CVE-2021-42029 (GCVE-0-2021-42029)

Vulnerability from cvelistv5 – Published: 2022-04-12 09:07 – Updated: 2024-08-04 03:22
VLAI
Summary
A vulnerability has been identified in SIMATIC STEP 7 (TIA Portal) V15 (All versions), SIMATIC STEP 7 (TIA Portal) V16 (All versions < V16 Update 5), SIMATIC STEP 7 (TIA Portal) V17 (All versions < V17 Update 2). An attacker could achieve privilege escalation on the web server of certain devices due to improper access control vulnerability in the engineering system software. The attacker needs to have direct access to the impacted web server.
CWE
  • CWE-284 - Improper Access Control
References
Impacted products
Vendor Product Version CPE status
Siemens SIMATIC STEP 7 (TIA Portal) V15 Affected: All versions
guessed Create a notification for this product.
Siemens SIMATIC STEP 7 (TIA Portal) V16 Affected: All versions < V16 Update 5
guessed Create a notification for this product.
Siemens SIMATIC STEP 7 (TIA Portal) V17 Affected: All versions < V17 Update 2
guessed Create a notification for this product.
Show details on NVD website

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          "value": "A vulnerability has been identified in SIMATIC STEP 7 (TIA Portal) V15 (All versions), SIMATIC STEP 7 (TIA Portal) V16 (All versions \u003c V16 Update 5), SIMATIC STEP 7 (TIA Portal) V17 (All versions \u003c V17 Update 2). An attacker could achieve privilege escalation on the web server of certain devices due to improper access control vulnerability in the engineering system software. The attacker needs to have direct access to the impacted web server."
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          "lang": "es",
          "value": "Se ha identificado una vulnerabilidad en SIMATIC STEP 7 (TIA Portal) versi\u00f3n V15 (Todas las versiones), SIMATIC STEP 7 (TIA Portal) versi\u00f3n V16 (todas las versiones anteriores a versi\u00f3n V16 Update 5), SIMATIC STEP 7 (TIA Portal) versi\u00f3n V17 (todas las versiones anteriores a versi\u00f3n V17 Update 2). Un atacante podr\u00eda lograr una escalada de privilegios en el servidor web de determinados dispositivos debido a una vulnerabilidad de control de acceso inapropiada en el software del sistema de ingenier\u00eda. El atacante necesita tener acceso directo al servidor web afectado"
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      "id": "CVE-2021-42029",
      "lastModified": "2024-11-21T06:27:06.913",
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                "negate": false,
                "operator": "OR"
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            ],
            "operator": "AND"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "A vulnerability has been identified in SIMATIC STEP 7 (TIA Portal) V15 (All versions), SIMATIC STEP 7 (TIA Portal) V16 (All versions \u003c V16 Update 5), SIMATIC STEP 7 (TIA Portal) V17 (All versions \u003c V17 Update 2). An attacker could achieve privilege escalation on the web server of certain devices due to improper access control vulnerability in the engineering system software. The attacker needs to have direct access to the impacted web server."
          },
          {
            "lang": "es",
            "value": "Se ha identificado una vulnerabilidad en SIMATIC STEP 7 (TIA Portal) versi\u00f3n V15 (Todas las versiones), SIMATIC STEP 7 (TIA Portal) versi\u00f3n V16 (todas las versiones anteriores a versi\u00f3n V16 Update 5), SIMATIC STEP 7 (TIA Portal) versi\u00f3n V17 (todas las versiones anteriores a versi\u00f3n V17 Update 2). Un atacante podr\u00eda lograr una escalada de privilegios en el servidor web de determinados dispositivos debido a una vulnerabilidad de control de acceso inapropiada en el software del sistema de ingenier\u00eda. El atacante necesita tener acceso directo al servidor web afectado"
          }
        ],
        "id": "CVE-2021-42029",
        "lastModified": "2026-06-17T04:09:12.200",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "HIGH",
              "cvssData": {
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                "accessVector": "LOCAL",
                "authentication": "NONE",
                "availabilityImpact": "COMPLETE",
                "baseScore": 7.2,
                "confidentialityImpact": "COMPLETE",
                "integrityImpact": "COMPLETE",
                "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C",
                "version": "2.0"
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              "exploitabilityScore": 3.9,
              "impactScore": 10.0,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
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          "cvssMetricV31": [
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                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 5.9,
              "source": "nvd@nist.gov",
              "type": "Primary"
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        "published": "2022-04-12T09:15:13.817",
        "references": [
          {
            "source": "productcert@siemens.com",
            "tags": [
              "Patch",
              "Vendor Advisory"
            ],
            "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-350757.pdf"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
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            "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-350757.pdf"
          }
        ],
        "sourceIdentifier": "productcert@siemens.com",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-284"
              }
            ],
            "source": "productcert@siemens.com",
            "type": "Secondary"
          },
          {
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              {
                "lang": "en",
                "value": "NVD-CWE-Other"
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            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "current_release_date": "2026-03-27T13:27:42+00:00",
      "cve": "CVE-2021-42029",
      "id": "CVE-2021-42029",
      "initial_release_date": "2021-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "CVE-2021-42029",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-42029.json",
      "version": "3"
    }
  }
}



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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.

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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.


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