Vulnerability-Lookup

CNVD-2020-51248

Vulnerability from cnvd - Published: 2020-09-10

Title

多款Siemens产品身份验证期间密码保护不当漏洞

Description

Siemens SIMATIC S7-300 CPU是西门子（Siemens）公司的一款用于制造行业的模块化通用控制器。Siemens SIMATIC S7-400 CPU系列中的产品已被设计用于工业环境中的过程控制。多款Siemens产品存在安全漏洞。攻击者可利用漏洞拦截网络流量以获得有效的PLC凭据。

Severity

中

Patch Name

多款Siemens产品身份验证期间密码保护不当漏洞的补丁

Patch Description

Siemens SIMATIC S7-300 CPU是西门子（Siemens）公司的一款用于制造行业的模块化通用控制器。Siemens SIMATIC S7-400 CPU系列中的产品已被设计用于工业环境中的过程控制。多款Siemens产品存在安全漏洞。攻击者可利用漏洞拦截网络流量以获得有效的PLC凭据。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

用户可参考如下供应商提供的安全公告获得补丁信息： https://cert-portal.siemens.com/productcert/pdf/ssa-381684.pdf

Reference

https://cert-portal.siemens.com/productcert/pdf/ssa-381684.pdf

Impacted products

Name
['Siemens SIMATIC S7-400 CPU family (incl. SIPLUS vari-ants)', 'Siemens SIMATIC S7-300 CPU family (incl. related ET200CPUs and SIPLUS variants)']

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-15791"
    }
  },
  "description": "Siemens SIMATIC S7-300 CPU\u662f\u897f\u95e8\u5b50\uff08Siemens\uff09\u516c\u53f8\u7684\u4e00\u6b3e\u7528\u4e8e\u5236\u9020\u884c\u4e1a\u7684\u6a21\u5757\u5316\u901a\u7528\u63a7\u5236\u5668\u3002Siemens SIMATIC S7-400 CPU\u7cfb\u5217\u4e2d\u7684\u4ea7\u54c1\u5df2\u88ab\u8bbe\u8ba1\u7528\u4e8e\u5de5\u4e1a\u73af\u5883\u4e2d\u7684\u8fc7\u7a0b\u63a7\u5236\u3002\n\n\u591a\u6b3eSiemens\u4ea7\u54c1\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u6f0f\u6d1e\u62e6\u622a\u7f51\u7edc\u6d41\u91cf\u4ee5\u83b7\u5f97\u6709\u6548\u7684PLC\u51ed\u636e\u3002",
  "formalWay": "\u7528\u6237\u53ef\u53c2\u8003\u5982\u4e0b\u4f9b\u5e94\u5546\u63d0\u4f9b\u7684\u5b89\u5168\u516c\u544a\u83b7\u5f97\u8865\u4e01\u4fe1\u606f\uff1a\r\nhttps://cert-portal.siemens.com/productcert/pdf/ssa-381684.pdf",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2020-51248",
  "openTime": "2020-09-10",
  "patchDescription": "Siemens SIMATIC S7-300 CPU\u662f\u897f\u95e8\u5b50\uff08Siemens\uff09\u516c\u53f8\u7684\u4e00\u6b3e\u7528\u4e8e\u5236\u9020\u884c\u4e1a\u7684\u6a21\u5757\u5316\u901a\u7528\u63a7\u5236\u5668\u3002Siemens SIMATIC S7-400 CPU\u7cfb\u5217\u4e2d\u7684\u4ea7\u54c1\u5df2\u88ab\u8bbe\u8ba1\u7528\u4e8e\u5de5\u4e1a\u73af\u5883\u4e2d\u7684\u8fc7\u7a0b\u63a7\u5236\u3002\r\n\r\n\u591a\u6b3eSiemens\u4ea7\u54c1\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u6f0f\u6d1e\u62e6\u622a\u7f51\u7edc\u6d41\u91cf\u4ee5\u83b7\u5f97\u6709\u6548\u7684PLC\u51ed\u636e\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "\u591a\u6b3eSiemens\u4ea7\u54c1\u8eab\u4efd\u9a8c\u8bc1\u671f\u95f4\u5bc6\u7801\u4fdd\u62a4\u4e0d\u5f53\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": [
      "Siemens SIMATIC S7-400 CPU family (incl. SIPLUS vari-ants)",
      "Siemens SIMATIC S7-300 CPU family (incl. related ET200CPUs and SIPLUS variants)"
    ]
  },
  "referenceLink": "https://cert-portal.siemens.com/productcert/pdf/ssa-381684.pdf",
  "serverity": "\u4e2d",
  "submitTime": "2020-09-09",
  "title": "\u591a\u6b3eSiemens\u4ea7\u54c1\u8eab\u4efd\u9a8c\u8bc1\u671f\u95f4\u5bc6\u7801\u4fdd\u62a4\u4e0d\u5f53\u6f0f\u6d1e"
}

