Vulnerability-Lookup

CNVD-2021-70109

Vulnerability from cnvd - Published: 2021-09-10

Title

Nextcloud信息泄露漏洞（CNVD-2021-70109）

Description

Nextcloud是德国Nextcloud公司的一套开源的自托管文件同步和共享的通信应用平台。 Nextcloud Richdocuments存在信息泄露漏洞，该漏洞源于在受影响的版本中，Richdocuments OCS端点没有速率限制。这可能允许攻击者可利用该漏洞枚举潜在的有效共享令牌。建议将Nextcloud Richdocuments应用升级到3.8.4或4.2.1来解决。对于无法升级的用户，建议禁用Richdocuments应用程序。目前没有详细的漏洞细节提供。

Severity

高

Patch Name

Nextcloud信息泄露漏洞（CNVD-2021-70109）的补丁

Patch Description

Formal description

目前厂商已发布升级补丁以修复漏洞，补丁获取链接： https://github.com/nextcloud/security-advisories/security/advisories/GHSA-pxhh-954f-8w7w

Reference

https://nvd.nist.gov/vuln/detail/CVE-2021-37628

Impacted products

Name
Nextcloud Nextcloud

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-37628"
    }
  },
  "description": "Nextcloud\u662f\u5fb7\u56fdNextcloud\u516c\u53f8\u7684\u4e00\u5957\u5f00\u6e90\u7684\u81ea\u6258\u7ba1\u6587\u4ef6\u540c\u6b65\u548c\u5171\u4eab\u7684\u901a\u4fe1\u5e94\u7528\u5e73\u53f0\u3002\n\nNextcloud Richdocuments\u5b58\u5728\u4fe1\u606f\u6cc4\u9732\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5728\u53d7\u5f71\u54cd\u7684\u7248\u672c\u4e2d\uff0cRichdocuments OCS\u7aef\u70b9\u6ca1\u6709\u901f\u7387\u9650\u5236\u3002\u8fd9\u53ef\u80fd\u5141\u8bb8\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u679a\u4e3e\u6f5c\u5728\u7684\u6709\u6548\u5171\u4eab\u4ee4\u724c\u3002\u5efa\u8bae\u5c06Nextcloud Richdocuments\u5e94\u7528\u5347\u7ea7\u52303.8.4\u62164.2.1\u6765\u89e3\u51b3\u3002\u5bf9\u4e8e\u65e0\u6cd5\u5347\u7ea7\u7684\u7528\u6237\uff0c\u5efa\u8bae\u7981\u7528Richdocuments\u5e94\u7528\u7a0b\u5e8f\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u7684\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8865\u4e01\u83b7\u53d6\u94fe\u63a5\uff1a\r\nhttps://github.com/nextcloud/security-advisories/security/advisories/GHSA-pxhh-954f-8w7w",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-70109",
  "openTime": "2021-09-10",
  "patchDescription": "Nextcloud\u662f\u5fb7\u56fdNextcloud\u516c\u53f8\u7684\u4e00\u5957\u5f00\u6e90\u7684\u81ea\u6258\u7ba1\u6587\u4ef6\u540c\u6b65\u548c\u5171\u4eab\u7684\u901a\u4fe1\u5e94\u7528\u5e73\u53f0\u3002\r\n\r\nNextcloud Richdocuments\u5b58\u5728\u4fe1\u606f\u6cc4\u9732\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5728\u53d7\u5f71\u54cd\u7684\u7248\u672c\u4e2d\uff0cRichdocuments OCS\u7aef\u70b9\u6ca1\u6709\u901f\u7387\u9650\u5236\u3002\u8fd9\u53ef\u80fd\u5141\u8bb8\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u679a\u4e3e\u6f5c\u5728\u7684\u6709\u6548\u5171\u4eab\u4ee4\u724c\u3002\u5efa\u8bae\u5c06Nextcloud Richdocuments\u5e94\u7528\u5347\u7ea7\u52303.8.4\u62164.2.1\u6765\u89e3\u51b3\u3002\u5bf9\u4e8e\u65e0\u6cd5\u5347\u7ea7\u7684\u7528\u6237\uff0c\u5efa\u8bae\u7981\u7528Richdocuments\u5e94\u7528\u7a0b\u5e8f\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u7684\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\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": "Nextcloud\u4fe1\u606f\u6cc4\u9732\u6f0f\u6d1e\uff08CNVD-2021-70109\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Nextcloud Nextcloud"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2021-37628",
  "serverity": "\u9ad8",
  "submitTime": "2021-09-09",
  "title": "Nextcloud\u4fe1\u606f\u6cc4\u9732\u6f0f\u6d1e\uff08CNVD-2021-70109\uff09"
}

