{
  "document": {
    "acknowledgments": [
      {
        "names": [
          "\u003ca href=\"https://twitter.com/orange_8361\"\u003eOrange Tsai (@orange_8361)\u003c/a\u003e with \u003ca href=\"https://devco.re/\"\u003eDEVCORE\u003c/a\u003e"
        ]
      },
      {
        "names": [
          "\u003ca href=\"https://twitter.com/d1iv3\"\u003eTianze Ding (@D1iv3)\u003c/a\u003e with Tencent Security Xuanwu Lab"
        ]
      }
    ],
    "aggregate_severity": {
      "namespace": "https://www.microsoft.com/en-us/msrc/security-update-severity-rating-system",
      "text": "Critical"
    },
    "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-2022-24477 Microsoft Exchange Server Elevation of Privilege Vulnerability - HTML",
        "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-24477"
      },
      {
        "category": "self",
        "summary": "CVE-2022-24477 Microsoft Exchange Server Elevation of Privilege Vulnerability - CSAF",
        "url": "https://msrc.microsoft.com/csaf/2022/msrc_cve-2022-24477.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": "2023-12-04T08:00:00.000Z",
      "generator": {
        "date": "2025-01-02T19:33:43.174Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2022-24477",
      "initial_release_date": "2022-08-09T07:00:00.000Z",
      "revision_history": [
        {
          "date": "2022-08-09T07:00:00.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        },
        {
          "date": "2022-09-20T07:00:00.000Z",
          "legacy_version": "1.1",
          "number": "2",
          "summary": "Added an FAQ. This is an information change only."
        },
        {
          "date": "2022-10-11T07:00:00.000Z",
          "legacy_version": "2",
          "number": "3",
          "summary": "To address known issue of Outlook Probes not functioning properly with extended protection turned on, Microsoft has updated the Microsoft Exchange security updates. Please see the [Exchange Team Blog](https://techcommunity.microsoft.com/t5/exchange-team-blog/released-october-2022-exchange-server-security-updates/ba-p/3646263) for more information."
        },
        {
          "date": "2023-12-04T08:00:00.000Z",
          "legacy_version": "2.1",
          "number": "4",
          "summary": "Added an acknowledgement. This is an informational change only."
        }
      ],
      "status": "final",
      "version": "4"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c15.00.1497.042",
            "product": {
              "name": "Microsoft Exchange Server 2013 Cumulative Update 23 \u003c15.00.1497.042",
              "product_id": "5"
            }
          },
          {
            "category": "product_version",
            "name": "15.00.1497.042",
            "product": {
              "name": "Microsoft Exchange Server 2013 Cumulative Update 23 15.00.1497.042",
              "product_id": "11682"
            }
          }
        ],
        "category": "product_name",
        "name": "Microsoft Exchange Server 2013 Cumulative Update 23"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c15.01.2375.032",
            "product": {
              "name": "Microsoft Exchange Server 2016 Cumulative Update 22 \u003c15.01.2375.032",
              "product_id": "4"
            }
          },
          {
            "category": "product_version",
            "name": "15.01.2375.032",
            "product": {
              "name": "Microsoft Exchange Server 2016 Cumulative Update 22 15.01.2375.032",
              "product_id": "11956"
            }
          }
        ],
        "category": "product_name",
        "name": "Microsoft Exchange Server 2016 Cumulative Update 22"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c15.02.0986.030",
            "product": {
              "name": "Microsoft Exchange Server 2019 Cumulative Update 11 \u003c15.02.0986.030",
              "product_id": "3"
            }
          },
          {
            "category": "product_version",
            "name": "15.02.0986.030",
            "product": {
              "name": "Microsoft Exchange Server 2019 Cumulative Update 11 15.02.0986.030",
              "product_id": "11957"
            }
          }
        ],
        "category": "product_name",
        "name": "Microsoft Exchange Server 2019 Cumulative Update 11"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c15.02.1118.015",
            "product": {
              "name": "Microsoft Exchange Server 2019 Cumulative Update 12 \u003c15.02.1118.015",
              "product_id": "2"
            }
          },
          {
            "category": "product_version",
            "name": "15.02.1118.015",
            "product": {
              "name": "Microsoft Exchange Server 2019 Cumulative Update 12 15.02.1118.015",
              "product_id": "12038"
            }
          }
        ],
        "category": "product_name",
        "name": "Microsoft Exchange Server 2019 Cumulative Update 12"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c15.01.2507.013",
            "product": {
              "name": "Microsoft Exchange Server 2016 Cumulative Update 23 \u003c15.01.2507.013",
              "product_id": "1"
            }
          },
          {
            "category": "product_version",
            "name": "15.01.2507.013",
            "product": {
              "name": "Microsoft Exchange Server 2016 Cumulative Update 23 15.01.2507.013",
              "product_id": "12039"
            }
          }
        ],
        "category": "product_name",
        "name": "Microsoft Exchange Server 2016 Cumulative Update 23"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2022-24477",
      "notes": [
        {
          "category": "general",
          "text": "Microsoft",
          "title": "Assigning CNA"
        },
        {
          "category": "faq",
          "text": "Yes, the attacker must be authenticated.",
          "title": "According to the CVSS metric, privileges required is low (PR:L). Does the attacker need to be in an authenticated role on the Exchange Server?"
