# CVE-2023-7244: Ethercat Zeek Plugin Out-of-bounds Write

> An out-of-bounds write in the Zeek Ethercat plugin allows attackers to execute arbitrary code via malicious packets.

- **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:** 1 Mar 2024
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-xp9h-4mhq-37w4

## What is CVE-2023-7244?

CVE-2023-7244 is a critical memory corruption vulnerability in CISA Industrial Control Systems Network Protocol Parsers (ICSNPP) - Ethercat Plugin for Zeek, published on 1 Mar 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Industrial Control Systems Network Protocol Parsers (ICSNPP) - Ethercat 
Zeek Plugin versions d78dda6 and prior are vulnerable to out-of-bounds 
write in their primary analyses function for Ethercat communication 
packets. This could allow an attacker to cause arbitrary code execution.

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

## Which versions are affected by CVE-2023-7244?

It affects 1 product.


Products: Cisa Icsnpp-Ethercat.

## How do I fix CVE-2023-7244?

No fix has been published for CVE-2023-7244 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-7244 being exploited?

There is no known exploitation of CVE-2023-7244 in the wild and no public exploit code.

## Other vulnerabilities in CISA Industrial Control Systems Network Protocol Parsers (ICSNPP) - Ethercat Plugin for Zeek

- [CVE-2023-7243](https://insights.sbomify.com/CVE-2023-7243/): Ethercat Zeek Plugin Out-of-bounds Write (critical 9.8)
- [CVE-2023-7242](https://insights.sbomify.com/CVE-2023-7242/): Ethercat Zeek Plugin Out-of-bounds Read (high 8.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-7244 and fix it if it is affected.

What it is: CVE-2023-7244 is a critical memory corruption vulnerability in CISA Industrial Control Systems Network Protocol Parsers (ICSNPP) - Ethercat Plugin for Zeek, published on 1 Mar 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-2023-7244 in the wild and no public exploit code.

Affected product: CISA Industrial Control Systems Network Protocol Parsers (ICSNPP) - Ethercat Plugin for Zeek. 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-2023-7244/ (Markdown: https://insights.sbomify.com/CVE-2023-7244/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-7244
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-7244
- OSV: https://osv.dev/vulnerability/CVE-2023-7244

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-7244/
Summaries are generated and may contain mistakes; the official description above is the record.