CVE-2011-5009 describes a denial-of-service vulnerability in the CmpWebServer.dll module of 3S CoDeSys 3.4 SP4 Patch 2. This flaw allows remote attackers to crash the Control service via a crafted Content-Length in an HTTP POST request or an invalid HTTP request method, leading to a NULL pointer dereference. With a CVSS score of 5.0 (AV:N/AC:L/Au:N/C:N/I:N/A:P), it is remotely exploitable with low attack complexity, resulting in a partial availability impact. While not listed in CISA's KEV catalog and lacking public community discussion or media coverage, exploit code for both attack vectors is publicly available on ExploitDB.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
3.4CPE matchmatch criteria | cpe:2.3:a:3ssoftware:codesys:3.4:sp4:*:*:*:*:*:* |
CVSS version used by this source: 2.0
AV:N/AC:L/Au:N/C:N/I:N/A:P
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.