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Fencer Intel
medium 5.0

CVE-2011-5009 json

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…

published 2011-12-25 14 y ago modified 2026-06-16 4 mo ago also EUVD-2011-4914

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
10.4%
EPSS 10.4% chance of exploitation in 30 days, percentile 95%
public exploits
2
Exploit-DB

Summary

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.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-12-006-01 updated cvss 5.0

3S CoDeSys Vulnerabilities

  • 3S Smart Software Solutions CoDeSys 2.3, 3.4
    affected: mitigation

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Timeline

  1. First public exploit (EDB-36378)
  2. Published

Exploit prediction

10.39% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-36378 CoDeSys 3.4 - Null Pointer Invalid HTTP Request Parsing Remote Denial of Service dos, 2011-11-30
  • EDB-36377 CoDeSys 3.4 - POST Null Pointer Content-Length Parsing Remote Denial of Service dos, 2011-11-30
  • us-cert.gov http://www.us-cert.gov/control_systems/pdf/ICS-ALERT-11-336-01A.pdf referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.