Vulnerability-Lookup

CVE-2021-34581 (GCVE-0-2021-34581)

Vulnerability from cvelistv5 – Published: 2021-08-31 10:33 – Updated: 2024-09-17 00:42

Title

WAGO: Denial of Service vulnerability inside the OpenSSL implementation

Summary

Missing Release of Resource after Effective Lifetime vulnerability in OpenSSL implementation of WAGO 750-831/xxx-xxx, 750-880/xxx-xxx, 750-881, 750-889 in versions FW4 up to FW15 allows an unauthenticated attacker to cause DoS on the device.

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-772 - Missing Release of Resource after Effective Lifetime

Assigner

CERTVDE icscert root

References

1 reference

URL	Tags
https://cert.vde.com/en-us/advisories/vde-2021-038	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version	CPE status
WAGO	750-831/xxx-xxx, 750-880/xxx-xxx, 750-881, 750-889	Affected: FW4 , < All* (custom)	guessed

Date Public

2021-08-31 00:00

Credits

These vulnerabilities were reported to WAGO by: Uwe Disch. Coordination done by CERT@VDE

Show details on NVD website

JSON

To clipboard

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    "redhat_vex": {
      "current_release_date": "2026-03-27T13:55:27+00:00",
      "cve": "CVE-2021-34581",
      "id": "CVE-2021-34581",
      "initial_release_date": "2021-08-31T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "WAGO: Denial of Service vulnerability inside the OpenSSL implementation",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-34581.json",
      "version": "3"
    }
  }
}

FKIE_CVE-2021-34581

Vulnerability from fkie_nvd - Published: 2021-08-31 11:15 - Updated: 2026-06-17 03:56

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Summary

References

	URL	Tags
	info@cert.vde.com	https://cert.vde.com/en-us/advisories/vde-2021-038	Third Party Advisory
	af854a3a-2127-422b-91ae-364da2661108	https://cert.vde.com/en-us/advisories/vde-2021-038	Third Party Advisory

Impacted products

Vendor	Product	Version
wago	750-880\/040-000_firmware	*
wago	750-880\/040-000	-
wago	750-880\/025-002_firmware	*
wago	750-880\/025-002	-
wago	750-880\/025-001_firmware	*
wago	750-880\/025-001	-
wago	750-880\/025-000_firmware	*
wago	750-880\/025-000	-
wago	750-831\/000-002_firmware	*
wago	750-831\/000-002	-
wago	750-889_firmware	*
wago	750-889	-
wago	750-881_firmware	*
wago	750-881	-
wago	750-831_firmware	*
wago	750-831	-
wago	750-880_firmware	*
wago	750-880	-

JSON

To clipboard

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          "product": "750-831/xxx-xxx, 750-880/xxx-xxx, 750-881, 750-889",
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    }
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  "lastModified": "2026-06-17T03:56:10.183",
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      "source": "info@cert.vde.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-772"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

GHSA-V448-M2G5-FM7C

Vulnerability from github – Published: 2022-05-24 19:12 – Updated: 2022-05-24 19:12

Details

Show details on source website

JSON

To clipboard

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  "affected": [],
  "aliases": [
    "CVE-2021-34581"
  ],
  "database_specific": {
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    "github_reviewed_at": null,
    "nvd_published_at": "2021-08-31T11:15:00Z",
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  },
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  "id": "GHSA-v448-m2g5-fm7c",
  "modified": "2022-05-24T19:12:37Z",
  "published": "2022-05-24T19:12:37Z",
  "references": [
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      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-34581"
    },
    {
      "type": "WEB",
      "url": "https://cert.vde.com/en-us/advisories/vde-2021-038"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

GSD-2021-34581

Vulnerability from gsd - Updated: 2023-12-13 01:23

Details

Aliases

CVE-2021-34581

Aliases

CVE-2021-34581

JSON

To clipboard

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      "remediation": "unknown",
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}

VDE-2021-038

Vulnerability from csaf_wagogmbhcokg - Published: 2021-08-31 07:00 - Updated: 2025-05-14 12:53

Summary

WAGO: OpenSSL DoS Vulnerability in PLCs

Scope

1 vulnerability in this advisory, including CVE-2021-34581.

CVE-2021-34581

7.5 (High)


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

Known affected: 4 products

Open the full advisory

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2021-34581 (GCVE-0-2021-34581)

FKIE_CVE-2021-34581

GHSA-V448-M2G5-FM7C

GSD-2021-34581

VDE-2021-038

Tags

Sightings

Nomenclature

Related by attack behaviour