msrc_cve-2025-21370
Vulnerability from csaf_microsoft
Published
2025-01-14 08:00
Modified
2025-01-14 08:00
Summary
Windows Virtualization-Based Security (VBS) Enclave Elevation of Privilege Vulnerability

Notes

Additional Resources
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle
Disclaimer
The information provided in the Microsoft Knowledge Base is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.
Customer Action
Required. The vulnerability documented by this CVE requires customer action to resolve.


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{
  "document": {
    "acknowledgments": [
      {
        "names": [
          "Alex Ionescu,\u00a0working for Winsider Seminars \u0026 Solutions, Inc."
        ]
      }
    ],
    "aggregate_severity": {
      "namespace": "https://www.microsoft.com/en-us/msrc/security-update-severity-rating-system",
      "text": "Important"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Public",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en-US",
    "notes": [
      {
        "category": "general",
        "text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
        "title": "Disclaimer"
      },
      {
        "category": "general",
        "text": "Required. The vulnerability documented by this CVE requires customer action to resolve.",
        "title": "Customer Action"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "secure@microsoft.com",
      "name": "Microsoft Security Response Center",
      "namespace": "https://msrc.microsoft.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "CVE-2025-21370 Windows Virtualization-Based Security (VBS) Enclave Elevation of Privilege Vulnerability - HTML",
        "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21370"
      },
      {
        "category": "self",
        "summary": "CVE-2025-21370 Windows Virtualization-Based Security (VBS) Enclave Elevation of Privilege Vulnerability - CSAF",
        "url": "https://msrc.microsoft.com/csaf/advisories/2025/msrc_cve-2025-21370.json"
      },
      {
        "category": "external",
        "summary": "Microsoft Exploitability Index",
        "url": "https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1"
      },
      {
        "category": "external",
        "summary": "Microsoft Support Lifecycle",
        "url": "https://support.microsoft.com/lifecycle"
      },
      {
        "category": "external",
        "summary": "Common Vulnerability Scoring System",
        "url": "https://www.first.org/cvss"
      }
    ],
    "title": "Windows Virtualization-Based Security (VBS) Enclave Elevation of Privilege Vulnerability",
    "tracking": {
      "current_release_date": "2025-01-14T08:00:00.000Z",
      "generator": {
        "date": "2025-04-02T13:22:58.414Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2025-21370",
      "initial_release_date": "2025-01-14T08:00:00.000Z",
      "revision_history": [
        {
          "date": "2025-01-14T08:00:00.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c10.0.22621.4751",
            "product": {
              "name": "Windows 11 Version 22H2 for ARM64-based Systems \u003c10.0.22621.4751",
              "product_id": "6"
            }
          },
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            "name": "10.0.22621.4751",
            "product": {
              "name": "Windows 11 Version 22H2 for ARM64-based Systems 10.0.22621.4751",
              "product_id": "12085"
            }
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        ],
        "category": "product_name",
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            }
          },
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              "product_id": "4"
            }
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            "category": "product_version",
            "name": "10.0.22631.4751",
            "product": {
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              "product_id": "12242"
            }
          }
        ],
        "category": "product_name",
        "name": "Windows 11 Version 23H2 for ARM64-based Systems"
      },
      {
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            "product": {
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              "product_id": "3"
            }
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            "category": "product_version",
            "name": "10.0.22631.4751",
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            }
          }
        ],
        "category": "product_name",
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  },
  "vulnerabilities": [
    {
      "cve": "CVE-2025-21370",
      "cwe": {
        "id": "CWE-20",
        "name": "Improper Input Validation"
      },
      "notes": [
        {
          "category": "general",
          "text": "Microsoft",
          "title": "Assigning CNA"
        },
        {
          "category": "faq",
          "text": "An attacker who successfully exploited this vulnerability could potentially leak data from the target enclave or execute code within the context of the target enclave.",
          "title": "What privileges would an attacker gain by successfully exploiting this vulnerability?"
        },
        {
          "category": "faq",
          "text": "The changes to address this vulnerability updated Virtual Secure Mode components. The policy described in Guidance for blocking rollback of Virtualization-based Security (VBS) related security updates has been updated to account for the latest changes. If you deployed this policy, then you\u0027ll need to redeploy using the updated policy.",
          "title": "Are there any additional steps that I need to follow to be protected from this vulnerability?"
        }
      ],
      "product_status": {
        "fixed": [
          "12085",
          "12086",
          "12242",
          "12243",
          "12389",
          "12390"
        ],
        "known_affected": [
          "1",
          "2",
          "3",
          "4",
          "5",
          "6"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2025-21370 Windows Virtualization-Based Security (VBS) Enclave Elevation of Privilege Vulnerability - HTML",
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21370"
        },
        {
          "category": "self",
          "summary": "CVE-2025-21370 Windows Virtualization-Based Security (VBS) Enclave Elevation of Privilege Vulnerability - CSAF",
          "url": "https://msrc.microsoft.com/csaf/advisories/2025/msrc_cve-2025-21370.json"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2025-01-14T08:00:00.000Z",
          "details": "10.0.22621.4751:Security Update:https://support.microsoft.com/help/5050021",
          "product_ids": [
            "6",
            "5"
          ],
          "url": "https://support.microsoft.com/help/5050021"
        },
        {
          "category": "vendor_fix",
          "date": "2025-01-14T08:00:00.000Z",
          "details": "10.0.22631.4751:Security Update:https://support.microsoft.com/help/5050021",
          "product_ids": [
            "4",
            "3"
          ],
          "url": "https://support.microsoft.com/help/5050021"
        },
        {
          "category": "vendor_fix",
          "date": "2025-01-14T08:00:00.000Z",
          "details": "10.0.26100.2894:Security Update:https://support.microsoft.com/help/5050009",
          "product_ids": [
            "2",
            "1"
          ],
          "url": "https://support.microsoft.com/help/5050009"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "environmentalsScore": 0.0,
            "exploitCodeMaturity": "UNPROVEN",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "remediationLevel": "OFFICIAL_FIX",
            "reportConfidence": "CONFIRMED",
            "scope": "UNCHANGED",
            "temporalScore": 6.8,
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "1",
            "2",
            "3",
            "4",
            "5",
            "6"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Elevation of Privilege"
        },
        {
          "category": "exploit_status",
          "details": "Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely"
        }
      ],
      "title": "Windows Virtualization-Based Security (VBS) Enclave Elevation of Privilege Vulnerability"
    }
  ]
}


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