# CVE-2024-5293: D-Link DIR-2640 HTTP Referer Stack-Based Buffer Overflow Remote Code Execution Vulnerability

> Network-adjacent attackers can execute arbitrary code as root on D-Link DIR-2640 routers via a stack-based buffer overflow in the web server.

- **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:** 23 May 2024
- **Updated:** 1 Aug 2024

## What is CVE-2024-5293?

CVE-2024-5293 is a high-severity memory corruption vulnerability in D-Link DIR-2640, published on 23 May 2024. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

D-Link DIR-2640 HTTP Referer Stack-Based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DIR-2640-US routers. Authentication is not required to exploit this vulnerability.

The specific flaw exists within prog.cgi, which handles HNAP requests made to the lighttpd webserver listening on TCP ports 80 and 443. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-21853.

Weakness: CWE-121 (Stack-based Buffer Overflow)

## Which versions are affected by CVE-2024-5293?

It affects 1 product.


Products: Dlink Dir-2640 Firmware.

## How do I fix CVE-2024-5293?

No fix has been published for CVE-2024-5293 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-5293 being exploited?

There is no known exploitation of CVE-2024-5293 in the wild and no public exploit code.

## Other vulnerabilities in D-Link DIR-2640

- [CVE-2023-32149](https://insights.sbomify.com/CVE-2023-32149/): D-Link DIR-2640 prog.cgi Request Handling Stack-based Buffer Overflow Remote Code Execution Vulnerability (high 8.8)
- [CVE-2023-32147](https://insights.sbomify.com/CVE-2023-32147/): D-Link DIR-2640 LocalIPAddress Command Injection Remote Code Execution Vulnerability (medium 6.8)
- [CVE-2023-32150](https://insights.sbomify.com/CVE-2023-32150/): D-Link DIR-2640 PrefixLen Command Injection Remote Code Execution Vulnerability (medium 6.8)
- [CVE-2023-32151](https://insights.sbomify.com/CVE-2023-32151/): D-Link DIR-2640 DestNetwork Command Injection Remote Code Execution Vulnerability (medium 6.8)
- [CVE-2023-32153](https://insights.sbomify.com/CVE-2023-32153/): D-Link DIR-2640 EmailFrom Command Injection Remote Code Execution Vulnerability (medium 6.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-5293 and fix it if it is affected.

What it is: CVE-2024-5293 is a high-severity memory corruption vulnerability in D-Link DIR-2640, published on 23 May 2024. 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-2024-5293 in the wild and no public exploit code.

Affected product: D-Link DIR-2640. 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-2024-5293/ (Markdown: https://insights.sbomify.com/CVE-2024-5293/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-5293
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-5293
- OSV: https://osv.dev/vulnerability/CVE-2024-5293

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From sbomify Insights: https://insights.sbomify.com/CVE-2024-5293/
Summaries are generated and may contain mistakes; the official description above is the record.