, Qualcomm Qcs405 Firmware, Qualcomm Qcs4290 Firmware, Qualcomm Qcs6490 Firmware, Qualcomm Sd460 Firmware, Qualcomm Sd480 Firmware, Qualcomm Sd662 Firmware, Qualcomm Sd680 Firmware, Qualcomm Sd690 5g Firmware, Qualcomm Sd750g Firmware, Qualcomm Sd765 Firmware, Qualcomm Sd765g Firmware and 35 more.

## How do I fix CVE-2021-30339?

No fix has been published for CVE-2021-30339 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-30339 being exploited?

There is no known exploitation of CVE-2021-30339 in the wild and no public exploit code.

## Other vulnerabilities in Qualcomm Ar8035 Firmware

- [CVE-2023-33106](https://insights.sbomify.com/CVE-2023-33106/): Qualcomm Multiple Chipsets Use of Out-of-Range Pointer Offset (high 8.4, exploited in the wild)
- [CVE-2024-45569](https://insights.sbomify.com/CVE-2024-45569/): Improper Validation of Array Index in WLAN Host Communication (critical 9.8)
- [CVE-2024-21473](https://insights.sbomify.com/CVE-2024-21473/): Improper Input Validation in WIN SON (critical 9.8)
- [CVE-2023-28582](https://insights.sbomify.com/CVE-2023-28582/): Buffer Copy Without Checking Size of Input in Data Modem (critical 9.8)
- [CVE-2023-43552](https://insights.sbomify.com/CVE-2023-43552/): Use After Free in WLAN Host Communication (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-30339 and fix it if it is affected.

What it is: CVE-2021-30339 is a critical vulnerability in Qualcomm Ar8035 Firmware, published on 14 Jun 2022. 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-2021-30339 in the wild and no public exploit code.

Affected product: Qualcomm Ar8035 Firmware. 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-2021-30339/ (Markdown: https://insights.sbomify.com/CVE-2021-30339/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-30339
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-30339
- OSV: https://osv.dev/vulnerability/CVE-2021-30339

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-30339/
Summaries are generated and may contain mistakes; the official description above is the record.