# CVE-2022-43648: Memory corruption in DIR-3040

> Network-adjacent attackers can execute arbitrary code on D-Link DIR-3040 routers via a heap buffer overflow in the MiniDLNA service without authentication.

- **Severity:** High 8.8 (`CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **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:** 29 Mar 2023
- **Updated:** 12 Feb 2025
- **Also known as:** GHSA-p682-rxp7-r33h

## What is CVE-2022-43648?

CVE-2022-43648 is a high-severity memory corruption vulnerability in D-Link DIR-3040, published on 29 Mar 2023. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DIR-3040 1.20B03 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the MiniDLNA service. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the MiniDLNA service. Was ZDI-CAN-19910.

Weakness: CWE-122 (Heap-based Buffer Overflow)

## Which versions are affected by CVE-2022-43648?

It affects 1 product.


Products: Dlink Dir-3040 Firmware.

## How do I fix CVE-2022-43648?

No fix has been published for CVE-2022-43648 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-43648 being exploited?

There is no known exploitation of CVE-2022-43648 in the wild and no public exploit code.

## Other vulnerabilities in D-Link DIR-3040

- [CVE-2021-21913](https://insights.sbomify.com/CVE-2021-21913/): Hardcoded credentials in D-Link (critical 10.0)
- [CVE-2021-21820](https://insights.sbomify.com/CVE-2021-21820/): Hardcoded credentials in D-Link (critical 10.0)
- [CVE-2022-44832](https://insights.sbomify.com/CVE-2022-44832/): Command injection in n/a (critical 9.8)
- [CVE-2021-21819](https://insights.sbomify.com/CVE-2021-21819/): Command injection in D-Link (critical 9.1)
- [CVE-2023-41229](https://insights.sbomify.com/CVE-2023-41229/): D-Link DIR-3040 HTTP Request Processing Referer Heap-Based Buffer Overflow Remote Code Execution Vulnerability (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-43648 and fix it if it is affected.

What it is: CVE-2022-43648 is a high-severity memory corruption vulnerability in D-Link DIR-3040, published on 29 Mar 2023. 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-2022-43648 in the wild and no public exploit code.

Affected product: D-Link DIR-3040. 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-2022-43648/ (Markdown: https://insights.sbomify.com/CVE-2022-43648/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-43648
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-43648
- OSV: https://osv.dev/vulnerability/CVE-2022-43648

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From sbomify Insights: https://insights.sbomify.com/CVE-2022-43648/
Summaries are generated and may contain mistakes; the official description above is the record.