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  "document": {
    "acknowledgments": [
      {
        "organization": "Rockwell Automation",
        "summary": "reporting this vulnerability to CISA"
      }
    ],
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Disclosure is not limited",
      "tlp": {
        "label": "WHITE",
        "url": "https://us-cert.cisa.gov/tlp/"
      }
    },
    "lang": "en-US",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "All information products included in https://us-cert.cisa.gov/ics are provided \"as is\" for informational purposes only. The Department of Homeland Security (DHS) does not provide any warranties of any kind regarding any information contained within. DHS does not endorse any commercial product or service, referenced in this product or otherwise. Further dissemination of this product is governed by the Traffic Light Protocol (TLP) marking in the header. For more information about TLP, see https://us-cert.cisa.gov/tlp/.",
        "title": "Legal Notice"
      },
      {
        "category": "summary",
        "text": "Successful exploitation of this vulnerability could allow an attacker to take over the device.",
        "title": "Risk evaluation"
      },
      {
        "category": "other",
        "text": "Commercial Facilities",
        "title": "Critical infrastructure sectors"
      },
      {
        "category": "other",
        "text": "Worldwide",
        "title": "Countries/areas deployed"
      },
      {
        "category": "other",
        "text": "United States",
        "title": "Company headquarters location"
      },
      {
        "category": "general",
        "text": "CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov/ics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies.",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time. This vulnerability is not exploitable remotely.  This vulnerability has a high attack complexity.",
        "title": "Recommended Practices"
      }
    ],
    "publisher": {
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      "contact_details": "central@cisa.dhs.gov",
      "name": "CISA",
      "namespace": "https://www.cisa.gov/"
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    "references": [
      {
        "category": "self",
        "summary": "ICS Advisory ICSA-25-084-03 JSON",
        "url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2025/icsa-25-084-03.json"
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        "summary": "ICSA Advisory ICSA-25-084-03 - Web Version",
        "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-25-084-03"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://www.cisa.gov/resources-tools/resources/ics-recommended-practices"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://www.cisa.gov/sites/default/files/publications/Cybersecurity_Best_Practices_for_Industrial_Control_Systems.pdf"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://www.cisa.gov/topics/industrial-control-systems"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://www.cisa.gov/uscert/ics/tips/ICS-TIP-12-146-01B"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://www.cisa.gov/uscert/sites/default/files/publications/emailscams0905.pdf"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://www.cisa.gov/uscert/ncas/tips/ST04-014"
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    "title": "Rockwell Automation 440G TLS-Z",
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          "number": "1",
          "summary": "Initial Publication"
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        "name": "Improper Neutralization of Special Elements in Output Used by a Downstream Component (\u0027Injection\u0027)"
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      "notes": [
        {
          "category": "summary",
          "text": "A local code execution vulnerability exists in the STMicroelectronics STM32L4 devices due to having incorrect access controls. The affected product utilizes the STMicroelectronics STM32L4 device and because of the vulnerability, a threat actor could reverse protections that control access to the JTAG interface. If exploited, a threat actor can take over the device. ",
          "title": "Vulnerability Summary"
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          "summary": "www.cve.org",
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          "summary": "www.first.org",
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        {
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          "summary": "www.first.org",
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      "remediations": [
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          "details": "Rockwell Automation encourages users of the affected software to apply the risk mitigations if possible:",
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          "product_ids": [
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          "url": "https://literature.rockwellautomation.com/idc/groups/literature/documents/rm/secure-rm001_-en-p.pdf"
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          "details": "For information on how to mitigate security risks on industrial automation control systems, Rockwell Automation encourage users to implement  security best practices to minimize the risk of the vulnerability.",
          "product_ids": [
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          "details": "For more information refer to Rockwell Automation\u0027s security advisory.",
          "product_ids": [
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      ],
      "operator": "AND"
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "STMicroelectronics STM32L4 devices through 2020-10-19 have incorrect access control. The flash read-out protection (RDP) can be degraded from RDP level 2 (no access via debug interface) to level 1 (limited access via debug interface) by injecting a fault during the boot phase."
    },
    {
      "lang": "es",
      "value": "Los dispositivos STMicroelectronics STM32L4 versi\u00f3n hasta el 2020-10-19, presentan un control de acceso incorrecto.\u0026#xa0;La protecci\u00f3n de lectura flash (RDP) se puede degradar desde el nivel 2 de RDP (sin acceso por medio de la interfaz de depuraci\u00f3n) al nivel 1 (acceso limitado por medio de la interfaz de depuraci\u00f3n) inyectando un fallo durante la fase de arranque"
    }
  ],
  "id": "CVE-2020-27212",
  "lastModified": "2024-11-21T05:20:51.937",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "LOCAL",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 4.4,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:L/AC:M/Au:N/C:P/I:P/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 3.4,
        "impactScore": 6.4,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.0,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.0,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  },
  "published": "2021-05-21T12:15:07.730",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://eprint.iacr.org/2021/640"
    },
    {
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      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://www.aisec.fraunhofer.de/de/das-institut/wissenschaftliche-exzellenz/security-and-trust-in-open-source-security-tokens.html"
    },
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    },
    {
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  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-74"
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      ],
      "source": "nvd@nist.gov",
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}

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-27212",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2020-27212"
    }
  },
  "description": "STMicroelectronics STM32L4\u662f\u610f\u5927\u5229\u548c\u6cd5\u56fdSTMicroelectronics\u516c\u53f8\u7684\u4e00\u7cfb\u5217\u8d85\u4f4e\u529f\u8017\u5fae\u63a7\u5236\u5668\u3002\n\nSTMicroelectronics STM32L4 \u5b58\u5728\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8eflash\u8bfb\u51fa\u4fdd\u62a4\u53ef\u4ee5\u4eceRDP\u7ea7\u522b2\u964d\u4f4e\u5230\u7ea7\u522b1\uff0c\u65b9\u6cd5\u662f\u5728\u542f\u52a8\u9636\u6bb5\u6ce8\u5165\u4e00\u4e2a\u9519\u8bef\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\u3002",
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  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-40516",
  "openTime": "2021-06-09",
  "patchDescription": "STMicroelectronics STM32L4\u662f\u610f\u5927\u5229\u548c\u6cd5\u56fdSTMicroelectronics\u516c\u53f8\u7684\u4e00\u7cfb\u5217\u8d85\u4f4e\u529f\u8017\u5fae\u63a7\u5236\u5668\u3002\r\n\r\nSTMicroelectronics STM32L4 \u5b58\u5728\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8eflash\u8bfb\u51fa\u4fdd\u62a4\u53ef\u4ee5\u4eceRDP\u7ea7\u522b2\u964d\u4f4e\u5230\u7ea7\u522b1\uff0c\u65b9\u6cd5\u662f\u5728\u542f\u52a8\u9636\u6bb5\u6ce8\u5165\u4e00\u4e2a\u9519\u8bef\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\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": "STMicroelectronics STM32L4\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "STMicroelectronics STMicroelectronics STM32L4"
  },
  "referenceLink": "https://www.aisec.fraunhofer.de/en/FirmwareProtection.html",
  "serverity": "\u4e2d",
  "submitTime": "2021-05-31",
  "title": "STMicroelectronics STM32L4\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e"
}