msrc_cve-2023-21531
Vulnerability from csaf_microsoft
Published
2023-01-10 08:00
Modified
2023-07-21 07:00
Summary
Azure Service Fabric Container Elevation of Privilege 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": [
          "David Fiser of \u003ca href=\"https://www.zerodayinitiative.com/\"\u003eTrend Micro Zero Day Initiative\u003c/a\u003e (Project Nebula)"
        ]
      },
      {
        "names": [
          "Juho Nokela with M-Files \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-2023-21531 Azure Service Fabric Container Elevation of Privilege Vulnerability - HTML",
        "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21531"
      },
      {
        "category": "self",
        "summary": "CVE-2023-21531 Azure Service Fabric Container Elevation of Privilege Vulnerability - CSAF",
        "url": "https://msrc.microsoft.com/csaf/2023/msrc_cve-2023-21531.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": "Azure Service Fabric Container Elevation of Privilege Vulnerability",
    "tracking": {
      "current_release_date": "2023-07-21T07:00:00.000Z",
      "generator": {
        "date": "2025-01-01T00:35:27.415Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2023-21531",
      "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."
        },
        {
          "date": "2023-07-21T07:00:00.000Z",
          "legacy_version": "1.1",
          "number": "2",
          "summary": "Updated FAQ information. This is an informational change only."
        }
      ],
      "status": "final",
      "version": "2"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c8.2 CU8",
            "product": {
              "name": "Azure Service Fabric 8.2 \u003c8.2 CU8",
              "product_id": "3"
            }
          },
          {
            "category": "product_version",
            "name": "8.2 CU8",
            "product": {
              "name": "Azure Service Fabric 8.2 8.2 CU8",
              "product_id": "12124"
            }
          }
        ],
        "category": "product_name",
        "name": "Azure Service Fabric 8.2"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c9.0 CU5",
            "product": {
              "name": "Azure Service Fabric 9.0 for Linux \u003c9.0 CU5",
              "product_id": "2"
            }
          },
          {
            "category": "product_version",
            "name": "9.0 CU5",
            "product": {
              "name": "Azure Service Fabric 9.0 for Linux 9.0 CU5",
              "product_id": "12125"
            }
          }
        ],
        "category": "product_name",
        "name": "Azure Service Fabric 9.0 for Linux"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c9.1 CU1",
            "product": {
              "name": "Azure Service Fabric 9.1 \u003c9.1 CU1",
              "product_id": "1"
            }
          },
          {
            "category": "product_version",
            "name": "9.1 CU1",
            "product": {
              "name": "Azure Service Fabric 9.1 9.1 CU1",
              "product_id": "12126"
            }
          }
        ],
        "category": "product_name",
        "name": "Azure Service Fabric 9.1"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2023-21531",
      "cwe": {
        "id": "CWE-284",
        "name": "Improper Access Control"
      },
      "notes": [
        {
          "category": "general",
          "text": "Microsoft",
          "title": "Assigning CNA"
        },
        {
          "category": "faq",
          "text": "This vulnerability affects Azure Service Fabric clusters and standalone Service Fabric clusters orchestrated by Docker. Only users who implement the Docker app containers can be affected.",
          "title": "Which Azure service(s) does this affect?"
        },
        {
          "category": "faq",
          "text": "An attacker who successfully exploited this vulnerability could elevate their privileges and gain control over the Service Fabric cluster. This vulnerability does not allow the attacker to elevate privileges outside of the compromised cluster.",
          "title": "What privileges could be gained by an attacker who successfully exploited the vulnerability?"
        },
        {
          "category": "faq",
          "text": "Successful exploitation of this vulnerability requires an attacker to first compromise the Service Fabric container and for the targeted environment to be architected in a unique manner.",
          "title": "According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?"
        },
        {
          "category": "faq",
          "text": "Any authenticated attacker could trigger this vulnerability. It does not require admin or other elevated privileges.",
          "title": "According to the CVSS metric, privileges required is low (PR:L).  What does that mean for this vulnerability?"
        },
        {
          "category": "faq",
          "text": "To be protected from this vulnerability customers must perform the following actions:\nManually upgrade your Service Fabric Cluster runtime to the latest version(s) provided in 8.2 CU8, 9.0 CU5, or 9.1 CU1 as appropriate.  Guidance on how to perform an update can be found here: Upgrade the Service Fabric version that runs on your cluster.\n\nManually enable and configure the BlockAccessToWireServer feature flag on your Service Fabric Clusters.",
          "title": "How do I protect myself from this vulnerability?"
