Vulnerability-Lookup

VDE-2021-049

Vulnerability from csaf_wagogmbhcokg - Published: 2021-11-16 12:05 - Updated: 2025-05-22 13:03

Summary

WAGO: Denial of Service Vulnerability in CODESYS Runtime 2.3

Notes

Summary: A Denial-of-Service Vulnerability was reported in CODESYS 2.3 Runtime. The CODESYS 2.3 Runtime is an essential component in several WAGO PLC's. All vulnerable PLCs are listed in chapter 'Affected Products'.

Impact: The reported vulnerabilities allow an attacker who has access to the device and is able to exploit the vulnerability, to manipulate and disrupt the CODESYS 2.3 Runtime of the device.

Mitigation: 1. Use general security best practices to protect systems from local and network attacks. 2. Do not allow direct access to the device from untrusted networks. 3. Update to the latest firmware according to the table in chapter solutions. 4. Disable the CODESYS 2.3 port 2455.

CVE-2021-34593

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-755 - Improper Handling of Exceptional Conditions

Mitigation 1. Use general security best practices to protect systems from local and network attacks. 2. Do not allow direct access to the device from untrusted networks. 3. Update to the latest firmware according to the table in chapter solutions. 4. Disable the CODESYS 2.3 port 2455.

References

URL

Category

	https://certvde.com/en/advisories/vendor/wago/	external
	https://certvde.com/de/advisories/VDE-2020-015/	self
	https://wago.csaf-tp.certvde.com/.well-known/csaf…	self

Acknowledgments

CERTVDE certvde.com

SEC Consult Vulnerability Lab. Steffen Robertz and Gerhard Hechenberger

JSON

To clipboard

{
  "document": {
    "acknowledgments": [
      {
        "organization": "CERTVDE",
        "summary": "coordination",
        "urls": [
          "https://certvde.com"
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      },
      {
        "names": [
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        "organization": "SEC Consult Vulnerability Lab.",
        "summary": "reporting"
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    "csaf_version": "2.0",
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        "text": "A Denial-of-Service Vulnerability was reported in CODESYS 2.3 Runtime. The CODESYS 2.3 Runtime is an essential component in several WAGO PLC\u0027s. All vulnerable PLCs are listed in chapter \u0027Affected Products\u0027.",
        "title": "Summary"
      },
      {
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        "text": "The reported vulnerabilities allow an attacker who has access to the device and is able to exploit the vulnerability, to manipulate and disrupt the CODESYS 2.3 Runtime of the device.",
        "title": "Impact"
      },
      {
        "category": "description",
        "text": "1. Use general security best practices to protect systems from local and network attacks. \n 2. Do not allow direct access to the device from untrusted networks. \n 3. Update to the latest firmware according to the table in chapter solutions. \n 4. Disable the CODESYS 2.3 port 2455. ",
        "title": "Mitigation"
      }
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      },
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        "relates_to_product_reference": "CSAFPID-11012"
      },
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      },
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      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-34593",
      "cwe": {
        "id": "CWE-755",
        "name": "Improper Handling of Exceptional Conditions"
      },
      "notes": [
        {
          "category": "summary",
          "text": "In CODESYS V2 Runtime Toolkit 32 Bit full and PLCWinNT prior to versions V2.4.7.56 unauthenticated crafted invalid requests may result in several denial-of-service conditions. Running PLC programs may be stopped, memory may be leaked, or further communication clients may be blocked from accessing the PLC."
        }
      ],
      "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"
        ],
        "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"
        ]
      },
      "remediations": [
        {
          "category": "mitigation",
          "details": "1. Use general security best practices to protect systems from local and network attacks. \n 2. Do not allow direct access to the device from untrusted networks. \n 3. Update to the latest firmware according to the table in chapter solutions. \n 4. Disable the CODESYS 2.3 port 2455.",
          "group_ids": [
            "CSAFGID-0001"
          ]
        }
      ],
      "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"
          ]
        }
      ],
      "title": "CVE-2021-34593"
    }
  ]
}

CVE-2021-34593 (GCVE-0-2021-34593)

Vulnerability from cvelistv5 – Published: 2021-10-26 09:55 – Updated: 2024-09-17 04:10

Title

CODESYS V2 runtime: unauthenticated invalid requests may result in denial-of-service

Summary

In CODESYS V2 Runtime Toolkit 32 Bit full and PLCWinNT prior to versions V2.4.7.56 unauthenticated crafted invalid requests may result in several denial-of-service conditions. Running PLC programs may be stopped, memory may be leaked, or further communication clients may be blocked from accessing the PLC.

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-755 - Improper Handling of Exceptional Conditions

Assigner

CERTVDE

References

URL

Tags

	https://customers.codesys.com/index.php?eID=dumpF…	x_refsource_CONFIRM
	http://seclists.org/fulldisclosure/2021/Oct/64	mailing-listx_refsource_FULLDISC
	http://packetstormsecurity.com/files/164716/CODES…	x_refsource_MISC
	http://packetstormsecurity.com/files/165874/WAGO-…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	CODESYS	CODESYS V2	Affected: Runtime Toolkit 32 bit full , < V2.4.7.56 (custom) Affected: PLCWinNT , < V2.4.7.56 (custom)

Date Public ?

2021-10-25 00:00

Credits

This issue was discovered by Steffen Robertz and Gerhard Hechenberger from the SEC Consult Vulnerability Lab.

Show details on NVD website

JSON

To clipboard

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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.

Detection rules are retrieved from Rulezet.

Action not permitted

VDE-2021-049

CVE-2021-34593 (GCVE-0-2021-34593)

Tags

Sightings

Nomenclature