        },
        {
          "category": "faq",
          "text": "The attacker would be able to take over the mailboxes of all Exchange users, attackers can send emails, read emails, download attachments.",
          "title": "What privileges could be gained by an attacker who successfully exploited the vulnerability?"
        },
        {
          "category": "faq",
          "text": "Yes. Customers running an affected version of Microsoft Exchange need to enable Extended Protection to be protected from this vulnerability. For more information, see Exchange Server Support for Windows Extended Protection.\nFor more information on this issue, please see The Exchange Blog.",
          "title": "Are there any more actions I need to take to be protected from this vulnerability?"
        },
        {
          "category": "faq",
          "text": "This vulnerability requires that a user with an affected version of Exchange Server access a malicious server. An attacker would have to host a specially crafted server share or website. An attacker would have no way to force users to visit this specially crafted server share or website, but would have to convince them to visit the server share or website, typically by way of an enticement in an email or chat message.",
          "title": "According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do?"
        }
      ],
      "product_status": {
        "fixed": [
          "11682",
          "11956",
          "11957",
          "12038",
          "12039"
        ],
        "known_affected": [
          "1",
          "2",
          "3",
          "4",
          "5"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2022-24477 Microsoft Exchange Server Elevation of Privilege Vulnerability - HTML",
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-24477"
        },
        {
          "category": "self",
          "summary": "CVE-2022-24477 Microsoft Exchange Server Elevation of Privilege Vulnerability - CSAF",
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-24477"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2022-08-09T07:00:00.000Z",
          "details": "15.00.1497.042:Security Update:https://support.microsoft.com/help/5019076",
          "product_ids": [
            "5"
          ],
          "url": "https://support.microsoft.com/help/5019076"
        },
        {
          "category": "vendor_fix",
          "date": "2022-08-09T07:00:00.000Z",
          "details": "15.01.2375.032:Security Update:https://support.microsoft.com/help/5019077",
          "product_ids": [
            "4"
          ],
          "url": "https://support.microsoft.com/help/5019077"
        },
        {
          "category": "vendor_fix",
          "date": "2022-08-09T07:00:00.000Z",
          "details": "15.02.0986.030:Security Update:https://support.microsoft.com/help/5019077",
          "product_ids": [
            "3"
          ],
          "url": "https://support.microsoft.com/help/5019077"
        },
        {
          "category": "vendor_fix",
          "date": "2022-08-09T07:00:00.000Z",
          "details": "15.02.1118.015:Security Update:https://support.microsoft.com/help/5019077",
          "product_ids": [
            "2"
          ],
          "url": "https://support.microsoft.com/help/5019077"
        },
        {
          "category": "vendor_fix",
          "date": "2022-08-09T07:00:00.000Z",
          "details": "15.01.2507.013:Security Update:https://support.microsoft.com/help/5019077",
          "product_ids": [
            "1"
          ],
          "url": "https://support.microsoft.com/help/5019077"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.0,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "environmentalsScore": 0.0,
            "exploitCodeMaturity": "UNPROVEN",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "remediationLevel": "OFFICIAL_FIX",
            "reportConfidence": "CONFIRMED",
            "scope": "UNCHANGED",
            "temporalScore": 7.0,
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/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 More Likely;Older Software Release:Exploitation More Likely"
        }
      ],
      "title": "Microsoft Exchange Server Elevation of Privilege Vulnerability"
    }
  ]
}