# CVE-2023-51622: D-Link DIR-X3260 prog.cgi SetTriggerPPPoEValidate Stack-based Buffer Overflow Remote Code Execution Vulnerability

> Network-adjacent authenticated attackers can execute arbitrary code as root on D-Link DIR-X3260 routers via a stack-based buffer overflow in prog.cgi.

- **Severity:** Medium 6.8 (`CVSS:3.0/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 3 May 2024
- **Updated:** 2 Aug 2024
- **Also known as:** GHSA-7p55-f535-v7g3

## What is CVE-2023-51622?

CVE-2023-51622 is a medium-severity memory corruption vulnerability in D-Link DIR-X3260, published on 3 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-X3260 prog.cgi SetTriggerPPPoEValidate 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-X3260 routers. Authentication is required to exploit this vulnerability.

The specific flaw exists within the prog.cgi binary, 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 a user-supplied string before copying it to a fixed-size stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-21672.

Weakness: CWE-787 (Out-of-bounds Write), CWE-121 (Stack-based Buffer Overflow)

## Which versions are affected by CVE-2023-51622?

It affects 1 product.


Products: Dlink Dir-X3260 Firmware.

## How do I fix CVE-2023-51622?

No fix has been published for CVE-2023-51622 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-51622 being exploited?

There is no known exploitation of CVE-2023-51622 in the wild and no public exploit code.

## Other vulnerabilities in D-Link DIR-X3260

- [CVE-2023-35723](https://insights.sbomify.com/CVE-2023-35723/): D-Link DIR-X3260 prog.cgi SOAPAction Command Injection Remote Code Execution Vulnerability (high 8.8)
- [CVE-2023-44418](https://insights.sbomify.com/CVE-2023-44418/): D-Link DIR-X3260 Prog.cgi Heap-based Buffer Overflow Remote Code Execution Vulnerability (high 8.8)
- [CVE-2023-44419](https://insights.sbomify.com/CVE-2023-44419/): D-Link DIR-X3260 Prog.cgi Stack-based Buffer Overflow Remote Code Execution Vulnerability (high 8.8)
- [CVE-2023-44420](https://insights.sbomify.com/CVE-2023-44420/): D-Link DIR-X3260 prog.cgi Incorrect Implementation of Authentication Algorithm Authentication Bypass Vulnerability (high 8.8)
- [CVE-2023-44421](https://insights.sbomify.com/CVE-2023-44421/): D-Link DIR-X3260 SetTriggerPPPoEValidate Username Command Injection Remote Code Execution Vulnerability (high 8.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-51622 and fix it if it is affected.

What it is: CVE-2023-51622 is a medium-severity memory corruption vulnerability in D-Link DIR-X3260, published on 3 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-2023-51622 in the wild and no public exploit code.

Affected product: D-Link DIR-X3260. 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-2023-51622/ (Markdown: https://insights.sbomify.com/CVE-2023-51622/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-51622
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-51622
- OSV: https://osv.dev/vulnerability/CVE-2023-51622

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-51622/
Summaries are generated and may contain mistakes; the official description above is the record.