{
  "document": {
    "acknowledgments": [
      {
        "names": [
          "Joonas Tuomisto of Fujitsu Finland"
        ]
      }
    ],
    "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-2022-21978 Microsoft Exchange Server Elevation of Privilege Vulnerability - HTML",
        "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-21978"
      },
      {
        "category": "self",
        "summary": "CVE-2022-21978 Microsoft Exchange Server Elevation of Privilege Vulnerability - CSAF",
        "url": "https://msrc.microsoft.com/csaf/2022/msrc_cve-2022-21978.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 Exchange Server Elevation of Privilege Vulnerability",
    "tracking": {
      "current_release_date": "2022-05-10T07:00:00.000Z",
      "generator": {
        "date": "2025-01-02T18:57:44.983Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2022-21978",
      "initial_release_date": "2022-05-10T08:00:00.000Z",
      "revision_history": [
        {
          "date": "2022-05-10T07:00:00.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c15.01.2375.028",
            "product": {
              "name": "Microsoft Exchange Server 2016 Cumulative Update 22 \u003c15.01.2375.028",
              "product_id": "4"
            }
          },
          {
            "category": "product_version",
            "name": "15.01.2375.028",
            "product": {
              "name": "Microsoft Exchange Server 2016 Cumulative Update 22 15.01.2375.028",
              "product_id": "11956"
            }
          }
        ],
        "category": "product_name",
        "name": "Microsoft Exchange Server 2016 Cumulative Update 22"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c15.02.0986.026",
            "product": {
              "name": "Microsoft Exchange Server 2019 Cumulative Update 11 \u003c15.02.0986.026",
              "product_id": "3"
            }
          },
          {
            "category": "product_version",
            "name": "15.02.0986.026",
            "product": {
              "name": "Microsoft Exchange Server 2019 Cumulative Update 11 15.02.0986.026",
              "product_id": "11957"
            }
          }
        ],
        "category": "product_name",
        "name": "Microsoft Exchange Server 2019 Cumulative Update 11"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c15.00.1497.36",
            "product": {
              "name": "Microsoft Exchange Server 2013 Cumulative Update 23 \u003c15.00.1497.36",
              "product_id": "5"
            }
          },
          {
            "category": "product_version",
            "name": "15.00.1497.36",
            "product": {
              "name": "Microsoft Exchange Server 2013 Cumulative Update 23 15.00.1497.36",
              "product_id": "11682"
            }
          }
        ],
        "category": "product_name",
        "name": "Microsoft Exchange Server 2013 Cumulative Update 23"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c15.01.2507.009",
            "product": {
              "name": "Microsoft Exchange Server 2016 Cumulative Update 23 \u003c15.01.2507.009",
              "product_id": "1"
            }
          },
          {
            "category": "product_version",
            "name": "15.01.2507.009",
            "product": {
              "name": "Microsoft Exchange Server 2016 Cumulative Update 23 15.01.2507.009",
              "product_id": "12039"
            }
          }
        ],
        "category": "product_name",
        "name": "Microsoft Exchange Server 2016 Cumulative Update 23"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c15.02.1118.009",
            "product": {
              "name": "Microsoft Exchange Server 2019 Cumulative Update 12 \u003c15.02.1118.009",
              "product_id": "2"
            }
          },
          {
            "category": "product_version",
            "name": "15.02.1118.009",
            "product": {
              "name": "Microsoft Exchange Server 2019 Cumulative Update 12 15.02.1118.009",
              "product_id": "12038"
            }
          }
        ],
        "category": "product_name",
        "name": "Microsoft Exchange Server 2019 Cumulative Update 12"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2022-21978",
      "notes": [
        {
          "category": "general",
          "text": "Microsoft",
          "title": "Assigning CNA"
        },
        {
          "category": "faq",
          "text": "Because of additional security hardening work for CVE-2022-21978, the following actions should be taken in addition to application of May 2022 security updates:\nFor customers that have Exchange Server 2016 CU22 or CU23, or Exchange Server 2019 CU11 or CU12 installed\nInstall the May 2022 SU first and then run one of the following commands using Setup.exe in your Exchange Server installation path (e.g., \u2026\\Program Files\\Microsoft\\Exchange Server\\v15\\Bin):\nSetup.exe /IAcceptExchangeServerLicenseTerms_DiagnosticDataON /PrepareAllDomains, Setup.exe /IAcceptExchangeServerLicenseTerms_DiagnosticDataOFF /PrepareAllDomains\nFor customers that have Exchange Server 2013 CU23 installed:\nInstall the May 2022 SU first and then run the following command using Setup.exe in your Exchange Server installation path (e.g., \u2026\\Program Files\\Microsoft\\Exchange Server\\v15\\Bin):\nSetup.exe /IAcceptExchangeServerLicenseTerms /PrepareAllDomains\nFor customers that have any older version of Exchange Server not listed above:\nUpdate your Exchange server to the latest CU, install May 2022 SU and then follow the steps above.\nPlease see New Exchange Server Security Update and Hotfix Packaging for more information",
          "title": "Do I need to take further steps to be protected from this vulnerability?"
