{
  "document": {
    "acknowledgments": [
      {
        "names": [
          "Anonymous"
        ]
      },
      {
        "names": [
          "alirez"
        ]
      },
      {
        "names": [
          "Anonymous"
        ]
      }
    ],
    "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-2024-21390 Microsoft Authenticator Elevation of Privilege Vulnerability - HTML",
        "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21390"
      },
      {
        "category": "self",
        "summary": "CVE-2024-21390 Microsoft Authenticator Elevation of Privilege Vulnerability - CSAF",
        "url": "https://msrc.microsoft.com/csaf/advisories/2024/msrc_cve-2024-21390.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": "Microsoft Authenticator Elevation of Privilege Vulnerability",
    "tracking": {
      "current_release_date": "2024-03-12T07:00:00.000Z",
      "generator": {
        "date": "2025-05-03T00:46:37.523Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2024-21390",
      "initial_release_date": "2024-03-12T07:00:00.000Z",
      "revision_history": [
        {
          "date": "2024-03-12T07:00:00.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c6.2401.0617",
            "product": {
              "name": "Microsoft Authenticator \u003c6.2401.0617",
              "product_id": "1"
            }
          },
          {
            "category": "product_version",
            "name": "6.2401.0617",
            "product": {
              "name": "Microsoft Authenticator 6.2401.0617",
              "product_id": "12292"
            }
          }
        ],
        "category": "product_name",
        "name": "Microsoft Authenticator"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2024-21390",
      "cwe": {
        "id": "CWE-287",
        "name": "Improper Authentication"
      },
      "notes": [
        {
          "category": "general",
          "text": "Microsoft",
          "title": "Assigning CNA"
        },
        {
          "category": "faq",
          "text": "An attacker would have to have local presence on the device through malware or a malicious application to be able to exploit this vulnerability.",
          "title": "According to the CVSS metric, Attack Vector is Local (AV:L). What does that mean for this vulnerability?"
        },
        {
          "category": "faq",
          "text": "The victim will have to close and re-open the Authenticator app for the attacker to exploit this vulnerability.",
          "title": "According to the CVSS metric, User Interaction is Required (UI:R). What interaction would the user have to do?"
        },
        {
          "category": "faq",
          "text": "Exploitation of this vulnerability could allow an attacker to gain access to multi-factor authentication codes for the victim\u0027s accounts, as well as modify or delete accounts in the authenticator app but not prevent the app from launching or running.",
          "title": "According to the CVSS metric, Confidentiality and Integrity impact are High and Availability is None (C:H, I:H, A:N). What does that mean for this vulnerability?"
        }
      ],
      "product_status": {
        "fixed": [
          "12292"
        ],
        "known_affected": [
          "1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2024-21390 Microsoft Authenticator Elevation of Privilege Vulnerability - HTML",
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21390"
        },
        {
          "category": "self",
          "summary": "CVE-2024-21390 Microsoft Authenticator Elevation of Privilege Vulnerability - CSAF",
          "url": "https://msrc.microsoft.com/csaf/advisories/2024/msrc_cve-2024-21390.json"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2024-03-12T07:00:00.000Z",
          "details": "6.2401.0617:Security Update:https://learn.microsoft.com/en-us/entra/fundamentals/whats-new",
          "product_ids": [
            "1"
          ],
          "url": "https://learn.microsoft.com/en-us/entra/fundamentals/whats-new"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "environmentalsScore": 0.0,
            "exploitCodeMaturity": "UNPROVEN",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "remediationLevel": "OFFICIAL_FIX",
            "reportConfidence": "CONFIRMED",
            "scope": "UNCHANGED",
            "temporalScore": 6.2,
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "1"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Elevation of Privilege"
        },
        {
          "category": "exploit_status",
          "details": "Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely"
        }
      ],
      "title": "Microsoft Authenticator Elevation of Privilege Vulnerability"
    }
  ]
}