GSD-2021-37186

Vulnerability from gsd - Updated: 2023-12-13 01:23
Details
A vulnerability has been identified in LOGO! CMR2020 (All versions < V2.2), LOGO! CMR2040 (All versions < V2.2), SIMATIC RTU3010C (All versions < V4.0.9), SIMATIC RTU3030C (All versions < V4.0.9), SIMATIC RTU3031C (All versions < V4.0.9), SIMATIC RTU3041C (All versions < V4.0.9). The underlying TCP/IP stack does not properly calculate the random numbers used as ISN (Initial Sequence Numbers). An adjacent attacker with network access to the LAN interface could interfere with traffic, spoof the connection and gain access to sensitive information.
Aliases
Aliases
CVE-2021-37186
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{
  "GSD": {
    "alias": "CVE-2021-37186",
    "description": "A vulnerability has been identified in LOGO! CMR2020 (All versions \u003c V2.2), LOGO! CMR2040 (All versions \u003c V2.2), SIMATIC RTU 3000 family (All versions). The underlying TCP/IP stack does not properly calculate the random numbers used as ISN (Initial Sequence Numbers). An adjacent attacker with network access to the LAN interface could interfere with traffic, spoof the connection and gain access to sensitive information.",
    "id": "GSD-2021-37186"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-37186"
      ],
      "details": "A vulnerability has been identified in LOGO! CMR2020 (All versions \u003c V2.2), LOGO! CMR2040 (All versions \u003c V2.2), SIMATIC RTU3010C (All versions \u003c V4.0.9), SIMATIC RTU3030C (All versions \u003c V4.0.9), SIMATIC RTU3031C (All versions \u003c V4.0.9), SIMATIC RTU3041C (All versions \u003c V4.0.9). The underlying TCP/IP stack does not properly calculate the random numbers used as ISN (Initial Sequence Numbers). An adjacent attacker with network access to the LAN interface could interfere with traffic, spoof the connection and gain access to sensitive information.",
      "id": "GSD-2021-37186",
      "modified": "2023-12-13T01:23:10.165803Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
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        "ID": "CVE-2021-37186",
        "STATE": "PUBLIC"
      },
      "affects": {
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          }
        ]
      },
      "problemtype": {
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                "value": "CWE-330: Use of Insufficiently Random Values"
              }
            ]
          }
        ]
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            "name": "https://cert-portal.siemens.com/productcert/pdf/ssa-316383.pdf",
            "refsource": "MISC",
            "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-316383.pdf"
          }
        ]
      }
    },
    "nvd.nist.gov": {
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          "ID": "CVE-2021-37186"
        },
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        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
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              "value": "A vulnerability has been identified in LOGO! CMR2020 (All versions \u003c V2.2), LOGO! CMR2040 (All versions \u003c V2.2), SIMATIC RTU3010C (All versions \u003c V4.0.9), SIMATIC RTU3030C (All versions \u003c V4.0.9), SIMATIC RTU3031C (All versions \u003c V4.0.9), SIMATIC RTU3041C (All versions \u003c V4.0.9). The underlying TCP/IP stack does not properly calculate the random numbers used as ISN (Initial Sequence Numbers). An adjacent attacker with network access to the LAN interface could interfere with traffic, spoof the connection and gain access to sensitive information."
            }
          ]
        },
        "problemtype": {
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              "name": "https://cert-portal.siemens.com/productcert/pdf/ssa-316383.pdf",
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              "tags": [
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                "Vendor Advisory"
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              "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-316383.pdf"
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      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "ADJACENT_NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 4.8,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:A/AC:L/Au:N/C:P/I:P/A:N",
            "version": "2.0"
          },
          "exploitabilityScore": 6.5,
          "impactScore": 4.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.4,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 2.8,
          "impactScore": 2.5
        }
      },
      "lastModifiedDate": "2022-04-29T17:19Z",
      "publishedDate": "2021-09-14T11:15Z"
    }
  }
}


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  • 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.
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