{
  "id": "CVE-2021-45117",
  "sourceIdentifier": "cve@mitre.org",
  "published": "2022-03-21T15:15:07.927",
  "lastModified": "2022-09-03T03:55:39.127",
  "vulnStatus": "Analyzed",
  "descriptions": [
    {
      "lang": "en",
      "value": "The OPC autogenerated ANSI C stack stubs (in the NodeSets) do not handle all error cases. This can lead to a NULL pointer dereference."
    },
    {
      "lang": "es",
      "value": "Los stubs de pila ANSI C autogenerados por OPC (en los NodeSets) no manejan todos los casos de error. Esto puede conllevar a una desreferencia de puntero NULL"
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6
      }
    ],
    "cvssMetricV2": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "2.0",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P",
          "accessVector": "NETWORK",
          "accessComplexity": "MEDIUM",
          "authentication": "NONE",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 4.3
        },
        "baseSeverity": "MEDIUM",
        "exploitabilityScore": 8.6,
        "impactScore": 2.9,
        "acInsufInfo": false,
        "obtainAllPrivilege": false,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ]
  },
  "weaknesses": [
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:opcfoundation:ua-nodeset:*:*:*:*:*:*:*:*",
              "versionEndExcluding": "1.05.01",
              "matchCriteriaId": "14F2AA77-409B-48CA-9BBE-6EC6B5BA9EAF"
            }
          ]
        }
      ]
    },
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:siemens:simatic_net_pc:14:-:*:*:*:*:*:*",
              "matchCriteriaId": "298E8F34-346B-4FC5-8690-3F947F585552"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:siemens:simatic_net_pc:15:-:*:*:*:*:*:*",
              "matchCriteriaId": "7DF90C44-4AC2-4B2B-8712-30CD3DE96B22"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:siemens:simatic_net_pc:16:-:*:*:*:*:*:*",
              "matchCriteriaId": "496E3C43-5DA8-4983-8AC6-0F32454E22F3"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:siemens:simatic_net_pc:17:-:*:*:*:*:*:*",
              "matchCriteriaId": "AFBD6DDF-917C-44CC-A944-1945DC7AC9FB"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:siemens:sitop_manager:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "4F1ABC40-2C91-4EA9-9442-16E5D7C29E52"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:siemens:telecontrol_server_basic:3.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "975FC6E7-8FDB-4361-A691-44B26B0CBFD4"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-285795.pdf",
      "source": "cve@mitre.org",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://files.opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2021-45117.pdf",
      "source": "cve@mitre.org",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://www.youtube.com/watch?v=qv-RBdCaV4k",
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ]
    }
  ]
}