VIR Vulnerability Intelligence Relay

CVE-2011-5007

critical
Published 2011-12-25 · Modified 2026-04-29
💬 Discuss on Community ✚ Propose mitigation
CVSS v3
—
CVSS v4 NEW
—
not yet in upstream
VIR risk
10.0

Description

Stack-based buffer overflow in the CmpWebServer component in 3S CoDeSys 3.4 SP4 Patch 2 and earlier, as used on the ABB AC500 PLC and possibly other products, allows remote attackers to execute arbitrary code via a long URI to TCP port 8080.

Predictions

Exploit likelihood
20%
Patch ETA
—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

Exploits

Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.

Exploit-DB

EDB-18187 remote windows
Celil Ünüver · 2011-12-01

CoDeSys SCADA 2.3 - Remote Buffer Overflow

Source code queued for fetch — refresh in a moment.
EDB-18240 remote windows verified
Metasploit · 2011-12-13

CoDeSys SCADA 2.3 - WebServer Stack Buffer Overflow (Metasploit)

Source code queued for fetch — refresh in a moment.

Metasploit modules

exploit_windows/scada/codesys_web_server rank 300
SCADA 3S CoDeSys CmpWebServer Stack Buffer Overflow
Source fetch failed: fetch_error — view the original via the link above.

Application impact
VendorProductVersionsFixed
3ssoftwarecodesys{"endIncluding":"3.4"}

References

CWEs

CWE-119

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.