{
  "document": {
    "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-2023-21743 Microsoft SharePoint Server Security Feature Bypass Vulnerability - HTML",
        "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21743"
      },
      {
        "category": "self",
        "summary": "CVE-2023-21743 Microsoft SharePoint Server Security Feature Bypass Vulnerability - CSAF",
        "url": "https://msrc.microsoft.com/csaf/2023/msrc_cve-2023-21743.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 SharePoint Server Security Feature Bypass Vulnerability",
    "tracking": {
      "current_release_date": "2023-01-10T08:00:00.000Z",
      "generator": {
        "date": "2025-01-01T00:35:27.461Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2023-21743",
      "initial_release_date": "2023-01-10T08:00:00.000Z",
      "revision_history": [
        {
          "date": "2023-01-10T08:00:00.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c16.0.5378.1000",
            "product": {
              "name": "Microsoft SharePoint Enterprise Server 2016 \u003c16.0.5378.1000",
              "product_id": "3"
            }
          },
          {
            "category": "product_version",
            "name": "16.0.5378.1000",
            "product": {
              "name": "Microsoft SharePoint Enterprise Server 2016 16.0.5378.1000",
              "product_id": "10950"
            }
          }
        ],
        "category": "product_name",
        "name": "Microsoft SharePoint Enterprise Server 2016"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c16.0.10394.20021",
            "product": {
              "name": "Microsoft SharePoint Server 2019 \u003c16.0.10394.20021",
              "product_id": "2"
            }
          },
          {
            "category": "product_version",
            "name": "16.0.10394.20021",
            "product": {
              "name": "Microsoft SharePoint Server 2019 16.0.10394.20021",
              "product_id": "11585"
            }
          }
        ],
        "category": "product_name",
        "name": "Microsoft SharePoint Server 2019"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c16.0.15601.20418",
            "product": {
              "name": "Microsoft SharePoint Server Subscription Edition \u003c16.0.15601.20418",
              "product_id": "1"
            }
          },
          {
            "category": "product_version",
            "name": "16.0.15601.20418",
            "product": {
              "name": "Microsoft SharePoint Server Subscription Edition 16.0.15601.20418",
              "product_id": "11961"
            }
          }
        ],
        "category": "product_name",
        "name": "Microsoft SharePoint Server Subscription Edition"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2023-21743",
      "cwe": {
        "id": "CWE-306",
        "name": "Missing Authentication for Critical Function"
      },
      "notes": [
        {
          "category": "general",
          "text": "Microsoft",
          "title": "Assigning CNA"
        },
        {
          "category": "faq",
          "text": "Yes. Customers must also trigger a SharePoint upgrade action included in this update to protect their SharePoint farm. The upgrade action can be triggered by running the SharePoint Products Configuration Wizard, the Upgrade-SPFarm PowerShell cmdlet, or the \u0026quot;psconfig.exe -cmd upgrade -inplace b2b\u0026quot; command on each SharePoint server after installing the update.",
          "title": "Are any additional steps required to protect my SharePoint farm after installing the January 10, 2023 security update for SharePoint Server?"
        },
        {
          "category": "faq",
          "text": "In a network-based attack, an unauthenticated attacker could bypass authentication and make an anonymous connection.",
          "title": "How could an attacker exploit this vulnerability?"
        },
        {
          "category": "faq",
          "text": "An unauthenticated attacker is able to bypass the expected user access.",
          "title": "What kind of security feature could be bypassed by successfully exploiting this vulnerability?"
        }
      ],
      "product_status": {
        "fixed": [
          "10950",
          "11585",
          "11961"
        ],
        "known_affected": [
          "1",
          "2",
          "3"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2023-21743 Microsoft SharePoint Server Security Feature Bypass Vulnerability - HTML",
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21743"
        },
        {
          "category": "self",
          "summary": "CVE-2023-21743 Microsoft SharePoint Server Security Feature Bypass Vulnerability - CSAF",
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21743"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2023-01-10T08:00:00.000Z",
          "details": "16.0.5378.1000:Security Update:https://support.microsoft.com/help/5002338",
          "product_ids": [
            "3"
          ],
          "url": "https://support.microsoft.com/help/5002338"
        },
        {
          "category": "vendor_fix",
          "date": "2023-01-10T08:00:00.000Z",
          "details": "16.0.10394.20021:Security Update:https://support.microsoft.com/help/5002329",
          "product_ids": [
            "2"
          ],
          "url": "https://support.microsoft.com/help/5002329"
        },
        {
          "category": "vendor_fix",
          "date": "2023-01-10T08:00:00.000Z",
          "details": "16.0.15601.20418:Security Update:https://support.microsoft.com/help/5002331",
          "product_ids": [
            "1"
          ],
          "url": "https://support.microsoft.com/help/5002331"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "environmentalsScore": 0.0,
            "exploitCodeMaturity": "UNPROVEN",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "remediationLevel": "OFFICIAL_FIX",
            "reportConfidence": "CONFIRMED",
            "scope": "UNCHANGED",
            "temporalScore": 4.6,
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "1",
            "2",
            "3"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Security Feature Bypass"
        },
        {
          "category": "exploit_status",
          "details": "Exploited:No;Latest Software Release:Exploitation More Likely"
        }
      ],
      "title": "Microsoft SharePoint Server Security Feature Bypass Vulnerability"
    }
  ]
}