Vulnerability-Lookup

CNVD-2021-99641

Vulnerability from cnvd - Published: 2021-12-11

Title

Cisco Umbrella枚举漏洞

Description

Cisco Umbrella是美国思科（Cisco）公司的一套云安全平台。该平台能够预防网络钓鱼、恶意软件和勒索软件等网络威胁。 Cisco Umbrella存在枚举漏洞，该漏洞源于当系统中已经存在新地址时，当用户试图修改其电子邮件地址时，仪表板上出现一个过于描述性的错误消息。攻击者可利用该漏洞枚举系统中用户的电子邮件地址。

Severity

中

Patch Name

Cisco Umbrella枚举漏洞的补丁

Patch Description

Formal description

厂商已发布了漏洞修复程序，请及时关注更新： https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-umbrella-user-enum-S7XfJwDE

Reference

https://nvd.nist.gov/vuln/detail/CVE-2021-40126

Impacted products

Name
Cisco Umbrella

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-40126",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-40126"
    }
  },
  "description": "Cisco Umbrella\u662f\u7f8e\u56fd\u601d\u79d1\uff08Cisco\uff09\u516c\u53f8\u7684\u4e00\u5957\u4e91\u5b89\u5168\u5e73\u53f0\u3002\u8be5\u5e73\u53f0\u80fd\u591f\u9884\u9632\u7f51\u7edc\u9493\u9c7c\u3001\u6076\u610f\u8f6f\u4ef6\u548c\u52d2\u7d22\u8f6f\u4ef6\u7b49\u7f51\u7edc\u5a01\u80c1\u3002\n\nCisco Umbrella\u5b58\u5728\u679a\u4e3e\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5f53\u7cfb\u7edf\u4e2d\u5df2\u7ecf\u5b58\u5728\u65b0\u5730\u5740\u65f6\uff0c\u5f53\u7528\u6237\u8bd5\u56fe\u4fee\u6539\u5176\u7535\u5b50\u90ae\u4ef6\u5730\u5740\u65f6\uff0c\u4eea\u8868\u677f\u4e0a\u51fa\u73b0\u4e00\u4e2a\u8fc7\u4e8e\u63cf\u8ff0\u6027\u7684\u9519\u8bef\u6d88\u606f\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u679a\u4e3e\u7cfb\u7edf\u4e2d\u7528\u6237\u7684\u7535\u5b50\u90ae\u4ef6\u5730\u5740\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-umbrella-user-enum-S7XfJwDE",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-99641",
  "openTime": "2021-12-11",
  "patchDescription": "Cisco Umbrella\u662f\u7f8e\u56fd\u601d\u79d1\uff08Cisco\uff09\u516c\u53f8\u7684\u4e00\u5957\u4e91\u5b89\u5168\u5e73\u53f0\u3002\u8be5\u5e73\u53f0\u80fd\u591f\u9884\u9632\u7f51\u7edc\u9493\u9c7c\u3001\u6076\u610f\u8f6f\u4ef6\u548c\u52d2\u7d22\u8f6f\u4ef6\u7b49\u7f51\u7edc\u5a01\u80c1\u3002\r\n\r\nCisco Umbrella\u5b58\u5728\u679a\u4e3e\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5f53\u7cfb\u7edf\u4e2d\u5df2\u7ecf\u5b58\u5728\u65b0\u5730\u5740\u65f6\uff0c\u5f53\u7528\u6237\u8bd5\u56fe\u4fee\u6539\u5176\u7535\u5b50\u90ae\u4ef6\u5730\u5740\u65f6\uff0c\u4eea\u8868\u677f\u4e0a\u51fa\u73b0\u4e00\u4e2a\u8fc7\u4e8e\u63cf\u8ff0\u6027\u7684\u9519\u8bef\u6d88\u606f\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u679a\u4e3e\u7cfb\u7edf\u4e2d\u7528\u6237\u7684\u7535\u5b50\u90ae\u4ef6\u5730\u5740\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "Cisco Umbrella\u679a\u4e3e\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Cisco Umbrella"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2021-40126",
  "serverity": "\u4e2d",
  "submitTime": "2021-11-05",
  "title": "Cisco Umbrella\u679a\u4e3e\u6f0f\u6d1e"
}

CVE-2021-40126 (GCVE-0-2021-40126)

Vulnerability from cvelistv5 – Published: 2021-11-04 15:36 – Updated: 2024-11-07 21:42

Title

Cisco Umbrella Email Enumeration Vulnerability

Summary

A vulnerability in the web-based dashboard of Cisco Umbrella could allow an authenticated, remote attacker to perform an email enumeration attack against the Umbrella infrastructure. This vulnerability is due to an overly descriptive error message on the dashboard that appears when a user attempts to modify their email address when the new address already exists in the system. An attacker could exploit this vulnerability by attempting to modify the user's email address. A successful exploit could allow the attacker to enumerate email addresses of users in the system.

