# CVE-2020-5675: Denial of service in GT21 model of GOT2000 series, GS21 model of GOT SIMPLE series, and Tension Controller LE7-40GU-L series

> Remote attackers can cause denial of service in Mitsubishi Electric industrial devices by sending specially crafted packets, disrupting communication functions.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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:** 4 Dec 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-96mc-r65q-rp99

## What is CVE-2020-5675?

CVE-2020-5675 is a high-severity denial of service vulnerability in Mitsubishi Electric Corporation GT21 model of GOT2000 series, GS21 model of GOT SIMPLE series, and Tension Controller LE7-40GU-L series, published on 4 Dec 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Out-of-bounds read vulnerability in GT21 model of GOT2000 series (GT2107-WTBD V01.39.000 and earlier, GT2107-WTSD V01.39.000 and earlier, GT2104-RTBD V01.39.000 and earlier, GT2104-PMBD V01.39.000 and earlier, and GT2103-PMBD V01.39.000 and earlier), GS21 model of GOT series (GS2110-WTBD V01.39.000 and earlier, GS2107-WTBD V01.39.000 and earlier, GS2110-WTBD-N V01.39.000 and earlier, and GS2107-WTBD-N V01.39.000 and earlier), and Tension Controller LE7-40GU-L series (LE7-40GU-L Screen package data for CC-Link IEF Basic V1.00, LE7-40GU-L Screen package data for MODBUS/TCP V1.00, and LE7-40GU-L Screen package data for SLMP V1.00) allows a remote attacker to cause a denial-of-service (DoS) condition by sending a specially crafted packet. As a result, deterioration of communication performance or a denial-of-service (DoS) condition of the TCP communication functions of the products may occur.

Weakness: CWE-125 (Out-of-bounds Read)

## Which versions are affected by CVE-2020-5675?

It affects 10 products.


Products: Mitsubishielectric Gs2107-Wtbd-N Firmware, Mitsubishielectric Gs2107-Wtbd Firmware, Mitsubishielectric Gs2110-Wtbd-N Firmware, Mitsubishielectric Gs2110-Wtbd Firmware, Mitsubishielectric Gt2103-Pmbd Firmware, Mitsubishielectric Gt2104-Pmbd Firmware, Mitsubishielectric Gt2104-Rtbd Firmware, Mitsubishielectric Gt2107-Wtbd Firmware, Mitsubishielectric Gt2107-Wtsd Firmware, Mitsubishielectric Le7-40gu-L Firmware.

## How do I fix CVE-2020-5675?

No fix has been published for CVE-2020-5675 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-5675 being exploited?

There is no known exploitation of CVE-2020-5675 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-5675 and fix it if it is affected.

What it is: CVE-2020-5675 is a high-severity denial of service vulnerability in Mitsubishi Electric Corporation GT21 model of GOT2000 series, GS21 model of GOT SIMPLE series, and Tension Controller LE7-40GU-L series, published on 4 Dec 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-2020-5675 in the wild and no public exploit code.

Affected product: Mitsubishi Electric Corporation GT21 model of GOT2000 series, GS21 model of GOT SIMPLE series, and Tension Controller LE7-40GU-L series. 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-2020-5675/ (Markdown: https://insights.sbomify.com/CVE-2020-5675/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-5675
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-5675
- OSV: https://osv.dev/vulnerability/CVE-2020-5675

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-5675/
Summaries are generated and may contain mistakes; the official description above is the record.