VDE-2025-009
Vulnerability from csaf_wagogmbhcokg - Published: 2025-02-04 11:00 - Updated: 2025-05-14 12:28Summary
WAGO: Vulnerabilities in CODESYS Control V3 - OPC UA Stack
Notes
Impact: The OPC UA Stack is used by both the CODESYS OPC UA Server and Client for data exchange with OPC UA clients like SCADA or HMIs, and OPC UA servers like PLCs. A vulnerability exists where a specially crafted request can cause the system to miscalculate the buffer size, leading to a crash during buffer initialization. Attackers can exploit this flaw by sending malicious requests to crash the CODESYS runtime system. The CODESYS Control runtime system includes both the OPC UA client and server, while the CODESYS HMI includes only the OPC UA client.
Summary: Several WAGO Firmwares are vulnerable to an incorrect calculation of the buffer size in the CODESYS OPC UA STACK. This can lead to a crash of the runtime of the affected firmware versions installed on several devices.
Remediation: Update to Firmware version 22 Patch 2, Firmware version 27 or Firmware version 4 for the basic controller. For the latest custom firmware, please contact the WAGO support.
Mitigation: The incorrect calculation of the buffer size can be avoided if the maximum supported array length of the OPC UA stack of the CODESYS Control runtime system is limited to a value of 10129639 (Stack.MaxArrayLenth=10129639) or less. This can be achieved by adding the following setting in the runtime configuration under the following path: /etc/codesys3.d/codesyscotrol.cfg
An unauthenticated remote attacker can use a malicious OPC UA client to send a crafted request to affected CODESYS products which can cause a DoS due to incorrect calculation of buffer size.
7.5 (High)
Workaround
The incorrect calculation of the buffer size can be avoided if the maximum supported array length of the OPC UA stack of the CODESYS Control runtime system
is limited to a value of 10129639 (Stack.MaxArrayLenth=10129639) or less. This can be achieved by adding the following setting in the runtime configuration under the following path: /etc/codesys3.d/codesyscotrol.cfg
Vendor Fix
The incorrect calculation of the buffer size can be avoided if the maximum supported array length of the OPC UA stack of the CODESYS Control runtime system is limited to a value of 10129639 (Stack.MaxArrayLenth=10129639) or less. This can be achieved by adding the following setting in the runtime configuration under the following path: /etc/codesys3.d/codesyscotrol.cfg
References
Acknowledgments
CERT@VDE
certvde.com
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"text": "The OPC UA Stack is used by both the CODESYS OPC UA Server and Client for data exchange with OPC UA clients like SCADA or HMIs, and OPC UA servers like PLCs. A vulnerability exists where a specially crafted request can cause the system to miscalculate the buffer size, leading to a crash during buffer initialization. Attackers can exploit this flaw by sending malicious requests to crash the CODESYS runtime system. The CODESYS Control runtime system includes both the OPC UA client and server, while the CODESYS HMI includes only the OPC UA client.",
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{
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"summary": "VDE-2025-009: WAGO: Vulnerabilities in CODESYS Control V3 - OPC UA Stack - HTML",
"url": "https://certvde.com/en/advisories/VDE-2025-009"
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"category": "self",
"summary": "VDE-2025-009: WAGO: Vulnerabilities in CODESYS Control V3 - OPC UA Stack - CSAF",
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},
"product_reference": "CSAFPID-22001",
"relates_to_product_reference": "CSAFPID-11009"
},
{
"category": "installed_on",
"full_product_name": {
"name": "Firmware \u003c04.05.10(FW27) installed on TP600 0762-430x/8000-000x",
"product_id": "CSAFPID-31014"
},
"product_reference": "CSAFPID-21004",
"relates_to_product_reference": "CSAFPID-11009"
},
{
"category": "installed_on",
"full_product_name": {
"name": "Firmware 04.05.10 installed on TP600 0762-430x/8000-000x",
"product_id": "CSAFPID-32016"
},
"product_reference": "CSAFPID-22002",
"relates_to_product_reference": "CSAFPID-11009"
},
{
"category": "installed_on",
"full_product_name": {
