# CVE-2023-43492: Weintek cMT3000 HMI Web CGI Stack-based Buffer Overflow

> An anonymous attacker can exploit a stack-based buffer overflow in the HMI web interface to hijack control flow and bypass authentication.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/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:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 19 Oct 2023
- **Updated:** 16 Jan 2025
- **Also known as:** GHSA-6gp7-g3rx-2cq6

## What is CVE-2023-43492?

CVE-2023-43492 is a critical memory corruption vulnerability in Weintek cMT-FHD, published on 19 Oct 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

In Weintek's cMT3000 HMI Web CGI device, the cgi-bin codesys.cgi contains a stack-based buffer overflow, which could allow an anonymous attacker to hijack control flow and bypass login authentication.

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

## Which versions are affected by CVE-2023-43492?

It affects 7 products.


Products: Weintek Cmt-Fhd Firmware, Weintek Cmt-Hdm Firmware, Weintek Cmt3071 Firmware, Weintek Cmt3072 Firmware, Weintek Cmt3090 Firmware, Weintek Cmt3103 Firmware, Weintek Cmt3151 Firmware.

## How do I fix CVE-2023-43492?

No fix has been published for CVE-2023-43492 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-43492 being exploited?

There is no known exploitation of CVE-2023-43492 in the wild and no public exploit code.

## Other vulnerabilities in Weintek cMT-FHD

- [CVE-2023-38584](https://insights.sbomify.com/CVE-2023-38584/): Weintek cMT3000 HMI Web CGI Stack-based Buffer Overflow (critical 9.8)
- [CVE-2023-40145](https://insights.sbomify.com/CVE-2023-40145/): Weintek cMT3000 HMI Web CGI OS Command Injection (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-43492 and fix it if it is affected.

What it is: CVE-2023-43492 is a critical memory corruption vulnerability in Weintek cMT-FHD, published on 19 Oct 2023. 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-2023-43492 in the wild and no public exploit code.

Affected product: Weintek cMT-FHD. 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-2023-43492/ (Markdown: https://insights.sbomify.com/CVE-2023-43492/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-43492
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-43492
- OSV: https://osv.dev/vulnerability/CVE-2023-43492

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-43492/
Summaries are generated and may contain mistakes; the official description above is the record.