fkie_cve-2021-34523
Vulnerability from fkie_nvd
Published
2021-07-14 18:15
Modified
2025-03-07 20:16
Severity ?
9.0 (Critical) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
Microsoft Exchange Server Elevation of Privilege Vulnerability
References
secure@microsoft.comhttp://packetstormsecurity.com/files/163895/Microsoft-Exchange-ProxyShell-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
secure@microsoft.comhttps://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34523Patch, Vendor Advisory
secure@microsoft.comhttps://www.zerodayinitiative.com/advisories/ZDI-21-822/Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/163895/Microsoft-Exchange-ProxyShell-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34523Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.zerodayinitiative.com/advisories/ZDI-21-822/Third Party Advisory, VDB Entry
Impacted products
Vendor Product Version
microsoft exchange_server 2013
microsoft exchange_server 2016
microsoft exchange_server 2016
microsoft exchange_server 2019
microsoft exchange_server 2019


To clipboard 

{
   cisaActionDue: "2021-11-17",
   cisaExploitAdd: "2021-11-03",
   cisaRequiredAction: "Apply updates per vendor instructions.",
   cisaVulnerabilityName: "Microsoft Exchange Server Privilege Escalation Vulnerability",
   configurations: [
      {
         nodes: [
            {
               cpeMatch: [
                  {
                     criteria: "cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_23:*:*:*:*:*:*",
                     matchCriteriaId: "DA166F2A-D83B-4D50-AD0B-668D813E0585",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_19:*:*:*:*:*:*",
                     matchCriteriaId: "28FCA0E8-7D27-4746-9731-91B834CA3E64",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_20:*:*:*:*:*:*",
                     matchCriteriaId: "19C1EE0C-B8DD-4B91-BE4B-1C42D72FB718",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_8:*:*:*:*:*:*",
                     matchCriteriaId: "44ECF39A-1DE1-4870-A494-06A53494338D",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_9:*:*:*:*:*:*",
                     matchCriteriaId: "71CDF29B-116B-4DE2-AFD0-B62477FF0AEB",
                     vulnerable: true,
                  },
               ],
               negate: false,
               operator: "OR",
            },
         ],
      },
   ],
   cveTags: [],
   descriptions: [
      {
         lang: "en",
         value: "Microsoft Exchange Server Elevation of Privilege Vulnerability",
      },
      {
         lang: "es",
         value: "Una vulnerabilidad de Elevación de Privilegios de Microsoft Exchange Server. Este ID de CVE es diferente de CVE-2021-33768, CVE-2021-34470",
      },
   ],
   id: "CVE-2021-34523",
   lastModified: "2025-03-07T20:16:42.750",
   metrics: {
      cvssMetricV2: [
         {
            acInsufInfo: false,
            baseSeverity: "HIGH",
            cvssData: {
               accessComplexity: "LOW",
               accessVector: "NETWORK",
               authentication: "NONE",
               availabilityImpact: "PARTIAL",
               baseScore: 7.5,
               confidentialityImpact: "PARTIAL",
               integrityImpact: "PARTIAL",
               vectorString: "AV:N/AC:L/Au:N/C:P/I:P/A:P",
               version: "2.0",
            },
            exploitabilityScore: 10,
            impactScore: 6.4,
            obtainAllPrivilege: false,
            obtainOtherPrivilege: false,
            obtainUserPrivilege: false,
            source: "nvd@nist.gov",
            type: "Primary",
            userInteractionRequired: false,
         },
      ],
      cvssMetricV31: [
         {
            cvssData: {
               attackComplexity: "LOW",
               attackVector: "LOCAL",
               availabilityImpact: "NONE",
               baseScore: 9,
               baseSeverity: "CRITICAL",
               confidentialityImpact: "HIGH",
               integrityImpact: "HIGH",
               privilegesRequired: "NONE",
               scope: "CHANGED",
               userInteraction: "NONE",
               vectorString: "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N",
               version: "3.1",
            },
            exploitabilityScore: 2.5,
            impactScore: 5.8,
            source: "secure@microsoft.com",
            type: "Secondary",
         },
         {
            cvssData: {
               attackComplexity: "LOW",
               attackVector: "NETWORK",
               availabilityImpact: "HIGH",
               baseScore: 9.8,
               baseSeverity: "CRITICAL",
               confidentialityImpact: "HIGH",
               integrityImpact: "HIGH",
               privilegesRequired: "NONE",
               scope: "UNCHANGED",
               userInteraction: "NONE",
               vectorString: "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
               version: "3.1",
            },
            exploitabilityScore: 3.9,
            impactScore: 5.9,
            source: "nvd@nist.gov",
            type: "Secondary",
         },
      ],
   },
   published: "2021-07-14T18:15:12.347",
   references: [
      {
         source: "secure@microsoft.com",
         tags: [
            "Exploit",
            "Third Party Advisory",
            "VDB Entry",
         ],
         url: "http://packetstormsecurity.com/files/163895/Microsoft-Exchange-ProxyShell-Remote-Code-Execution.html",
      },
      {
         source: "secure@microsoft.com",
         tags: [
            "Patch",
            "Vendor Advisory",
         ],
         url: "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34523",
      },
      {
         source: "secure@microsoft.com",
         tags: [
            "Third Party Advisory",
            "VDB Entry",
         ],
         url: "https://www.zerodayinitiative.com/advisories/ZDI-21-822/",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Exploit",
            "Third Party Advisory",
            "VDB Entry",
         ],
         url: "http://packetstormsecurity.com/files/163895/Microsoft-Exchange-ProxyShell-Remote-Code-Execution.html",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Patch",
            "Vendor Advisory",
         ],
         url: "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34523",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Third Party Advisory",
            "VDB Entry",
         ],
         url: "https://www.zerodayinitiative.com/advisories/ZDI-21-822/",
      },
   ],
   sourceIdentifier: "secure@microsoft.com",
   vulnStatus: "Analyzed",
   weaknesses: [
      {
         description: [
            {
               lang: "en",
               value: "NVD-CWE-noinfo",
            },
         ],
         source: "nvd@nist.gov",
         type: "Primary",
      },
   ],
}


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