CVE-2011-5009

Published Dec 25, 2011 3ssoftware

Overview

CVE-2011-5009 is a known-severity vulnerability affecting 3ssoftware codesys. It was published on December 25, 2011.

Technical Description

The CmpWebServer.dll module in the Control service in 3S CoDeSys 3.4 SP4 Patch 2 allows remote attackers to cause a denial of service (NULL pointer dereference) via (1) a crafted Content-Length in an HTTP POST or (2) an invalid HTTP request method.

Remediation

Check the references section for vendor advisories and patches from 3ssoftware. Update codesys to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected Products

Vendor	Product	Versions	Status

References

Ref aluigi.altervista.org/adv/codesys_1-adv.txt Ref seclists.org/bugtraq/2011/Nov/178 Ref secunia.com/advisories/47018 Ref www.osvdb.org/77388 Ref www.osvdb.org/77389 Ref www.us-cert.gov/control_systems/pdf/ICS-ALERT-11-336-01A.pdf Ref exchange.xforce.ibmcloud.com/vulnerabilities/71533 Ref aluigi.altervista.org/adv/codesys_1-adv.txt Ref seclists.org/bugtraq/2011/Nov/178 Ref secunia.com/advisories/47018

Frequently Asked Questions

What is CVE-2011-5009?

CVE-2011-5009 is a known-severity vulnerability affecting 3ssoftware codesys. It was published on December 25, 2011.

How severe is CVE-2011-5009?

CVSS score information is not yet available for this vulnerability. Check back as the CVE record is updated by NVD analysts.

How do I fix or remediate CVE-2011-5009?

How can CyberStrike help with CVE-2011-5009?

CyberStrike's AI-powered security agents can automatically detect CVE-2011-5009 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.