FKIE_CVE-2021-31337

Vulnerability from fkie_nvd - Published: 2021-06-28 13:15 - Updated: 2026-06-17 03:51
Severity
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
The Telnet service of the SIMATIC HMI Comfort Panels system component in affected products does not require authentication, which may allow a remote attacker to gain access to the device if the service is enabled. Telnet is disabled by default on the SINAMICS Medium Voltage Products (SINAMICS SL150: All versions, SINAMICS SM150: All versions, SINAMICS SM150i: All versions).
References
productcert@siemens.comhttps://us-cert.cisa.gov/ics/advisories/icsa-21-131-04Not Applicable, Third Party Advisory, US Government Resource
af854a3a-2127-422b-91ae-364da2661108https://us-cert.cisa.gov/ics/advisories/icsa-21-131-04Not Applicable, Third Party Advisory, US Government Resource
Impacted products
Vendor Product Version
siemens sinamics_sl150_firmware *
siemens sinamics_sl150 -
siemens sinamics_sm150_firmware *
siemens sinamics_sm150 -
siemens sinamics_sm150i_firmware *
siemens sinamics_sm150i -
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "SINAMICS Medium Voltage Products",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "SINAMICS SL150: All versions, SINAMICS SM150: All versions, SINAMICS SM150i: All versions"
            }
          ]
        }
      ],
      "source": "productcert@siemens.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:siemens:sinamics_sl150_firmware:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "E032554B-7F51-4482-AF55-743FFB5AC352",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:siemens:sinamics_sl150:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "C6619B0F-7CDC-40A6-89B2-C6067AF45214",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:siemens:sinamics_sm150_firmware:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "33B7E1DE-61B5-4CFC-8640-EB8029CD79D6",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:siemens:sinamics_sm150:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "2AE231E2-2B2B-407A-BF7A-9EA35F394229",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:siemens:sinamics_sm150i_firmware:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "D6067521-A21D-4B2A-AFB2-2E033F66B63E",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:siemens:sinamics_sm150i:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "A44DEAD8-8DB8-41CC-9495-B842BE76EA8F",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The Telnet service of the SIMATIC HMI Comfort Panels system component in affected products does not require authentication, which may allow a remote attacker to gain access to the device if the service is enabled. Telnet is disabled by default on the SINAMICS Medium Voltage Products (SINAMICS SL150: All versions, SINAMICS SM150: All versions, SINAMICS SM150i: All versions)."
    },
    {
      "lang": "es",
      "value": "El servicio Telnet del componente del sistema SIMATIC HMI Comfort Panels en los productos afectados no requiere autenticaci\u00f3n, lo que puede permitir a un atacante remoto conseguir acceso al dispositivo si el servicio est\u00e1 habilitado. Telnet est\u00e1 desactivado por defecto en los productos SINAMICS Medium Voltage (SINAMICS SL150: Todas las versiones, SINAMICS SM150: Todas las versiones, SINAMICS SM150i: Todas las versiones)"
    }
  ],
  "id": "CVE-2021-31337",
  "lastModified": "2026-06-17T03:51:34.163",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 6.8,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 8.6,
        "impactScore": 6.4,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-06-28T13:15:20.840",
  "references": [
    {
      "source": "productcert@siemens.com",
      "tags": [
        "Not Applicable",
        "Third Party Advisory",
        "US Government Resource"
      ],
      "url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-131-04"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Not Applicable",
        "Third Party Advisory",
        "US Government Resource"
      ],
      "url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-131-04"
    }
  ],
  "sourceIdentifier": "productcert@siemens.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-306"
        }
      ],
      "source": "productcert@siemens.com",
      "type": "Secondary"
    }
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.



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.