# CVE-2020-12011: Memory corruption in GenBroker32

> Attackers can send crafted packets to cause denial of service or remote code execution in Mitsubishi and ICONICS SCADA systems.

- **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:** 16 Jul 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-p8wr-hxwm-p363

## What is CVE-2020-12011?

CVE-2020-12011 is a critical memory corruption vulnerability in GenBroker32, published on 16 Jul 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A specially crafted communication packet sent to the affected systems could cause a denial-of-service condition or allow remote code execution. This issue affects: Mitsubishi Electric MC Works64 version 4.02C (10.95.208.31) and earlier, all versions; MC Works32 version 3.00A (9.50.255.02); ICONICS GenBroker64, Platform Services, Workbench, FrameWorX Server version 10.96 and prior; GenBroker32 version 9.5 and prior.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2020-12011?

It affects 11 products.


Products: Iconics Bizviz, Iconics Energy Analytix, Iconics Facility Analytix, Iconics Genesis32, Iconics Genesis64, Iconics Hyper Historian, Iconics Mobilehmi, Iconics Quality Analytix, Iconics Smart Energy Analytix, Mitsubishielectric Mc Works, Mitsubishielectric Mc Works32.

## How do I fix CVE-2020-12011?

No fix has been published for CVE-2020-12011 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-12011 being exploited?

There is no known exploitation of CVE-2020-12011 in the wild and no public exploit code.

## Other vulnerabilities in GenBroker32

- [CVE-2011-5089](https://insights.sbomify.com/CVE-2011-5089/): Memory corruption in n/a (critical 10.0)
- [CVE-2020-12007](https://insights.sbomify.com/CVE-2020-12007/): Deserialization in GenBroker32 (critical 9.8)
- [CVE-2011-5088](https://insights.sbomify.com/CVE-2011-5088/): Security feature bypass in n/a (critical 9.3)
- [CVE-2011-2089](https://insights.sbomify.com/CVE-2011-2089/): Memory corruption in n/a (critical 9.3)
- [CVE-2020-12013](https://insights.sbomify.com/CVE-2020-12013/): SQL injection in GenBroker32 (critical 9.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-12011 and fix it if it is affected.

What it is: CVE-2020-12011 is a critical memory corruption vulnerability in GenBroker32, published on 16 Jul 2020. 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-2020-12011 in the wild and no public exploit code.

Affected product: GenBroker32. 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-2020-12011/ (Markdown: https://insights.sbomify.com/CVE-2020-12011/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-12011
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-12011
- OSV: https://osv.dev/vulnerability/CVE-2020-12011

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-12011/
Summaries are generated and may contain mistakes; the official description above is the record.