# CVE-2018-19016: Denial of service in Rockwell Automation EtherNet/IP Web Server Modules 1756-EWEB (includes 1756-EWEBK) Version 5.001 and earlier, and CompactLogix 1768-EWEB Version 2.005 and earlier.

> A remote attacker can cause a denial-of-service condition in Rockwell Automation EtherNet/IP Web Server Modules by sending a crafted UDP packet to the SNMP service.

- **Severity:** High 7.5 (`CVSS:3.0/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:** 27 Mar 2019
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-c7x4-832f-v26q

## What is CVE-2018-19016?

CVE-2018-19016 is a high-severity denial of service vulnerability in Rockwell Automation EtherNet/IP Web Server Modules 1756-EWEB (includes 1756-EWEBK) Version 5.001 and earlier, and CompactLogix 1768-EWEB Version 2.005 and earlier., published on 27 Mar 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Rockwell Automation EtherNet/IP Web Server Modules 1756-EWEB (includes 1756-EWEBK) Version 5.001 and earlier, and CompactLogix 1768-EWEB Version 2.005 and earlier. A remote attacker could send a crafted UDP packet to the SNMP service causing a denial-of-service condition to occur until the affected product is restarted.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2018-19016?

It affects 2 products.


Products: Rockwellautomation Ethernet\/Ip Web Server Module 1756-Eweb, Rockwellautomation Ethernet\/Ip Web Server Module 1768-Eweb.

## How do I fix CVE-2018-19016?

No fix has been published for CVE-2018-19016 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-19016 being exploited?

There is no known exploitation of CVE-2018-19016 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-19016 and fix it if it is affected.

What it is: CVE-2018-19016 is a high-severity denial of service vulnerability in Rockwell Automation EtherNet/IP Web Server Modules 1756-EWEB (includes 1756-EWEBK) Version 5.001 and earlier, and CompactLogix 1768-EWEB Version 2.005 and earlier., published on 27 Mar 2019. 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-2018-19016 in the wild and no public exploit code.

Affected product: Rockwell Automation EtherNet/IP Web Server Modules 1756-EWEB (includes 1756-EWEBK) Version 5.001 and earlier, and CompactLogix 1768-EWEB Version 2.005 and earlier.. 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-2018-19016/ (Markdown: https://insights.sbomify.com/CVE-2018-19016/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-19016
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-19016
- OSV: https://osv.dev/vulnerability/CVE-2018-19016

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From sbomify Insights: https://insights.sbomify.com/CVE-2018-19016/
Summaries are generated and may contain mistakes; the official description above is the record.