CVE-2020-15791 (GCVE-0-2020-15791)

Vulnerability from cvelistv5 – Published: 2020-09-09 18:13 – Updated: 2026-06-02 18:45

Summary

A vulnerability has been identified in SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions), SIMATIC S7-400 CPU family (incl. SIPLUS variants) (All versions), SIMATIC WinAC RTX (F) 2010 (All versions), SINUMERIK 840D sl (All versions). The authentication protocol between a client and a PLC via port 102/tcp (ISO-TSAP) insufficiently protects the transmitted password. This could allow an attacker that is able to intercept the network traffic to obtain valid PLC credentials.

Severity

6.5 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-02 18:45 UTC

CWE

CWE-522 - Insufficiently Protected Credentials

Assigner

siemens icscert root

References

1 reference

URL	Tags
https://cert-portal.siemens.com/productcert/pdf/s…	x_refsource_MISC

Impacted products

4 products

Vendor	Product	Version
Siemens	SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants)	Affected: All versions
Siemens	SIMATIC S7-400 CPU family (incl. SIPLUS variants)	Affected: All versions
Siemens	SIMATIC WinAC RTX (F) 2010	Affected: All versions
Siemens	SINUMERIK 840D sl	Affected: All versions

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T13:22:30.753Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-381684.pdf"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "ADJACENT_NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 6.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2020-15791",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-02T18:45:11.766537Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-02T18:45:29.902Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants)",
          "vendor": "Siemens",
          "versions": [
            {
              "status": "affected",
              "version": "All versions"
            }
          ]
        },
        {
          "product": "SIMATIC S7-400 CPU family (incl. SIPLUS variants)",
          "vendor": "Siemens",
          "versions": [
            {
              "status": "affected",
              "version": "All versions"
            }
          ]
        },
        {
          "product": "SIMATIC WinAC RTX (F) 2010",
          "vendor": "Siemens",
          "versions": [
            {
              "status": "affected",
              "version": "All versions"
            }
          ]
        },
        {
          "product": "SINUMERIK 840D sl",
          "vendor": "Siemens",
          "versions": [
            {
              "status": "affected",
              "version": "All versions"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability has been identified in SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions), SIMATIC S7-400 CPU family (incl. SIPLUS variants) (All versions), SIMATIC WinAC RTX (F) 2010 (All versions), SINUMERIK 840D sl (All versions). The authentication protocol between a client and a PLC via port 102/tcp (ISO-TSAP) insufficiently protects the transmitted password. This could allow an attacker that is able to intercept the network traffic to obtain valid PLC credentials."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-522",
              "description": "CWE-522: Insufficiently Protected Credentials",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2020-12-14T21:05:18.000Z",
        "orgId": "cec7a2ec-15b4-4faf-bd53-b40f371f3a77",
        "shortName": "siemens"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-381684.pdf"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "productcert@siemens.com",
          "ID": "CVE-2020-15791",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants)",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "All versions"
                          }
                        ]
                      }
                    },
                    {
                      "product_name": "SIMATIC S7-400 CPU family (incl. SIPLUS variants)",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "All versions"
                          }
                        ]
                      }
                    },
                    {
                      "product_name": "SIMATIC WinAC RTX (F) 2010",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "All versions"
                          }
                        ]
                      }
                    },
                    {
                      "product_name": "SINUMERIK 840D sl",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "All versions"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "Siemens"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "A vulnerability has been identified in SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions), SIMATIC S7-400 CPU family (incl. SIPLUS variants) (All versions), SIMATIC WinAC RTX (F) 2010 (All versions), SINUMERIK 840D sl (All versions). The authentication protocol between a client and a PLC via port 102/tcp (ISO-TSAP) insufficiently protects the transmitted password. This could allow an attacker that is able to intercept the network traffic to obtain valid PLC credentials."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-522: Insufficiently Protected Credentials"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://cert-portal.siemens.com/productcert/pdf/ssa-381684.pdf",
              "refsource": "MISC",
              "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-381684.pdf"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "cec7a2ec-15b4-4faf-bd53-b40f371f3a77",
    "assignerShortName": "siemens",
    "cveId": "CVE-2020-15791",
    "datePublished": "2020-09-09T18:13:11.000Z",
    "dateReserved": "2020-07-15T00:00:00.000Z",
    "dateUpdated": "2026-06-02T18:45:29.902Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.