msrc_cve-2024-21397
Vulnerability from csaf_microsoft
Published
2024-02-13 08:00
Modified
2024-02-13 08:00
Summary
Microsoft Azure File Sync 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.



{
  "document": {
    "acknowledgments": [
      {
        "names": [
          "3wyeye5 with OSR"
        ]
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    ],
    "aggregate_severity": {
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      "text": "Important"
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    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Public",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
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    "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-2024-21397 Microsoft Azure File Sync Elevation of Privilege Vulnerability - HTML",
        "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21397"
      },
      {
        "category": "self",
        "summary": "CVE-2024-21397 Microsoft Azure File Sync Elevation of Privilege Vulnerability - CSAF",
        "url": "https://msrc.microsoft.com/csaf/advisories/2024/msrc_cve-2024-21397.json"
      },
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      },
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        "summary": "Microsoft Support Lifecycle",
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      {
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        "summary": "Common Vulnerability Scoring System",
        "url": "https://www.first.org/cvss"
      }
    ],
    "title": "Microsoft Azure File Sync Elevation of Privilege Vulnerability",
    "tracking": {
      "current_release_date": "2024-02-13T08:00:00.000Z",
      "generator": {
        "date": "2025-05-03T01:36:59.826Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
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      "id": "msrc_CVE-2024-21397",
      "initial_release_date": "2024-02-13T08:00:00.000Z",
      "revision_history": [
        {
          "date": "2024-02-13T08:00:00.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c16.2",
            "product": {
              "name": "Azure File Sync v16.0 \u003c16.2",
              "product_id": "1"
            }
          },
          {
            "category": "product_version",
            "name": "16.2",
            "product": {
              "name": "Azure File Sync v16.0 16.2",
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        ],
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        "name": "Azure File Sync v16.0"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c16.2",
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              "product_id": "2"
            }
          },
          {
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        "name": "Azure File Sync v14.0"
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          },
          {
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  },
  "vulnerabilities": [
    {
      "cve": "CVE-2024-21397",
      "cwe": {
        "id": "CWE-59",
        "name": "Improper Link Resolution Before File Access (\u0027Link Following\u0027)"
      },
      "notes": [
        {
          "category": "general",
          "text": "Microsoft",
          "title": "Assigning CNA"
        },
        {
          "category": "faq",
          "text": "Successful exploitation of this vulnerability requires an attacker to gather information specific to the environment and take additional actions prior to exploitation to prepare the target environment.",
          "title": "According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?"
        },
        {
          "category": "faq",
          "text": "An attacker can create new files in directories they do not normally have access to. Those can only be on directories where Azure File Sync is configured, which could include SYSTEM directories. However, the attacker would not gain privileges to read, modify, or delete files.",
          "title": "What privileges could be gained by an attacker who successfully exploited this vulnerability?"
        },
        {
          "category": "faq",
          "text": "An attacker who successfully exploited this vulnerability could affect the integrity because they could create new files in system directories. Confidentiality is not affected by a successful attack, because the attacker cannot modify, delete, or read files. A successful exploitation could have come impact on availability because there could be some interruption to the availability of the file server.",
          "title": "According to the CVSS metrics, successful exploitation of this vulnerability would not impact confidentiality (C:N), but would have a major impact on integrity (I:H) and have less impact on availability (A:L). What does that mean for this vulnerability?"
        }
      ],
      "product_status": {
        "fixed": [
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          "12297",
          "12298",
          "12299"
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        "known_affected": [
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          "2",
          "3",
          "4"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2024-21397 Microsoft Azure File Sync Elevation of Privilege Vulnerability - HTML",
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21397"
        },
        {
          "category": "self",
          "summary": "CVE-2024-21397 Microsoft Azure File Sync Elevation of Privilege Vulnerability - CSAF",
          "url": "https://msrc.microsoft.com/csaf/advisories/2024/msrc_cve-2024-21397.json"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2024-02-13T08:00:00.000Z",
          "details": "16.2:Security Update:https://catalog.update.microsoft.com/Search.aspx?q=5023052",
          "product_ids": [
            "1",
            "2",
            "3"
          ],
          "url": "https://catalog.update.microsoft.com/Search.aspx?q=5023052"
        },
        {
          "category": "vendor_fix",
          "date": "2024-02-13T08:00:00.000Z",
          "details": "17.1:Security Update:https://catalog.update.microsoft.com/Search.aspx?q=5023054",
          "product_ids": [
            "4"
          ],
          "url": "https://catalog.update.microsoft.com/Search.aspx?q=5023054"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "LOW",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "environmentalsScore": 0.0,
            "exploitCodeMaturity": "PROOF_OF_CONCEPT",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "remediationLevel": "OFFICIAL_FIX",
            "reportConfidence": "CONFIRMED",
            "scope": "UNCHANGED",
            "temporalScore": 4.8,
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L/E:P/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "1",
            "2",
            "3",
            "4"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Elevation of Privilege"
        },
        {
          "category": "exploit_status",
          "details": "Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely"
        }
      ],
      "title": "Microsoft Azure File Sync Elevation of Privilege Vulnerability"
    }
  ]
}


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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
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  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.


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