"name": "Firmware \u003c04.06.01(70) installed on TP600 0762-430x/8000-000x",
"product_id": "CSAFPID-31015"
},
"product_reference": "CSAFPID-21005",
"relates_to_product_reference": "CSAFPID-11009"
},
{
"category": "installed_on",
"full_product_name": {
"name": "Firmware \u003c03.06.10(FW18) installed on TP600 0762-520x/8000-000x",
"product_id": "CSAFPID-32017"
},
"product_reference": "CSAFPID-22001",
"relates_to_product_reference": "CSAFPID-11010"
},
{
"category": "installed_on",
"full_product_name": {
"name": "Firmware \u003c04.05.10(FW27) installed on TP600 0762-520x/8000-000x",
"product_id": "CSAFPID-31016"
},
"product_reference": "CSAFPID-21004",
"relates_to_product_reference": "CSAFPID-11010"
},
{
"category": "installed_on",
"full_product_name": {
"name": "Firmware 04.05.10 installed on TP600 0762-520x/8000-000x",
"product_id": "CSAFPID-32018"
},
"product_reference": "CSAFPID-22002",
"relates_to_product_reference": "CSAFPID-11010"
},
{
"category": "installed_on",
"full_product_name": {
"name": "Firmware \u003c04.06.01(70) installed on TP600 0762-520x/8000-000x",
"product_id": "CSAFPID-31017"
},
"product_reference": "CSAFPID-21005",
"relates_to_product_reference": "CSAFPID-11010"
},
{
"category": "installed_on",
"full_product_name": {
"name": "Firmware \u003c03.06.10(FW18) installed on TP600 0762-530x/8000-000x",
"product_id": "CSAFPID-32019"
},
"product_reference": "CSAFPID-22001",
"relates_to_product_reference": "CSAFPID-11011"
},
{
"category": "installed_on",
"full_product_name": {
"name": "Firmware \u003c04.05.10(FW27) installed on TP600 0762-530x/8000-000x",
"product_id": "CSAFPID-31018"
},
"product_reference": "CSAFPID-21004",
"relates_to_product_reference": "CSAFPID-11011"
},
{
"category": "installed_on",
"full_product_name": {
"name": "Firmware 04.05.10 installed on TP600 0762-530x/8000-000x",
"product_id": "CSAFPID-32020"
},
"product_reference": "CSAFPID-22002",
"relates_to_product_reference": "CSAFPID-11011"
},
{
"category": "installed_on",
"full_product_name": {
"name": "Firmware \u003c04.06.01(70) installed on TP600 0762-530x/8000-000x",
"product_id": "CSAFPID-31019"
},
"product_reference": "CSAFPID-21005",
"relates_to_product_reference": "CSAFPID-11011"
},
{
"category": "installed_on",
"full_product_name": {
"name": "Firmware \u003c03.06.10(FW18) installed on TP600 0762-620x/8000-000x",
"product_id": "CSAFPID-32021"
},
"product_reference": "CSAFPID-22001",
"relates_to_product_reference": "CSAFPID-11012"
},
{
"category": "installed_on",
"full_product_name": {
"name": "Firmware \u003c04.05.10(FW27) installed on TP600 0762-620x/8000-000x",
"product_id": "CSAFPID-31020"
},
"product_reference": "CSAFPID-21004",
"relates_to_product_reference": "CSAFPID-11012"
},
{
"category": "installed_on",
"full_product_name": {
"name": "Firmware 04.05.10 installed on TP600 0762-620x/8000-000x",
"product_id": "CSAFPID-32022"
},
"product_reference": "CSAFPID-22002",
"relates_to_product_reference": "CSAFPID-11012"
},
{
"category": "installed_on",
"full_product_name": {
"name": "Firmware \u003c04.06.01(70) installed on TP600 0762-620x/8000-000x",
"product_id": "CSAFPID-31021"
},
"product_reference": "CSAFPID-21005",
"relates_to_product_reference": "CSAFPID-11012"
},
{
"category": "installed_on",
"full_product_name": {
"name": "Firmware \u003c03.06.10(FW18) installed on TP600 0762-630x/8000-000x",
"product_id": "CSAFPID-32023"
},
"product_reference": "CSAFPID-22001",
"relates_to_product_reference": "CSAFPID-11013"
},
{
"category": "installed_on",
"full_product_name": {
"name": "Firmware \u003c04.05.10(FW27) installed on TP600 0762-630x/8000-000x",
"product_id": "CSAFPID-31022"
},
"product_reference": "CSAFPID-21004",
"relates_to_product_reference": "CSAFPID-11013"
},
{
"category": "installed_on",
"full_product_name": {
"name": "Firmware 04.05.10 installed on TP600 0762-630x/8000-000x",
"product_id": "CSAFPID-32024"
},
"product_reference": "CSAFPID-22002",
"relates_to_product_reference": "CSAFPID-11013"
},
{
"category": "installed_on",
"full_product_name": {
"name": "Firmware \u003c04.06.01(70) installed on TP600 0762-630x/8000-000x",
"product_id": "CSAFPID-31023"
},
"product_reference": "CSAFPID-21005",
"relates_to_product_reference": "CSAFPID-11013"
},
{
"category": "installed_on",
"full_product_name": {
"name": "Firmware \u003c04.06.01(70) installed on TP600 0762-630x/8000-000x",
