CVE-2011-5009 EXPLOIT
5.0
MEDIUM · CVSS 2.0 · EPSS 10.4% (pctl 96)
Patch early
A public exploit exists.
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.
Scoring
| CVSS | 5.0 (MEDIUM, v2.0) |
|---|---|
| Vector | AV:N/AC:L/Au:N/C:N/I:N/A:P |
| EPSS | 10.4% — more likely to be exploited than 96% of all CVEs |
| On CISA KEV | no |
| Public exploit | yes |
| Published | 2011-12-25 |
| Last modified | 2026-06-16 |
Affected (1)
| Vendor | Product |
|---|---|
| 3ssoftware | codesys |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | CoDeSys 3.4 - POST Null Pointer Content-Length Parsing Remote Denial of Service | 2011-11-30 |
| exploit-db | CoDeSys 3.4 - Null Pointer Invalid HTTP Request Parsing Remote Denial of Service | 2011-11-30 |
References
- http://aluigi.altervista.org/adv/codesys_1-adv.txt
- http://seclists.org/bugtraq/2011/Nov/178
- http://secunia.com/advisories/47018
- http://www.osvdb.org/77388
- http://www.osvdb.org/77389
- http://www.us-cert.gov/control_systems/pdf/ICS-ALERT-11-336-01A.pdf
- 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
- http://www.osvdb.org/77388
- http://www.osvdb.org/77389
- http://www.us-cert.gov/control_systems/pdf/ICS-ALERT-11-336-01A.pdf
- https://exchange.xforce.ibmcloud.com/vulnerabilities/71533
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