# CVE-2020-9085: Null dereference in HUAWEI 4G Router B612

> An attacker can cause a denial of service on Huawei 4G routers by sending specially crafted POST messages that trigger a null pointer dereference.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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:** 27 Dec 2024
- **Updated:** 27 Dec 2024
- **Also known as:** GHSA-v55h-fmcq-hv7v

## What is CVE-2020-9085?

CVE-2020-9085 is a medium-severity vulnerability in HUAWEI 4G Router B612, published on 27 Dec 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

There is a NULL pointer dereference vulnerability in some Huawei products. An attacker may send specially crafted POST messages to the affected products. Due to insufficient validation of some parameter in the message, successful exploit may cause some process abnormal. (Vulnerability ID: HWPSIRT-2017-10105)

This vulnerability has been assigned a Common Vulnerabilities and Exposures (CVE) ID: CVE-2020-9085.

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2020-9085?

It affects 1 product.


Products: Huawei B612 Firmware.

## How do I fix CVE-2020-9085?

No fix has been published for CVE-2020-9085 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-9085 being exploited?

There is no known exploitation of CVE-2020-9085 in the wild and no public exploit code.

## Other vulnerabilities in HUAWEI 4G Router B612

- [CVE-2020-9086](https://insights.sbomify.com/CVE-2020-9086/): Memory corruption in HUAWEI 4G Router B612 (medium 4.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-9085 and fix it if it is affected.

What it is: CVE-2020-9085 is a medium-severity vulnerability in HUAWEI 4G Router B612, published on 27 Dec 2024. 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-2020-9085 in the wild and no public exploit code.

Affected product: HUAWEI 4G Router B612. 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-2020-9085/ (Markdown: https://insights.sbomify.com/CVE-2020-9085/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-9085
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-9085
- OSV: https://osv.dev/vulnerability/CVE-2020-9085

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-9085/
Summaries are generated and may contain mistakes; the official description above is the record.