        },
        {
          "category": "faq",
          "text": "The Service Fabric versions listed below provide customers the ability to enable the BlockAccessToWireServer feature flag which will protect against this vulnerability. Customers without auto-update enabled must update their Service Fabric resources as appropriate.\nAzure Service Fabric 8.2 CU8: Azure Service Fabric 8.2 CU8, Windows: Windows, 8.2.1723.9590: 8.2.1723.9590, Azure Service Fabric 8.2 CU8: Azure Service Fabric 8.2 CU8, Ubuntu 18: Ubuntu 18, 8.2.1521.1: 8.2.1521.1, Azure Service Fabric 9.0 CU5: Azure Service Fabric 9.0 CU5, Ubuntu 18: Ubuntu 18, 9.0.1148.1: 9.0.1148.1, Azure Service Fabric 9.0 CU5: Azure Service Fabric 9.0 CU5, Ubuntu 20: Ubuntu 20, 9.0.1148.1: 9.0.1148.1, Azure Service Fabric 9.0 CU5: Azure Service Fabric 9.0 CU5, Windows: Windows, 9.0.1155.9590: 9.0.1155.9590, Azure Service Fabric 9.1 CU1: Azure Service Fabric 9.1 CU1, Ubuntu 18: Ubuntu 18, 9.1.1230.1: 9.1.1230.1, Azure Service Fabric 9.1 CU1: Azure Service Fabric 9.1 CU1, Ubuntu 20: Ubuntu 20, 9.1.1230.1: 9.1.1230.1, Azure Service Fabric 9.1 CU1: Azure Service Fabric 9.1 CU1, Windows: Windows, 9.1.1436.9590: 9.1.1436.9590",
          "title": "What Service Fabric versions are protected against this vulnerability?"
        }
      ],
      "product_status": {
        "fixed": [
          "12124",
          "12125",
          "12126"
        ],
        "known_affected": [
          "1",
          "2",
          "3"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2023-21531 Azure Service Fabric Container Elevation of Privilege Vulnerability - HTML",
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21531"
        },
        {
          "category": "self",
          "summary": "CVE-2023-21531 Azure Service Fabric Container Elevation of Privilege Vulnerability - CSAF",
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21531"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2023-01-10T08:00:00.000Z",
          "details": "8.2 CU8:Security Update:https://github.com/microsoft/service-fabric/tree/master/release_notes",
          "product_ids": [
            "3"
          ],
          "url": "https://github.com/microsoft/service-fabric/tree/master/release_notes"
        },
        {
          "category": "vendor_fix",
          "date": "2023-01-10T08:00:00.000Z",
          "details": "9.0 CU5:Security Update:https://github.com/microsoft/service-fabric/blob/master/release_notes/Service_Fabric_ReleaseNotes_90CU5.md",
          "product_ids": [
            "2"
          ],
          "url": "https://github.com/microsoft/service-fabric/blob/master/release_notes/Service_Fabric_ReleaseNotes_90CU5.md"
        },
        {
          "category": "vendor_fix",
          "date": "2023-01-10T08:00:00.000Z",
          "details": "9.1 CU1:Security Update:https://github.com/microsoft/service-fabric/blob/master/release_notes/Service_Fabric_ReleaseNotes_91CU1.md",
          "product_ids": [
            "1"
          ],
          "url": "https://github.com/microsoft/service-fabric/blob/master/release_notes/Service_Fabric_ReleaseNotes_91CU1.md"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.0,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "environmentalsScore": 0.0,
            "exploitCodeMaturity": "UNPROVEN",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "remediationLevel": "OFFICIAL_FIX",
            "reportConfidence": "CONFIRMED",
            "scope": "UNCHANGED",
            "temporalScore": 6.1,
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:H/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": "Elevation of Privilege"
        },
        {
          "category": "exploit_status",
          "details": "Exploited:No;Latest Software Release:Exploitation Less Likely"
        }
      ],
      "title": "Azure Service Fabric Container Elevation of Privilege Vulnerability"
    }
  ]
}


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