"product_id": "CSAFPID-32025"
},
"product_reference": "CSAFPID-22004",
"relates_to_product_reference": "CSAFPID-11001"
}
]
},
"vulnerabilities": [
{
"cve": "CVE-2024-5000",
"cwe": {
"id": "CWE-131",
"name": "Incorrect Calculation of Buffer Size"
},
"notes": [
{
"category": "description",
"text": "An unauthenticated remote attacker can use a malicious OPC UA client to send a crafted request to affected CODESYS products which can cause a DoS due to incorrect calculation of buffer size.",
"title": "CVE Description"
}
],
"product_status": {
"fixed": [
"CSAFPID-32001",
"CSAFPID-32002",
"CSAFPID-32003",
"CSAFPID-32004",
"CSAFPID-32005",
"CSAFPID-32006",
"CSAFPID-32007",
"CSAFPID-32008",
"CSAFPID-32009",
"CSAFPID-32010",
"CSAFPID-32011",
"CSAFPID-32012",
"CSAFPID-32013",
"CSAFPID-32014",
"CSAFPID-32015",
"CSAFPID-32016",
"CSAFPID-32017",
"CSAFPID-32018",
"CSAFPID-32019",
"CSAFPID-32020",
"CSAFPID-32021",
"CSAFPID-32022",
"CSAFPID-32023",
"CSAFPID-32024",
"CSAFPID-32025"
],
"known_affected": [
"CSAFPID-31001",
"CSAFPID-31002",
"CSAFPID-31003",
"CSAFPID-31004",
"CSAFPID-31005",
"CSAFPID-31006",
"CSAFPID-31007",
"CSAFPID-31008",
"CSAFPID-31009",
"CSAFPID-31010",
"CSAFPID-31011",
"CSAFPID-31012",
"CSAFPID-31013",
"CSAFPID-31014",
"CSAFPID-31015",
"CSAFPID-31016",
"CSAFPID-31017",
"CSAFPID-31018",
"CSAFPID-31019",
"CSAFPID-31020",
"CSAFPID-31021",
"CSAFPID-31022",
"CSAFPID-31023"
]
},
"references": [
{
"category": "external",
"summary": "CODESYS Advisory 2024-03",
"url": "https://customers.codesys.com/index.php?eID=dumpFile\u0026t=f\u0026f=18355\u0026token=e3e5a937ce72602bec39718ddc2f4ba6d983ccd1\u0026download="
},
{
"category": "self",
"summary": "VDE-2025-009: WAGO: Vulnerabilities in CODESYS Control V3 - OPC UA Stack",
"url": "https://certvde.com/en/advisories/VDE-2025-009"
}
],
"remediations": [
{
"category": "workaround",
"date": "2024-06-06T10:00:00.000Z",
"details": "The incorrect calculation of the buffer size can be avoided if the maximum supported array length of the OPC UA stack of the CODESYS Control runtime system\nis limited to a value of 10129639 (Stack.MaxArrayLenth=10129639) or less. This can be achieved by adding the following setting in the runtime configuration under the following path: /etc/codesys3.d/codesyscotrol.cfg ",
"product_ids": [
"CSAFPID-31001",
"CSAFPID-31002",
"CSAFPID-31003",
"CSAFPID-31004",
"CSAFPID-31005",
"CSAFPID-31006",
"CSAFPID-31007",
"CSAFPID-31008",
"CSAFPID-31009",
"CSAFPID-31010",
"CSAFPID-31011",
"CSAFPID-31012",
"CSAFPID-31013",
"CSAFPID-31014",
"CSAFPID-31015",
"CSAFPID-31016",
"CSAFPID-31017",
"CSAFPID-31018",
"CSAFPID-31019",
"CSAFPID-31020",
"CSAFPID-31021",
"CSAFPID-31022",
"CSAFPID-31023"
]
},
{
"category": "vendor_fix",
"details": "The incorrect calculation of the buffer size can be avoided if the maximum supported array length of the OPC UA stack of the CODESYS Control runtime system is limited to a value of 10129639 (Stack.MaxArrayLenth=10129639) or less. This can be achieved by adding the following setting in the runtime configuration under the following path: /etc/codesys3.d/codesyscotrol.cfg",
"product_ids": [
"CSAFPID-31001",
"CSAFPID-31002",
"CSAFPID-31003",
"CSAFPID-31004",
"CSAFPID-31005",
"CSAFPID-31006",
"CSAFPID-31007",
"CSAFPID-31008",
"CSAFPID-31009",
"CSAFPID-31010",
"CSAFPID-31011",
"CSAFPID-31012",
"CSAFPID-31013",
"CSAFPID-31014",
"CSAFPID-31015",
"CSAFPID-31016",
"CSAFPID-31017",
"CSAFPID-31018",
"CSAFPID-31019",
"CSAFPID-31020",
"CSAFPID-31021",
"CSAFPID-31022",
"CSAFPID-31023"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"environmentalScore": 7.5,
"environmentalSeverity": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"temporalScore": 7.5,
"temporalSeverity": "HIGH",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"products": [
"CSAFPID-31001",
"CSAFPID-31002",
"CSAFPID-31003",
"CSAFPID-31004",
"CSAFPID-31005",
"CSAFPID-31006",
"CSAFPID-31007",
"CSAFPID-31008",
"CSAFPID-31009",
"CSAFPID-31010",
"CSAFPID-31011",
"CSAFPID-31012",
"CSAFPID-31013",
"CSAFPID-31014",
"CSAFPID-31015",
"CSAFPID-31016",
"CSAFPID-31017",
"CSAFPID-31018",
"CSAFPID-31019",
"CSAFPID-31020",
"CSAFPID-31021",
"CSAFPID-31022",
"CSAFPID-31023"
]
}
],
"title": "CVE-2024-5000"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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