# CVE-2016-9343: Memory corruption in Rockwell Automation Logix5000 Programmable Automation Controller FRN 16.00 through 21.00

> Attackers can execute code or cause denial of service on Rockwell Logix5000 controllers via malformed CIP packets.

- **Severity:** Critical 10.0 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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:** 13 Feb 2017
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-72wj-rc4p-79mm

## What is CVE-2016-9343?

CVE-2016-9343 is a critical memory corruption vulnerability in Rockwell Automation Logix5000 Programmable Automation Controller FRN 16.00 through 21.00, published on 13 Feb 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered in Rockwell Automation Logix5000 Programmable Automation Controller FRN 16.00 through 21.00 (excluding all firmware versions prior to FRN 16.00, which are not affected). By sending malformed common industrial protocol (CIP) packet, an attacker may be able to overflow a stack-based buffer and execute code on the controller or initiate a nonrecoverable fault resulting in a denial of service.

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

## Which versions are affected by CVE-2016-9343?

It affects 16 products.


Products: Rockwellautomation 1768 Compact Guardlogix L4xs Controller Firmware, Rockwellautomation 1768 Compactlogix L4x Controller Firmware, Rockwellautomation 1769 Compactlogix 5370 L1 Controller Firmware, Rockwellautomation 1769 Compactlogix 5370 L2 Controller Firmware, Rockwellautomation 1769 Compactlogix 5370 L3 Controller Firmware, Rockwellautomation 1769 Compactlogix L23x Controller Firmware, Rockwellautomation 1769 Compactlogix L3x Controller Firmware, Rockwellautomation Controllogix 5560 Controller Firmware, Rockwellautomation Controllogix 5560 Redundant Controller Firmware, Rockwellautomation Controllogix 5570 Controller Firmware, Rockwellautomation Controllogix 5570 Redundant Controller Firmware, Rockwellautomation Controllogix L55 Controller Firmware, Rockwellautomation Flexlogix L34 Controller Firmware, Rockwellautomation Guardlogix 5570 Controller Firmware, Rockwellautomation Rslogix Emulate 5000 Firmware, Rockwellautomation Softlogix 5800 Controller Firmware.

## How do I fix CVE-2016-9343?

No fix has been published for CVE-2016-9343 yet. Limit exposure of the affected software until one is available.

## Is CVE-2016-9343 being exploited?

There is no known exploitation of CVE-2016-9343 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2016-9343 and fix it if it is affected.

What it is: CVE-2016-9343 is a critical memory corruption vulnerability in Rockwell Automation Logix5000 Programmable Automation Controller FRN 16.00 through 21.00, published on 13 Feb 2017. 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-2016-9343 in the wild and no public exploit code.

Affected product: Rockwell Automation Logix5000 Programmable Automation Controller FRN 16.00 through 21.00. 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-2016-9343/ (Markdown: https://insights.sbomify.com/CVE-2016-9343/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-9343
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-9343
- OSV: https://osv.dev/vulnerability/CVE-2016-9343

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From sbomify Insights: https://insights.sbomify.com/CVE-2016-9343/
Summaries are generated and may contain mistakes; the official description above is the record.