MSRC_CVE-2023-36786

Vulnerability from csaf_microsoft - Published: 2023-10-10 07:00 - Updated: 2023-10-10 07:00
Summary
Skype for Business 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.

{
  "document": {
    "acknowledgments": [
      {
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          "Anonymous"
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    "aggregate_severity": {
      "namespace": "https://www.microsoft.com/en-us/msrc/security-update-severity-rating-system",
      "text": "Important"
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    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
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      "tlp": {
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    "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-2023-36786 Skype for Business Remote Code Execution Vulnerability - HTML",
        "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36786"
      },
      {
        "category": "self",
        "summary": "CVE-2023-36786 Skype for Business Remote Code Execution Vulnerability - CSAF",
        "url": "https://msrc.microsoft.com/csaf/advisories/2023/msrc_cve-2023-36786.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"
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      {
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        "summary": "Common Vulnerability Scoring System",
        "url": "https://www.first.org/cvss"
      }
    ],
    "title": "Skype for Business Remote Code Execution Vulnerability",
    "tracking": {
      "current_release_date": "2023-10-10T07:00:00.000Z",
      "generator": {
        "date": "2025-04-14T22:45:46.577Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2023-36786",
      "initial_release_date": "2023-10-10T07:00:00.000Z",
      "revision_history": [
        {
          "date": "2023-10-10T07:00:00.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c6.0.9319.869",
            "product": {
              "name": "Skype for Business Server 2015 CU13 \u003c6.0.9319.869",
              "product_id": "1"
            }
          },
          {
            "category": "product_version",
            "name": "6.0.9319.869",
            "product": {
              "name": "Skype for Business Server 2015 CU13 6.0.9319.869",
              "product_id": "12224"
            }
          }
        ],
        "category": "product_name",
        "name": "Skype for Business Server 2015 CU13"
      },
      {
        "branches": [
          {
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            "name": "\u003c7.0.246.530",
            "product": {
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              "product_id": "2"
            }
          },
          {
            "category": "product_version",
            "name": "7.0.246.530",
            "product": {
              "name": "Skype for Business Server 2019 CU7 7.0.246.530",
              "product_id": "12223"
            }
          }
        ],
        "category": "product_name",
        "name": "Skype for Business Server 2019 CU7"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2023-36786",
      "cwe": {
        "id": "CWE-36",
        "name": "Absolute Path Traversal"
      },
      "notes": [
        {
          "category": "general",
          "text": "Microsoft",
          "title": "Assigning CNA"
        },
        {
          "category": "faq",
          "text": "An attacker could exploit this path traversal vulnerability by leveraging the OcsPowershell endpoint within Skype for Business Server 2019 CU7 Hotfix 2 and Skype for Business Server 2015 CU13 Hotfix 1.\nExploitation of this vulnerability requires the authenticated remote user be granted either the CsVoiceAdministrator or CsServerAdministrator role in order to create arbitrary files on the server.\nThis exploit would allow the attacker to execute arbitrary code on the server.",
          "title": "How could an attacker exploit this vulnerability?"
        },
        {
          "category": "faq",
          "text": "Successful exploitation of this vulnerability requires the attacker or targeted user to be granted an administrative role in the Skype for Business Control Panel.\nTo help retain security and role-based access control integrity, add users to the groups that define what role the user performs in management of the Skype for Business Server deployment.",
          "title": "According to the CVSS metric, privileges required is high (PR:H). What does that mean for this vulnerability?"
        }
      ],
      "product_status": {
        "fixed": [
          "12223",
          "12224"
        ],
        "known_affected": [
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          "2"
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      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2023-36786 Skype for Business Remote Code Execution Vulnerability - HTML",
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36786"
        },
        {
          "category": "self",
          "summary": "CVE-2023-36786 Skype for Business Remote Code Execution Vulnerability - CSAF",
          "url": "https://msrc.microsoft.com/csaf/advisories/2023/msrc_cve-2023-36786.json"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2023-10-10T07:00:00.000Z",
          "details": "6.0.9319.869:Security Update:https://support.microsoft.com/help/3061064",
          "product_ids": [
            "1"
          ],
          "url": "https://support.microsoft.com/help/3061064"
        },
        {
          "category": "vendor_fix",
          "date": "2023-10-10T07:00:00.000Z",
          "details": "7.0.246.530:Security Update:https://support.microsoft.com/help/4470124",
          "product_ids": [
            "2"
          ],
          "url": "https://support.microsoft.com/help/4470124"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "environmentalsScore": 0.0,
            "exploitCodeMaturity": "UNPROVEN",
            "integrityImpact": "HIGH",
            "privilegesRequired": "HIGH",
            "remediationLevel": "OFFICIAL_FIX",
            "reportConfidence": "CONFIRMED",
            "scope": "UNCHANGED",
            "temporalScore": 6.3,
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
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            "2"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Remote Code Execution"
        },
        {
          "category": "exploit_status",
          "details": "Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely"
        }
      ],
      "title": "Skype for Business Remote Code Execution Vulnerability"
    }
  ]
}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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