{
  "document": {
    "acknowledgments": [
      {
        "names": [
          "Piotr Bazydlo (@chudypb) of Trend Micro Zero Day Initiative"
        ]
      }
    ],
    "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-2023-36745 Microsoft Exchange Server Remote Code Execution Vulnerability - HTML",
        "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36745"
      },
      {
        "category": "self",
        "summary": "CVE-2023-36745 Microsoft Exchange Server Remote Code Execution Vulnerability - CSAF",
        "url": "https://msrc.microsoft.com/csaf/2023/msrc_cve-2023-36745.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 Remote Code Execution Vulnerability",
    "tracking": {
      "current_release_date": "2023-09-12T07:00:00.000Z",
      "generator": {
        "date": "2025-01-01T02:04:05.613Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2023-36745",
      "initial_release_date": "2023-09-12T07:00:00.000Z",
      "revision_history": [
        {
          "date": "2023-09-12T07:00:00.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published. This CVE was addressed by updates that were released in August 2023, but the CVE was inadvertently omitted from the August 2023 Security Updates. Microsoft strongly recommends that customers running affected versions of Microsoft Exchange Server  install the August 2023 updates to be protected from this vulnerability."
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c15.02.1258.025",
            "product": {
              "name": "Microsoft Exchange Server 2019 Cumulative Update 13 \u003c15.02.1258.025",
              "product_id": "1"
            }
          },
          {
            "category": "product_version",
            "name": "15.02.1258.025",
            "product": {
              "name": "Microsoft Exchange Server 2019 Cumulative Update 13 15.02.1258.025",
              "product_id": "12191"
            }
          }
        ],
        "category": "product_name",
        "name": "Microsoft Exchange Server 2019 Cumulative Update 13"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c15.02.1118.037",
            "product": {
              "name": "Microsoft Exchange Server 2019 Cumulative Update 12 \u003c15.02.1118.037",
              "product_id": "3"
            }
          },
          {
            "category": "product_version",
            "name": "15.02.1118.037",
            "product": {
              "name": "Microsoft Exchange Server 2019 Cumulative Update 12 15.02.1118.037",
              "product_id": "12038"
            }
          }
        ],
        "category": "product_name",
        "name": "Microsoft Exchange Server 2019 Cumulative Update 12"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c15.01.2507.032",
            "product": {
              "name": "Microsoft Exchange Server 2016 Cumulative Update 23 \u003c15.01.2507.032",
              "product_id": "2"
            }
          },
          {
            "category": "product_version",
            "name": "15.01.2507.032",
            "product": {
              "name": "Microsoft Exchange Server 2016 Cumulative Update 23 15.01.2507.032",
              "product_id": "12039"
            }
          }
        ],
        "category": "product_name",
        "name": "Microsoft Exchange Server 2016 Cumulative Update 23"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2023-36745",
      "cwe": {
        "id": "CWE-502",
        "name": "Deserialization of Untrusted Data"
      },
      "notes": [
        {
          "category": "general",
          "text": "Microsoft",
          "title": "Assigning CNA"
        },
        {
          "category": "faq",
          "text": "Yes, the attacker must be authenticated with LAN-access and have credentials for a valid Exchange user.",
          "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": "An attacker who successfully exploits this vulnerability could perform a remote attack that could enable access to the victim\u0027s information and the ability to alter information. Successful exploitation could also potentially cause downtime for the targeted environment.",
          "title": "According to the CVSS metric, successful exploitation of this vulnerability could lead to total loss of confidentiality (C:H), integrity (I:H), and availability (A:H). What does that mean for this vulnerability?"
        },
        {
          "category": "faq",
          "text": "An attacker could exploit the vulnerability by leveraging the known (Type 4) UnitySerializationHolder gadget through a deserialization of untrusted data. Exploitation of this vulnerability requires that a user gain LAN-access as well as obtain credentials for a valid Exchange user.",
          "title": "How could an attacker exploit this vulnerability?"
        },
        {
          "category": "faq",
          "text": "Customers need to install the August 2023 Exchange security updates which are listed in the Security Updates table. Customers who have already August 2023 security updates are already protected from this vulnerability.\nYes, please see September 2023 release of new Exchange Server CVEs for more information.",
          "title": "What updates do I need to install to be protected from this vulnerability?"
        }
      ],
      "product_status": {
        "fixed": [
          "12038",
          "12039",
          "12191"
        ],
        "known_affected": [
          "1",
          "2",
          "3"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2023-36745 Microsoft Exchange Server Remote Code Execution Vulnerability - HTML",
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36745"
        },
        {
          "category": "self",
          "summary": "CVE-2023-36745 Microsoft Exchange Server Remote Code Execution Vulnerability - CSAF",
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36745"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2023-09-12T07:00:00.000Z",
          "details": "15.02.1258.025:Security Update:https://support.microsoft.com/help/5030524",
          "product_ids": [
            "1"
          ],
          "url": "https://support.microsoft.com/help/5030524"
        },
        {
          "category": "vendor_fix",
          "date": "2023-09-12T07:00:00.000Z",
          "details": "15.02.1118.037:Security Update:https://support.microsoft.com/help/5030524",
          "product_ids": [
            "3"
          ],
          "url": "https://support.microsoft.com/help/5030524"
        },
        {
          "category": "vendor_fix",
          "date": "2023-09-12T07:00:00.000Z",
          "details": "15.01.2507.032:Security Update:https://support.microsoft.com/help/5030524",
          "product_ids": [
            "2"
          ],
          "url": "https://support.microsoft.com/help/5030524"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT_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": "NONE",
            "vectorString": "CVSS:3.1/AV:A/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"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Remote Code Execution"
        },
        {
          "category": "exploit_status",
          "details": "Exploited:No;Latest Software Release:Exploitation More Likely"
        }
      ],
      "title": "Microsoft Exchange Server Remote Code Execution Vulnerability"
    }
  ]
}