Severity

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-11-07 21:39 UTC

CWE

CWE-210

Assigner

cisco mitre root

References

1 reference

URL	Tags
https://tools.cisco.com/security/center/content/C…	vendor-advisoryx_refsource_CISCO

Impacted products

1 product

Vendor	Product	Version
Cisco	Cisco Umbrella Insights Virtual Appliance	Affected: n/a

Date Public

2021-11-03 00:00

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T02:27:31.480Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "20211103 Cisco Umbrella Email Enumeration Vulnerability",
            "tags": [
              "vendor-advisory",
              "x_refsource_CISCO",
              "x_transferred"
            ],
            "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-umbrella-user-enum-S7XfJwDE"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-40126",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-11-07T21:39:38.379898Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-11-07T21:42:55.636Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Cisco Umbrella Insights Virtual Appliance",
          "vendor": "Cisco",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "datePublic": "2021-11-03T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability in the web-based dashboard of Cisco Umbrella could allow an authenticated, remote attacker to perform an email enumeration attack against the Umbrella infrastructure. This vulnerability is due to an overly descriptive error message on the dashboard that appears when a user attempts to modify their email address when the new address already exists in the system. An attacker could exploit this vulnerability by attempting to modify the user\u0027s email address. A successful exploit could allow the attacker to enumerate email addresses of users in the system."
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "value": "The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-210",
              "description": "CWE-210",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-11-04T15:36:10.000Z",
        "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
        "shortName": "cisco"
      },
      "references": [
        {
          "name": "20211103 Cisco Umbrella Email Enumeration Vulnerability",
          "tags": [
            "vendor-advisory",
            "x_refsource_CISCO"
          ],
          "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-umbrella-user-enum-S7XfJwDE"
        }
      ],
      "source": {
        "advisory": "cisco-sa-umbrella-user-enum-S7XfJwDE",
        "defect": [
          [
            "CSCvz11942"
          ]
        ],
        "discovery": "INTERNAL"
      },
      "title": "Cisco Umbrella Email Enumeration Vulnerability",
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "psirt@cisco.com",
          "DATE_PUBLIC": "2021-11-03T16:00:00",
          "ID": "CVE-2021-40126",
          "STATE": "PUBLIC",
          "TITLE": "Cisco Umbrella Email Enumeration Vulnerability"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Cisco Umbrella Insights Virtual Appliance",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "Cisco"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "A vulnerability in the web-based dashboard of Cisco Umbrella could allow an authenticated, remote attacker to perform an email enumeration attack against the Umbrella infrastructure. This vulnerability is due to an overly descriptive error message on the dashboard that appears when a user attempts to modify their email address when the new address already exists in the system. An attacker could exploit this vulnerability by attempting to modify the user\u0027s email address. A successful exploit could allow the attacker to enumerate email addresses of users in the system."
            }
          ]
        },
        "exploit": [
          {
            "lang": "en",
            "value": "The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."
          }
        ],
        "impact": {
          "cvss": {
            "baseScore": "4.3",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
            "version": "3.0"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-210"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "20211103 Cisco Umbrella Email Enumeration Vulnerability",
              "refsource": "CISCO",
              "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-umbrella-user-enum-S7XfJwDE"
            }
          ]
        },
        "source": {
          "advisory": "cisco-sa-umbrella-user-enum-S7XfJwDE",
          "defect": [
            [
              "CSCvz11942"
            ]
          ],
          "discovery": "INTERNAL"
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
    "assignerShortName": "cisco",
    "cveId": "CVE-2021-40126",
    "datePublished": "2021-11-04T15:36:10.224Z",
    "dateReserved": "2021-08-25T00:00:00.000Z",
    "dateUpdated": "2024-11-07T21:42:55.636Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

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.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.