cve-2021-42321
Vulnerability from cvelistv5
Published
2021-11-10 00:47
Modified
2024-08-04 03:30
Summary
Microsoft Exchange Server Remote Code Execution Vulnerability
CISA Known exploited vulnerability
Data from the Known Exploited Vulnerabilities Catalog

Date added: 2021-11-17

Due date: 2021-12-01

Required action: Apply updates per vendor instructions.

Used in ransomware: Known

Notes: https://nvd.nist.gov/vuln/detail/CVE-2021-42321

Show details on NVD website


{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T03:30:38.363Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42321"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "http://packetstormsecurity.com/files/166153/Microsoft-Exchange-Server-Remote-Code-Execution.html"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "http://packetstormsecurity.com/files/168131/Microsoft-Exchange-Server-ChainedSerializationBinder-Remote-Code-Execution.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_21:*:*:*:*:*:*"
          ],
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Microsoft Exchange Server 2016 Cumulative Update 21",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "15.01.2308.020",
              "status": "affected",
              "version": "15.01.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_10:*:*:*:*:*:*"
          ],
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Microsoft Exchange Server 2019 Cumulative Update 10",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "15.02.0792.019",
              "status": "affected",
              "version": "15.02.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_22:*:*:*:*:*:*"
          ],
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Microsoft Exchange Server 2016 Cumulative Update 22",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "15.01.2375.017",
              "status": "affected",
              "version": "15.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_11:*:*:*:*:*:*"
          ],
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Microsoft Exchange Server 2019 Cumulative Update 11",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "15.02.0986.014",
              "status": "affected",
              "version": "15.02.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "datePublic": "2021-11-09T08:00:00+00:00",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Microsoft Exchange Server Remote Code Execution Vulnerability"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "Remote Code Execution",
              "lang": "en-US",
              "type": "Impact"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-05-29T14:47:48.107Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42321"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "http://packetstormsecurity.com/files/166153/Microsoft-Exchange-Server-Remote-Code-Execution.html"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "http://packetstormsecurity.com/files/168131/Microsoft-Exchange-Server-ChainedSerializationBinder-Remote-Code-Execution.html"
        }
      ],
      "title": "Microsoft Exchange Server Remote Code Execution Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2021-42321",
    "datePublished": "2021-11-10T00:47:43",
    "dateReserved": "2021-10-12T00:00:00",
    "dateUpdated": "2024-08-04T03:30:38.363Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "meta": {
    "cisa_known_exploited": {
      "cveID": "CVE-2021-42321",
      "cwes": "[\"CWE-184\", \"CWE-502\"]",
      "dateAdded": "2021-11-17",
      "dueDate": "2021-12-01",
      "knownRansomwareCampaignUse": "Known",
      "notes": "https://nvd.nist.gov/vuln/detail/CVE-2021-42321",
      "product": "Exchange",
      "requiredAction": "Apply updates per vendor instructions.",
      "shortDescription": "An authenticated attacker could leverage improper validation in cmdlet arguments within Microsoft Exchange and perform remote code execution.",
      "vendorProject": "Microsoft",
      "vulnerabilityName": "Microsoft Exchange Server Remote Code Execution Vulnerability"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-42321\",\"sourceIdentifier\":\"secure@microsoft.com\",\"published\":\"2021-11-10T01:19:50.047\",\"lastModified\":\"2024-07-24T17:07:18.663\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"cisaExploitAdd\":\"2021-11-17\",\"cisaActionDue\":\"2021-12-01\",\"cisaRequiredAction\":\"Apply updates per vendor instructions.\",\"cisaVulnerabilityName\":\"Microsoft Exchange Server Remote Code Execution Vulnerability\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"Microsoft Exchange Server Remote Code Execution Vulnerability\"},{\"lang\":\"es\",\"value\":\"Una vulnerabilidad de Ejecuci\u00f3n de C\u00f3digo Remota en Microsoft Exchange Server\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"secure@microsoft.com\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\",\"baseScore\":8.8,\"baseSeverity\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":5.9},{\"source\":\"nvd@nist.gov\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\",\"baseScore\":8.8,\"baseSeverity\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":5.9}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:L/Au:S/C:P/I:P/A:P\",\"accessVector\":\"NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"SINGLE\",\"confidentialityImpact\":\"PARTIAL\",\"integrityImpact\":\"PARTIAL\",\"availabilityImpact\":\"PARTIAL\",\"baseScore\":6.5},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":8.0,\"impactScore\":6.4,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-Other\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_21:*:*:*:*:*:*\",\"matchCriteriaId\":\"3BE427A4-B0C2-4064-8234-29426325C348\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_22:*:*:*:*:*:*\",\"matchCriteriaId\":\"449CE85B-E599-44D3-A7C1-5133F6A55E86\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_10:*:*:*:*:*:*\",\"matchCriteriaId\":\"B4185347-EEDD-4239-9AB3-410E2EC89D2A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_11:*:*:*:*:*:*\",\"matchCriteriaId\":\"435343A4-BF10-461A-ABF2-D511A5FBDA75\"}]}]}],\"references\":[{\"url\":\"http://packetstormsecurity.com/files/166153/Microsoft-Exchange-Server-Remote-Code-Execution.html\",\"source\":\"secure@microsoft.com\",\"tags\":[\"Exploit\",\"Third Party Advisory\",\"VDB Entry\"]},{\"url\":\"http://packetstormsecurity.com/files/168131/Microsoft-Exchange-Server-ChainedSerializationBinder-Remote-Code-Execution.html\",\"source\":\"secure@microsoft.com\",\"tags\":[\"Exploit\",\"Third Party Advisory\",\"VDB Entry\"]},{\"url\":\"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42321\",\"source\":\"secure@microsoft.com\",\"tags\":[\"Patch\",\"Vendor Advisory\"]}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading...

Loading...

Loading...

Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.