Home/CVE/In CmpBlkDrvTcp of CODESYS V3 in multiple versions an uncontrolled ressource consumption allows an unauthorized attacker
CVE

CVE-2022-30791

In CmpBlkDrvTcp of CODESYS V3 in multiple versions an uncontrolled ressource consumption allows an unauthorized attacker

In CmpBlkDrvTcp of CODESYS V3 in multiple versions an uncontrolled ressource consumption allows an unauthorized attacker to block new TCP connections. Existing connections are not affected.

HIGH · CVSS 7.5 EPSS 0.00389
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules1 YARA rules0
⬡

Weakness Classification

CWE-400Uncontrolled Resource Consumption
CWE-400Uncontrolled Resource Consumption
▤

Affected Products & Versions

20
codesys control for beaglebone< 4.5.0.0
codesys control for empc-a\/imx6< 4.5.0.0
codesys control for iot2000 sl< 4.6.0.0
codesys control for linux sl< 4.5.0.0
codesys control for pfc100 sl< 4.5.0.0
codesys control for pfc200 sl< 4.5.0.0
codesys control for plcnext< 4.6.0.0
codesys control for raspberry pi sl< 4.5.0.0
◈

Sigma Hunt Rules

1
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productmediumAzure Application Gateway Modified or Deleted
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · info@cert.vde.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD11 Jul 2022 · 11:15 AM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

1
cisa-csafcisa-csaf-csaf_files-OT-white-2026-icsa-26-076-01
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=17128&token=bee4d8a57f19be289d623ec90135493b5f9179e3&download=Vendor Advisory
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