# CVE-2023-33043: Reachable Assertion in Modem

> A reachable assertion in the modem firmware allows a transient denial of service when handling specific beam switch requests.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 5 Dec 2023
- **Updated:** 2 Aug 2024
- **Also known as:** GHSA-pqhc-9r4h-w7g3

## What is CVE-2023-33043?

CVE-2023-33043 is a high-severity denial of service vulnerability in Qualcomm Ar8035 Firmware, published on 5 Dec 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Transient DOS in Modem when a Beam switch request is made with a non-configured BWP.

Weakness: CWE-617 (Reachable Assertion)

## Which versions are affected by CVE-2023-33043?

It affects 59 products.


Products: Qualcomm Ar8035 Firmware, Qualcomm Qca6391 Firmware, Qualcomm Qca8081 Firmware, Qualcomm Qca8337 Firmware, Qualcomm Qcm4490 Firmware, Qualcomm Qcm6490 Firmware, Qualcomm Qcm8550 Firmware, Qualcomm Qcn6024 Firmware, Qualcomm Qcn9024 Firmware, Qualcomm Qcs4490 Firmware, Qualcomm Qcs6490 Firmware, Qualcomm Qcs8550 Firmware, Qualcomm Sd888 Firmware, Qualcomm Sdx57m Firmware, Qualcomm Sm4350-Ac Firmware, Qualcomm Sm4350 Firmware, Qualcomm Sm4375 Firmware, Qualcomm Sm6375 Firmware, Qualcomm Sm7315 Firmware, Qualcomm Sm7325-Ae Firmware and 39 more.

## How do I fix CVE-2023-33043?

No fix has been published for CVE-2023-33043 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-33043 being exploited?

There is no known exploitation of CVE-2023-33043 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-2023-33043 and fix it if it is affected.

What it is: CVE-2023-33043 is a high-severity denial of service vulnerability in Qualcomm Ar8035 Firmware, published on 5 Dec 2023. 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-2023-33043 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-2023-33043/ (Markdown: https://insights.sbomify.com/CVE-2023-33043/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-33043
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-33043
- OSV: https://osv.dev/vulnerability/CVE-2023-33043

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-33043/
Summaries are generated and may contain mistakes; the official description above is the record.