msrc_cve-2023-35391
Vulnerability from csaf_microsoft
Published
2023-08-08 07:00
Modified
2023-10-17 07:00
Summary
ASP.NET Core SignalR and Visual Studio Information Disclosure 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.


To clipboard 

{
   document: {
      acknowledgments: [
         {
            names: [
               "Brennan Conroy",
            ],
         },
      ],
      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-2023-35391 ASP.NET Core SignalR and Visual Studio Information Disclosure Vulnerability - HTML",
            url: "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35391",
         },
         {
            category: "self",
            summary: "CVE-2023-35391 ASP.NET Core SignalR and Visual Studio Information Disclosure Vulnerability - CSAF",
            url: "https://msrc.microsoft.com/csaf/2023/msrc_cve-2023-35391.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: "ASP.NET Core SignalR and Visual Studio Information Disclosure Vulnerability",
      tracking: {
         current_release_date: "2023-10-17T07:00:00.000Z",
         generator: {
            date: "2025-01-01T01:58:31.448Z",
            engine: {
               name: "MSRC Generator",
               version: "1.0",
            },
         },
         id: "msrc_CVE-2023-35391",
         initial_release_date: "2023-08-08T07:00:00.000Z",
         revision_history: [
            {
               date: "2023-08-08T07:00:00.000Z",
               legacy_version: "1",
               number: "1",
               summary: "Information published.",
            },
            {
               date: "2023-10-17T07:00:00.000Z",
               legacy_version: "1.1",
               number: "2",
               summary: "Updated one or more CVSS scores for the affected products and added an FAQ explaining the vector string settings. This is an informational change only.",
            },
         ],
         status: "final",
         version: "2",
      },
   },
   product_tree: {
      branches: [
         {
            branches: [
               {
                  category: "product_version_range",
                  name: "<17.2.18",
                  product: {
                     name: "Microsoft Visual Studio 2022 version 17.2 <17.2.18",
                     product_id: "4",
                  },
               },
               {
                  category: "product_version",
                  name: "17.2.18",
                  product: {
                     name: "Microsoft Visual Studio 2022 version 17.2 17.2.18",
                     product_id: "12051",
                  },
               },
            ],
            category: "product_name",
            name: "Microsoft Visual Studio 2022 version 17.2",
         },
         {
            branches: [
               {
                  category: "product_version_range",
                  name: "<17.4.10",
                  product: {
                     name: "Microsoft Visual Studio 2022 version 17.4 <17.4.10",
                     product_id: "3",
                  },
               },
               {
                  category: "product_version",
                  name: "17.4.10",
                  product: {
                     name: "Microsoft Visual Studio 2022 version 17.4 17.4.10",
                     product_id: "12129",
                  },
               },
            ],
            category: "product_name",
            name: "Microsoft Visual Studio 2022 version 17.4",
         },
         {
            branches: [
               {
                  category: "product_version_range",
                  name: "<17.6.6",
                  product: {
                     name: "Microsoft Visual Studio 2022 version 17.6 <17.6.6",
                     product_id: "1",
                  },
               },
               {
                  category: "product_version",
                  name: "17.6.6",
                  product: {
                     name: "Microsoft Visual Studio 2022 version 17.6 17.6.6",
                     product_id: "12187",
                  },
               },
            ],
            category: "product_name",
            name: "Microsoft Visual Studio 2022 version 17.6",
         },
         {
            branches: [
               {
                  category: "product_version_range",
                  name: "<2.1.40",
                  product: {
                     name: "ASP.NET Core 2.1 <2.1.40",
                     product_id: "6",
                  },
               },
               {
                  category: "product_version",
                  name: "2.1.40",
                  product: {
                     name: "ASP.NET Core 2.1 2.1.40",
                     product_id: "11564",
                  },
               },
            ],
            category: "product_name",
            name: "ASP.NET Core 2.1",
         },
         {
            branches: [
               {
                  category: "product_version_range",
                  name: "<6.0.21",
                  product: {
                     name: ".NET 6.0 <6.0.21",
                     product_id: "5",
                  },
               },
               {
                  category: "product_version",
                  name: "6.0.21",
                  product: {
                     name: ".NET 6.0 6.0.21",
                     product_id: "12009",
                  },
               },
            ],
            category: "product_name",
            name: ".NET 6.0",
         },
         {
            branches: [
               {
                  category: "product_version_range",
                  name: "<7.0.10",
                  product: {
                     name: ".NET 7.0 <7.0.10",
                     product_id: "2",
                  },
               },
               {
                  category: "product_version",
                  name: "7.0.10",
                  product: {
                     name: ".NET 7.0 7.0.10",
                     product_id: "12130",
                  },
               },
            ],
            category: "product_name",
