msrc_cve-2023-36439
Vulnerability from csaf_microsoft
Published
2023-11-14 08:00
Modified
2023-11-14 08:00
Summary
Microsoft Exchange Server Remote Code Execution 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.


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{
  "document": {
    "acknowledgments": [
      {
        "names": [
          "m4yfly with TianGong Team of Legendsec at Qi\u0026#39;anxin Group"
        ]
      }
    ],
    "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-2023-36439 Microsoft Exchange Server Remote Code Execution Vulnerability - HTML",
        "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36439"
      },
      {
        "category": "self",
        "summary": "CVE-2023-36439 Microsoft Exchange Server Remote Code Execution Vulnerability - CSAF",
        "url": "https://msrc.microsoft.com/csaf/2023/msrc_cve-2023-36439.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": "2023-11-14T08:00:00.000Z",
      "generator": {
        "date": "2025-01-01T02:15:45.201Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2023-36439",
      "initial_release_date": "2023-11-14T08:00:00.000Z",
      "revision_history": [
        {
          "date": "2023-11-14T08:00:00.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c15.01.2507.035",
            "product": {
              "name": "Microsoft Exchange Server 2016 Cumulative Update 23 \u003c15.01.2507.035",
              "product_id": "2"
            }
          },
          {
            "category": "product_version",
            "name": "15.01.2507.035",
            "product": {
              "name": "Microsoft Exchange Server 2016 Cumulative Update 23 15.01.2507.035",
              "product_id": "12039"
            }
          }
        ],
        "category": "product_name",
        "name": "Microsoft Exchange Server 2016 Cumulative Update 23"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c15.02.1258.028",
            "product": {
              "name": "Microsoft Exchange Server 2019 Cumulative Update 13 \u003c15.02.1258.028",
              "product_id": "1"
            }
          },
          {
            "category": "product_version",
            "name": "15.02.1258.028",
            "product": {
              "name": "Microsoft Exchange Server 2019 Cumulative Update 13 15.02.1258.028",
              "product_id": "12191"
            }
          }
        ],
        "category": "product_name",
        "name": "Microsoft Exchange Server 2019 Cumulative Update 13"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c15.02.1118.040",
            "product": {
              "name": "Microsoft Exchange Server 2019 Cumulative Update 12 \u003c15.02.1118.040",
              "product_id": "3"
            }
          },
          {
            "category": "product_version",
            "name": "15.02.1118.040",
            "product": {
              "name": "Microsoft Exchange Server 2019 Cumulative Update 12 15.02.1118.040",
              "product_id": "12038"
            }
          }
        ],
        "category": "product_name",
        "name": "Microsoft Exchange Server 2019 Cumulative Update 12"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2023-36439",
      "cwe": {
        "id": "CWE-502",
        "name": "Deserialization of Untrusted Data"
      },
      "notes": [
        {
          "category": "general",
          "text": "Microsoft",
          "title": "Assigning CNA"
        },
        {
          "category": "faq",
          "text": "For the vulnerability to be exploited, the attacker would need to be authenticated as a valid exchange user.",
          "title": "How could an attacker exploit this vulnerability?"
        },
        {
          "category": "faq",
          "text": "An authenticated attacker could gain remote code execution rights on the server mailbox backend as NT AUTHORITY\\SYSTEM.",
          "title": "What privileges could be gained by an attacker who successfully exploited the vulnerability?"
        },
        {
          "category": "faq",
          "text": "An authenticated attacker could exploit this vulnerability with LAN access.",
          "title": "According to the CVSS metric, the attack vector is adjacent (AV:A). What does that mean for this vulnerability?"
        },
        {
          "category": "faq",
          "text": "Yes. Customers running an affected version of Microsoft Exchange need to download the November 2023 Security Update and ensure the Serialized Data Signing feature is enabled to be protected from this vulnerability. Disabling certificate signing of Powershell serialization payloads makes your server vulnerable to known Exchange vulnerabilities and weakens protection against unknown threats. We recommend leaving this feature enabled.",
          "title": "Are there any more actions I need to take to be protected from this vulnerability?"
        }
      ],
      "product_status": {
        "fixed": [
          "12038",
          "12039",
          "12191"
        ],
        "known_affected": [
          "1",
          "2",
          "3"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2023-36439 Microsoft Exchange Server Remote Code Execution Vulnerability - HTML",
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36439"
        },
        {
          "category": "self",
          "summary": "CVE-2023-36439 Microsoft Exchange Server Remote Code Execution Vulnerability - CSAF",
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36439"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2023-11-14T08:00:00.000Z",
          "details": "15.01.2507.035:Security Update:https://support.microsoft.com/help/5032147",
          "product_ids": [
            "2"
          ],
          "url": "https://support.microsoft.com/help/5032147"
        },
        {
          "category": "vendor_fix",
          "date": "2023-11-14T08:00:00.000Z",
          "details": "15.02.1258.028:Security Update:https://support.microsoft.com/help/5032146",
          "product_ids": [
            "1"
          ],
          "url": "https://support.microsoft.com/help/5032146"
        },
        {
          "category": "vendor_fix",
          "date": "2023-11-14T08:00:00.000Z",
          "details": "15.02.1118.040:Security Update:https://support.microsoft.com/help/5032146",
          "product_ids": [
            "3"
          ],
          "url": "https://support.microsoft.com/help/5032146"
        }
      ],
      "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"
    }
  ]
}


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