# CVE-2018-7920: Denial of service in AR1200, AR160, AR200, AR2200, AR3200

> Remote attackers can exhaust socket resources on Huawei AR routers via TCP messages, causing a denial of service.

- **Severity:** High 7.5 (`CVSS:3.0/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:** 19 Apr 2018
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-vmrh-mj92-7wj2

## What is CVE-2018-7920?

CVE-2018-7920 is a high-severity denial of service vulnerability in Huawei Ar3200 Firmware, published on 19 Apr 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Huawei AR1200 V200R006C10SPC300, AR160 V200R006C10SPC300, AR200 V200R006C10SPC300, AR2200 V200R006C10SPC300, AR3200 V200R006C10SPC300 devices have an improper resource management vulnerability. Due to the improper implementation of ACL mechanism, a remote attacker may send TCP messages to the management interface of the affected device to exploit this vulnerability. Successful exploit could exhaust the socket resource of management interface, leading to a DoS condition.

Weakness: CWE-400 (Uncontrolled Resource Consumption)

## Which versions are affected by CVE-2018-7920?

It affects 5 products.


Products: Huawei Ar1200 Firmware, Huawei Ar160 Firmware, Huawei Ar200 Firmware, Huawei Ar2200 Firmware, Huawei Ar3200 Firmware.

## How do I fix CVE-2018-7920?

No fix has been published for CVE-2018-7920 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-7920 being exploited?

There is no known exploitation of CVE-2018-7920 in the wild and no public exploit code.

## Other vulnerabilities in Huawei Ar3200 Firmware

- [CVE-2014-4705](https://insights.sbomify.com/CVE-2014-4705/): Memory corruption in n/a (high 7.5)
- [CVE-2015-7846](https://insights.sbomify.com/CVE-2015-7846/): Information disclosure in n/a (medium 4.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-7920 and fix it if it is affected.

What it is: CVE-2018-7920 is a high-severity denial of service vulnerability in Huawei Ar3200 Firmware, published on 19 Apr 2018. 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-2018-7920 in the wild and no public exploit code.

Affected product: Huawei Ar3200 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-2018-7920/ (Markdown: https://insights.sbomify.com/CVE-2018-7920/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-7920
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-7920
- OSV: https://osv.dev/vulnerability/CVE-2018-7920

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-7920/
Summaries are generated and may contain mistakes; the official description above is the record.