            name: ".NET 7.0",
         },
      ],
   },
   vulnerabilities: [
      {
         cve: "CVE-2023-35391",
         notes: [
            {
               category: "general",
               text: "Microsoft",
               title: "Assigning CNA",
            },
            {
               category: "faq",
               text: "This vulnerability makes it possible to listen to any group or user with a specially crafted group/username. By exploiting this vulnerability, the attacker can now receive messages for group(s) that they are unauthorized to view.",
               title: "What type of information could be disclosed by this vulnerability?",
            },
            {
               category: "faq",
               text: "The attack itself is carried out locally. For example, when the score indicates that the Attack Vector is Local (AV:L) and User Interaction is Required (UI:R), this could describe an exploit in which an attacker, through social engineering, convinces a victim to download and run a malicious application. This could lead to a local attack on the user's device which could leak data.",
               title: "According to the CVSS metric, the attack vector is local (AV:L). Why does the CVE title indicate that this is information disclosure?",
            },
         ],
         product_status: {
            fixed: [
               "11564",
               "12009",
               "12051",
               "12129",
               "12130",
               "12187",
            ],
            known_affected: [
               "1",
               "2",
               "3",
               "4",
               "5",
               "6",
            ],
         },
         references: [
            {
               category: "self",
               summary: "CVE-2023-35391 ASP.NET Core SignalR and Visual Studio Information Disclosure Vulnerability - HTML",
               url: "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35391",
            },
            {
               category: "self",
               summary: "CVE-2023-35391 ASP.NET Core SignalR and Visual Studio Information Disclosure Vulnerability - CSAF",
               url: "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35391",
            },
         ],
         remediations: [
            {
               category: "vendor_fix",
               date: "2023-08-08T07:00:00.000Z",
               details: "17.2.18:Security Update:https://docs.microsoft.com/en-us/visualstudio/releases/2022/release-notes",
               product_ids: [
                  "4",
               ],
               url: "https://docs.microsoft.com/en-us/visualstudio/releases/2022/release-notes",
            },
            {
               category: "vendor_fix",
               date: "2023-08-08T07:00:00.000Z",
               details: "17.4.10:Security Update:https://learn.microsoft.com/en-us/visualstudio/releases/2022/release-notes",
               product_ids: [
                  "3",
               ],
               url: "https://learn.microsoft.com/en-us/visualstudio/releases/2022/release-notes",
            },
            {
               category: "vendor_fix",
               date: "2023-08-08T07:00:00.000Z",
               details: "17.6.6:Security Update:https://learn.microsoft.com/en-us/visualstudio/releases/2022/release-notes",
               product_ids: [
                  "1",
               ],
               url: "https://learn.microsoft.com/en-us/visualstudio/releases/2022/release-notes",
            },
            {
               category: "vendor_fix",
               date: "2023-08-08T07:00:00.000Z",
               details: "2.1.40:Security Update:https://github.com/dotnet/announcements/issues/XXX",
               product_ids: [
                  "6",
               ],
               url: "https://github.com/dotnet/announcements/issues/XXX",
            },
            {
               category: "vendor_fix",
               date: "2023-08-08T07:00:00.000Z",
               details: "6.0.21:Security Update:https://support.microsoft.com/help/5029688",
               product_ids: [
                  "5",
               ],
               url: "https://support.microsoft.com/help/5029688",
            },
            {
               category: "vendor_fix",
               date: "2023-08-08T07:00:00.000Z",
               details: "7.0.10:Security Update:https://support.microsoft.com/help/5029689",
               product_ids: [
                  "2",
               ],
               url: "https://support.microsoft.com/help/5029689",
            },
         ],
         scores: [
            {
               cvss_v3: {
                  attackComplexity: "LOW",
                  attackVector: "LOCAL",
                  availabilityImpact: "NONE",
                  baseScore: 6.2,
                  baseSeverity: "MEDIUM",
                  confidentialityImpact: "HIGH",
                  environmentalsScore: 0,
                  exploitCodeMaturity: "PROOF_OF_CONCEPT",
                  integrityImpact: "NONE",
                  privilegesRequired: "NONE",
                  remediationLevel: "OFFICIAL_FIX",
                  reportConfidence: "CONFIRMED",
                  scope: "UNCHANGED",
                  temporalScore: 5.6,
                  userInteraction: "NONE",
                  vectorString: "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C",
                  version: "3.1",
               },
               products: [
                  "1",
                  "2",
                  "3",
                  "4",
                  "5",
                  "6",
               ],
            },
         ],
         threats: [
            {
               category: "impact",
               details: "Information Disclosure",
            },
            {
               category: "exploit_status",
               details: "Exploited:No;Latest Software Release:Exploitation Less Likely",
            },
         ],
         title: "ASP.NET Core SignalR and Visual Studio Information Disclosure Vulnerability",
      },
   ],
}


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