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Vulnerability record · CVE-2011-5009 · published 25 December 2011

CVE-2011-5009: 3ssoftware codesys vulnerability

33ssoftware · Codesys

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.

5.0 CVSS 2.0 Medium EPSS 10% · top 4.4%
5.0CVSS 2.0 base score
10%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
14References, 2 tagged exploit
16 Jun 2026Last modified by NVD

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.

AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://aluigi.altervista.org/adv/codesys_1-adv.txt
http://seclists.org/bugtraq/2011/Nov/178
http://secunia.com/advisories/47018 Vendor Advisory
http://www.osvdb.org/77388
http://www.osvdb.org/77389
http://www.us-cert.gov/control_systems/pdf/ICS-ALERT-11-336-01A.pdf ExploitUS Government Resource
https://exchange.xforce.ibmcloud.com/vulnerabilities/71533
http://aluigi.altervista.org/adv/codesys_1-adv.txt
http://seclists.org/bugtraq/2011/Nov/178
http://secunia.com/advisories/47018 Vendor Advisory
http://www.osvdb.org/77388
http://www.osvdb.org/77389
http://www.us-cert.gov/control_systems/pdf/ICS-ALERT-11-336-01A.pdf ExploitUS Government Resource
https://exchange.xforce.ibmcloud.com/vulnerabilities/71533

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2011-50073S CoDeSys CmpWebServer stack buffer overflow via long URIThe CmpWebServer component in 3S CoDeSys 3.4 SP4 Patch 2 and earlier, as used on the ABB AC500 PLC and possibly other products, contains a stack-base…EPSS 73%analysed7.5CVE-2011-50083ssoftware codesys vulnerabilityInteger overflow in the GatewayService component in 3S CoDeSys 3.4 SP4 Patch 2 allows remote attackers to execute arbitrary code via a large size val…EPSS 5.0%6.4CVE-2011-50583ssoftware codesys permissions and access controls vulnerabilityThe CmbWebserver.dll module of the Control service in 3S CoDeSys 3.4 SP4 Patch 2 allows remote attackers to create arbitrary directories under the we…EPSS 1.8%

Source: NIST National Vulnerability Database (record CVE-2011-5009), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.