        },
        {
          "category": "faq",
          "text": "Successful exploitation of this vulnerability requires the attacker to be authenticated to the Exchange Server as a member of a high privileged group.",
          "title": "According to the CVSS metric, privileges required is high (PR:H). What privileges does an attacker require to exploit this vulnerability?"
        },
        {
          "category": "faq",
          "text": "In this case, an attacker with elevated privileges on the Exchange server could gain the rights of a Domain Administrator. This could allow access and controls outside of the expected scope of the targeted functionality.",
          "title": "According to the CVSS metric, a successful exploitation could lead to a scope change (S:C). What does this mean for this vulnerability?"
        }
      ],
      "product_status": {
        "fixed": [
          "11682",
          "11956",
          "11957",
          "12038",
          "12039"
        ],
        "known_affected": [
          "1",
          "2",
          "3",
          "4",
          "5"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2022-21978 Microsoft Exchange Server Elevation of Privilege Vulnerability - HTML",
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-21978"
        },
        {
          "category": "self",
          "summary": "CVE-2022-21978 Microsoft Exchange Server Elevation of Privilege Vulnerability - CSAF",
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-21978"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2022-05-10T07:00:00.000Z",
          "details": "15.01.2375.028:Security Update:https://support.microsoft.com/help/5014261",
          "product_ids": [
            "4"
          ],
          "url": "https://support.microsoft.com/help/5014261"
        },
        {
          "category": "vendor_fix",
          "date": "2022-05-10T07:00:00.000Z",
          "details": "15.02.0986.026:Security Update:https://support.microsoft.com/help/5014261",
          "product_ids": [
            "3"
          ],
          "url": "https://support.microsoft.com/help/5014261"
        },
        {
          "category": "vendor_fix",
          "date": "2022-05-10T07:00:00.000Z",
          "details": "15.00.1497.36:Security Update:https://support.microsoft.com/help/5014260",
          "product_ids": [
            "5"
          ],
          "url": "https://support.microsoft.com/help/5014260"
        },
        {
          "category": "vendor_fix",
          "date": "2022-05-10T07:00:00.000Z",
          "details": "15.01.2507.009:Security Update:https://support.microsoft.com/help/5014261",
          "product_ids": [
            "1"
          ],
          "url": "https://support.microsoft.com/help/5014261"
        },
        {
          "category": "vendor_fix",
          "date": "2022-05-10T07:00:00.000Z",
          "details": "15.02.1118.009:Security Update:https://support.microsoft.com/help/5014261",
          "product_ids": [
            "2"
          ],
          "url": "https://support.microsoft.com/help/5014261"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 8.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "environmentalsScore": 0.0,
            "exploitCodeMaturity": "UNPROVEN",
            "integrityImpact": "HIGH",
            "privilegesRequired": "HIGH",
            "remediationLevel": "OFFICIAL_FIX",
            "reportConfidence": "CONFIRMED",
            "scope": "CHANGED",
            "temporalScore": 7.1,
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "1",
            "2",
            "3",
            "4",
            "5"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Elevation of Privilege"
        },
        {
          "category": "exploit_status",
          "details": "Exploited:No;Latest Software Release:Exploitation Less Likely;Older Software Release:Exploitation Less Likely"
        }
      ],
      "title": "Microsoft Exchange Server Elevation of Privilege Vulnerability"
    }
  ]
}