# CVE-2022-1068: Modbus Tools Modbus Slave Stack-Based Buffer Overflow

> A stack-based buffer overflow in Modbus Slave allows attackers to crash the application via a long registration string, impacting industrial control system availability.

- **Severity:** Medium 5.5 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 1 Apr 2022
- **Updated:** 16 Apr 2025
- **Also known as:** GHSA-23h3-jvqq-m7vh

## What is CVE-2022-1068?

CVE-2022-1068 is a medium-severity memory corruption vulnerability in Modbus Slave, published on 1 Apr 2022. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

Modbus Tools Modbus Slave (versions 7.4.2 and prior) is vulnerable to a stack-based buffer overflow in the registration field. This may cause the program to crash when a long character string is used.

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

## Which versions are affected by CVE-2022-1068?

It affects 1 product.


Products: Modbustools Modbus Slave.

## How do I fix CVE-2022-1068?

No fix has been published for CVE-2022-1068 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-1068 being exploited?

There is no known exploitation of CVE-2022-1068 in the wild and no public exploit code.

Public exploit code:

- Modbus Slave缓冲区溢出漏洞CVE-2022-1068分析与复现 (github_poc): https://github.com/webraybtl/CVE-2022-1068

## Other vulnerabilities in Modbus Slave

- [CVE-2018-18759](https://insights.sbomify.com/CVE-2018-18759/): Memory corruption in n/a (high 7.5)
- [CVE-2022-4856](https://insights.sbomify.com/CVE-2022-4856/): Modbus Tools Modbus Slave mbs File mbslave.exe buffer overflow (medium 6.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-1068 and fix it if it is affected.

What it is: CVE-2022-1068 is a medium-severity memory corruption vulnerability in Modbus Slave, published on 1 Apr 2022. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2022-1068 in the wild and no public exploit code.

Affected product: Modbus Slave. 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-2022-1068/ (Markdown: https://insights.sbomify.com/CVE-2022-1068/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-1068
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-1068
- OSV: https://osv.dev/vulnerability/CVE-2022-1068

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-1068/
Summaries are generated and may contain mistakes; the official description above is the record.