{
  "document": {
    "acknowledgments": [
      {
        "names": [
          "Johannes Diebold \u003chttps://www.linkedin.com/in/johannes-d-972898164/\u003e"
        ]
      },
      {
        "names": [
          "Benjamin Schiele with \u003ca href=\"https://hartmann.info/\"\u003ePaul Hartmann AG\u003c/a\u003e"
        ]
      }
    ],
    "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-2023-38163 Windows Defender Attack Surface Reduction Security Feature Bypass - HTML",
        "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-38163"
      },
      {
        "category": "self",
        "summary": "CVE-2023-38163 Windows Defender Attack Surface Reduction Security Feature Bypass - CSAF",
        "url": "https://msrc.microsoft.com/csaf/2023/msrc_cve-2023-38163.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": "Windows Defender Attack Surface Reduction Security Feature Bypass",
    "tracking": {
      "current_release_date": "2023-09-12T07:00:00.000Z",
      "generator": {
        "date": "2025-01-01T02:04:05.648Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2023-38163",
      "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."
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c1.391.1332.0",
            "product": {
              "name": "Microsoft Defender Security Intelligence Updates \u003c1.391.1332.0",
              "product_id": "1"
            }
          },
          {
            "category": "product_version",
            "name": "1.391.1332.0",
            "product": {
              "name": "Microsoft Defender Security Intelligence Updates 1.391.1332.0",
              "product_id": "12162"
            }
          }
        ],
        "category": "product_name",
        "name": "Microsoft Defender Security Intelligence Updates"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2023-38163",
      "notes": [
        {
          "category": "general",
          "text": "Microsoft",
          "title": "Assigning CNA"
        },
        {
          "category": "faq",
          "text": "This vulnerability existed in the Defender Security Intelligence Updates and not the Malware protection engine.  The version of the signatures that addressed the vulnerability is 1.391.1332.0 and was updated automatically. Check the current version in Windows Update history Definition Updates to see the most recently installed definitions.",
          "title": "How can I check if I\u0027m protected from this vulnerability?"
        },
        {
          "category": "faq",
          "text": "An attacker who successfully exploited this vulnerability could bypass the Windows Defender Attack Surface Reduction blocking feature.",
          "title": "What kind of security feature could be bypassed by successfully exploiting this vulnerability?"
        },
        {
          "category": "faq",
          "text": "The attack itself is carried out locally. For example, when the score indicates that the Attack Vector is Local and User Interaction is Required, this could describe an exploit in which an attacker, through social engineering, convinces a victim to click on a local file path link or download and run a malicious application or file.",
          "title": "According to the CVSS metric, the attack vector is local (AV:L) and user interaction is required (UI:R), what does that mean for this vulnerability?"
        }
      ],
      "product_status": {
        "fixed": [
          "12162"
        ],
        "known_affected": [
          "1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2023-38163 Windows Defender Attack Surface Reduction Security Feature Bypass - HTML",
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-38163"
        },
        {
          "category": "self",
          "summary": "CVE-2023-38163 Windows Defender Attack Surface Reduction Security Feature Bypass - CSAF",
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-38163"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2023-09-12T07:00:00.000Z",
          "details": "1.391.1332.0:Security Update:https://learn.microsoft.com/en-us/microsoft-365/security/defender-endpoint/manage-updates-baselines-microsoft-defender-antivirus?view=o365-worldwide#security-intelligence-updates",
          "product_ids": [
            "1"
          ],
          "url": "https://learn.microsoft.com/en-us/microsoft-365/security/defender-endpoint/manage-updates-baselines-microsoft-defender-antivirus?view=o365-worldwide#security-intelligence-updates"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "environmentalsScore": 0.0,
            "exploitCodeMaturity": "UNPROVEN",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "remediationLevel": "OFFICIAL_FIX",
            "reportConfidence": "CONFIRMED",
            "scope": "UNCHANGED",
            "temporalScore": 6.8,
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "1"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Security Feature Bypass"
        },
        {
          "category": "exploit_status",
          "details": "Exploited:No;Latest Software Release:Exploitation Less Likely"
        }
      ],
      "title": "Windows Defender Attack Surface Reduction Security Feature Bypass"
    }
  ]
}