# CVE-2020-10639: Memory corruption in Eaton HMiSoft VU3 (HMIVU3 runtime not impacted)

> A buffer overflow in Eaton HMiSoft VU3 allows attackers to execute arbitrary code or cause denial of service via a crafted input file.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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:** A user has to click or open something
- **Fix available:** No
- **Published:** 15 Apr 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-2x2p-r3j5-7pgp

## What is CVE-2020-10639?

CVE-2020-10639 is a high-severity memory corruption vulnerability in Eaton HMiSoft VU3 (HMIVU3 runtime not impacted), published on 15 Apr 2020. 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

Eaton HMiSoft VU3 (HMIVU3 runtime not impacted), Version 3.00.23 and prior, however, the HMIVU runtimes are not impacted by these issues. A specially crafted input file could cause a buffer overflow when loaded by the affected product.

Weakness: CWE-120 (Buffer Copy without Checking Size of Input), CWE-121 (Stack-based Buffer Overflow)

## Which versions are affected by CVE-2020-10639?

It affects 1 product.


Products: Eaton Hmisoft Vu3 Firmware.

## How do I fix CVE-2020-10639?

No fix has been published for CVE-2020-10639 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-10639 being exploited?

There is no known exploitation of CVE-2020-10639 in the wild and no public exploit code.

## Other vulnerabilities in Eaton HMiSoft VU3 (HMIVU3 runtime not impacted)

- [CVE-2020-10637](https://insights.sbomify.com/CVE-2020-10637/): Memory corruption in Eaton HMiSoft VU3 (HMIVU3 runtime not impacted) (medium 5.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-10639 and fix it if it is affected.

What it is: CVE-2020-10639 is a high-severity memory corruption vulnerability in Eaton HMiSoft VU3 (HMIVU3 runtime not impacted), published on 15 Apr 2020. 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-2020-10639 in the wild and no public exploit code.

Affected product: Eaton HMiSoft VU3 (HMIVU3 runtime not impacted). 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-2020-10639/ (Markdown: https://insights.sbomify.com/CVE-2020-10639/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-10639
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-10639
- OSV: https://osv.dev/vulnerability/CVE-2020-10639

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-10639/
Summaries are generated and may contain mistakes; the official description above is the record.