# CVE-2023-7033: Denial of service in CC-Link IE TSN - AnyWireASLINK Bridge Module NZ2AW1GNAL

> Remote attackers can cause temporary Ethernet communication denial of service in Mitsubishi industrial devices via TCP SYN Flood attacks.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 27 Feb 2024
- **Updated:** 16 Jan 2025
- **Also known as:** GHSA-28p7-rxh6-3h6x

## What is CVE-2023-7033?

CVE-2023-7033 is a medium-severity denial of service vulnerability in Mitsubishi Electric Corporation CC-Link IE TSN - AnyWireASLINK Bridge Module NZ2AW1GNAL, published on 27 Feb 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Insufficient Resource Pool vulnerability in Ethernet function of Mitsubishi Electric Corporation MELSEC iQ-R series CPU module, MELSEC iQ-L series CPU module, MELSEC iQ-R Ethernet Interface Module, MELSEC iQ-R CC-Link IE TSN Master/Local Module, CC-Link IE TSN Remote I/O Module, CC-Link IE TSN Analog-Digital Converter Module, CC-Link IE TSN Digital-Analog Converter Module, CC-Link IE TSN - CC-Link IE Field Network Bridge Module, CC-Link IE TSN - AnyWireASLINK Bridge Module, CC-Link IE TSN FPGA Module, CC-Link IE TSN Remote Station Communication LSI CP620 with GbE-PHY, MELSEC iQ-R Motion Module, MELSEC iQ-L Motion Module, MELSEC iQ-F FX5 Motion Module, MELSEC iQ-F Series CPU module, MELSEC iQ-F Series Ethernet module, MELSEC iQ-F Series Ethernet/IP module, MELSEC iQ-F Series OPC UA Module, MELSEC iQ-F Series CC-Link IE TSN master/local module, GOT2000 Series CC-Link IE TSN Communication Unit, FR-A800-E series inverters, FR-F800-E series inverters, FR-E800-E series inverters, INVERTER CC-Link IE TSN Plug-in option, INVERTER CC-Link IE TSN Safety Plug-in option, INVERTER CC-Link IE TSN communication function built-in type, MR-J5 series AC Servos MELSERVO, MR-JET series AC Servos MELSERVO, MR-MD333G series AC Servos MELSERVO, MR-JE series AC Servos MELSERVO, MELSERVO-J4 AC Servos MELSERVO and Embedded Type Servo System Controller allow a remote attacker to cause a temporary Denial of Service condition for a certain period of time in Ethernet communication of the products by performing TCP SYN Flood attack.

Weakness: CWE-410 (Insufficient Resource Pool)

## Which versions are affected by CVE-2023-7033?


## How do I fix CVE-2023-7033?

No fix has been published for CVE-2023-7033 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-7033 being exploited?

There is no known exploitation of CVE-2023-7033 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-7033 and fix it if it is affected.

What it is: CVE-2023-7033 is a medium-severity denial of service vulnerability in Mitsubishi Electric Corporation CC-Link IE TSN - AnyWireASLINK Bridge Module NZ2AW1GNAL, published on 27 Feb 2024. 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-2023-7033 in the wild and no public exploit code.

Affected product: Mitsubishi Electric Corporation CC-Link IE TSN - AnyWireASLINK Bridge Module NZ2AW1GNAL. 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-2023-7033/ (Markdown: https://insights.sbomify.com/CVE-2023-7033/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-7033
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-7033
- OSV: https://osv.dev/vulnerability/CVE-2023-7033

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From sbomify Insights: https://insights.sbomify.com/CVE-2023-7033/
Summaries are generated and may contain mistakes; the official description above is the record.