# CVE-2022-33324: Denial-of-Service Vulnerability in Ethernet port of MELSEC iQ-R, iQ-L Series and MELIPC Series

> Remote unauthenticated attackers can cause a denial of service in Ethernet communication on Mitsubishi PLCs by sending crafted packets, requiring a system reset to recover.

- **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:** 23 Dec 2022
- **Updated:** 5 Sep 2024
- **Also known as:** GHSA-2j9m-jh56-7553

## What is CVE-2022-33324?

CVE-2022-33324 is a high-severity denial of service vulnerability in Mitsubishi Electric Corporation MELIPC Series MI5122-VW, published on 23 Dec 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Improper Resource Shutdown or Release vulnerability in Mitsubishi Electric Corporation MELSEC iQ-R Series R00/01/02CPU Firmware versions "32" and prior, Mitsubishi Electric Corporation MELSEC iQ-R Series R04/08/16/32/120(EN)CPU Firmware versions "65" and prior, Mitsubishi Electric Corporation MELSEC iQ-R Series R08/16/32/120SFCPU Firmware versions "29" and prior, Mitsubishi Electric Corporation MELSEC iQ-R Series R08/16/32/120PSFCPU Firmware versions "08" and prior, Mitsubishi Electric Corporation MELSEC iQ-R Series R12CCPU-V Firmware versions "17" and prior, Mitsubishi Electric Corporation MELSEC iQ-L Series L04/08/16/32HCPU Firmware versions "05" and prior and Mitsubishi Electric Corporation MELIPC Series MI5122-VW Firmware versions "07" and prior allows a remote unauthenticated attacker to cause a Denial of Service condition in Ethernet communication on the module by sending specially crafted packets. A system reset of the module is required for recovery.

Weakness: CWE-404 (Improper Resource Shutdown or Release)

## Which versions are affected by CVE-2022-33324?

It affects 19 products.


Products: Mitsubishi Melipc Mi5122-Vw Firmware, Mitsubishi Melsec Iq-L L04 Hcpu Firmware, Mitsubishi Melsec Iq-L L08 Hcpu Firmware, Mitsubishi Melsec Iq-L L16 Hcpu Firmware, Mitsubishi Melsec Iq-L L32 Hcpu Firmware, Mitsubishi Melsec Iq-R R00 Cpu Firmware, Mitsubishi Melsec Iq-R R01 Cpu Firmware, Mitsubishi Melsec Iq-R R02 Cpu Firmware, Mitsubishi Melsec Iq-R R04 Cpu Firmware, Mitsubishi Melsec Iq-R R04 Sfcpu Firmware, Mitsubishi Melsec Iq-R R08 Cpu Firmware, Mitsubishi Melsec Iq-R R08 Sfcpu Firmware, Mitsubishi Melsec Iq-R R120 Cpu Firmware, Mitsubishi Melsec Iq-R R120 Sfcpu Firmware, Mitsubishi Melsec Iq-R R12 Ccpu-v Firmware, Mitsubishi Melsec Iq-R R16 Cpu Firmware, Mitsubishi Melsec Iq-R R16 Sfcpu Firmware, Mitsubishi Melsec Iq-R R32 Cpu Firmware, Mitsubishi Melsec Iq-R R32 Sfcpu Firmware.

## How do I fix CVE-2022-33324?

No fix has been published for CVE-2022-33324 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-33324 being exploited?

There is no known exploitation of CVE-2022-33324 in the wild and no public exploit code.

## Other vulnerabilities in Mitsubishi Electric Corporation MELIPC Series MI5122-VW

- [CVE-2021-20609](https://insights.sbomify.com/CVE-2021-20609/): Denial of service in MELIPC Series MI5122-VW (high 7.5)
- [CVE-2021-20610](https://insights.sbomify.com/CVE-2021-20610/): Denial of service in MELIPC Series MI5122-VW (high 7.5)
- [CVE-2021-20611](https://insights.sbomify.com/CVE-2021-20611/): Denial of service in MELIPC Series MI5122-VW (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-33324 and fix it if it is affected.

What it is: CVE-2022-33324 is a high-severity denial of service vulnerability in Mitsubishi Electric Corporation MELIPC Series MI5122-VW, published on 23 Dec 2022. 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-2022-33324 in the wild and no public exploit code.

Affected product: Mitsubishi Electric Corporation MELIPC Series MI5122-VW. 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-2022-33324/ (Markdown: https://insights.sbomify.com/CVE-2022-33324/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-33324
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-33324
- OSV: https://osv.dev/vulnerability/CVE-2022-33324

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From sbomify Insights: https://insights.sbomify.com/CVE-2022-33324/
Summaries are generated and may contain mistakes; the official description above is the record.