CVE-2021-37628 (GCVE-0-2021-37628)

Vulnerability from cvelistv5 – Published: 2021-09-07 20:15 – Updated: 2024-08-04 01:23

Title

File Drop can be bypassed using Richdocuments app in nextcloud

Summary

Nextcloud Richdocuments is an open source collaborative office suite. In affected versions the File Drop features ("Upload Only" public link shares in Nextcloud) can be bypassed using the Nextcloud Richdocuments app. An attacker was able to read arbitrary files in such a share. It is recommended that the Nextcloud Richdocuments is upgraded to 3.8.4 or 4.2.1. If upgrading is not possible then it is recommended to disable the Richdocuments application.

Severity

7.5 (High)


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

CWE

CWE-639 - Authorization Bypass Through User-Controlled Key

Assigner

GitHub_M mitre root

References

3 references

URL	Tags
https://github.com/nextcloud/security-advisories/…	x_refsource_CONFIRM
https://github.com/nextcloud/richdocuments/pull/1664	x_refsource_MISC
https://hackerone.com/reports/1253403	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
nextcloud	security-advisories	Affected: < 3.8.4 Affected: >= 4.0.0, < 4.2.1

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T01:23:01.253Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-pxhh-954f-8w7w"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/nextcloud/richdocuments/pull/1664"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://hackerone.com/reports/1253403"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "security-advisories",
          "vendor": "nextcloud",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 3.8.4"
            },
            {
              "status": "affected",
              "version": "\u003e= 4.0.0, \u003c 4.2.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Nextcloud Richdocuments is an open source collaborative office suite. In affected versions the File Drop features (\"Upload Only\" public link shares in Nextcloud) can be bypassed using the Nextcloud Richdocuments app. An attacker was able to read arbitrary files in such a share. It is recommended that the Nextcloud Richdocuments is upgraded to 3.8.4 or 4.2.1. If upgrading is not possible then it is recommended to disable the Richdocuments application."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-639",
              "description": "CWE-639: Authorization Bypass Through User-Controlled Key",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-09-07T20:15:11.000Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-pxhh-954f-8w7w"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/nextcloud/richdocuments/pull/1664"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://hackerone.com/reports/1253403"
        }
      ],
      "source": {
        "advisory": "GHSA-pxhh-954f-8w7w",
        "discovery": "UNKNOWN"
      },
      "title": "File Drop can be bypassed using Richdocuments app in nextcloud",
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "security-advisories@github.com",
          "ID": "CVE-2021-37628",
          "STATE": "PUBLIC",
          "TITLE": "File Drop can be bypassed using Richdocuments app in nextcloud"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "security-advisories",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "\u003c 3.8.4"
                          },
                          {
                            "version_value": "\u003e= 4.0.0, \u003c 4.2.1"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "nextcloud"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "Nextcloud Richdocuments is an open source collaborative office suite. In affected versions the File Drop features (\"Upload Only\" public link shares in Nextcloud) can be bypassed using the Nextcloud Richdocuments app. An attacker was able to read arbitrary files in such a share. It is recommended that the Nextcloud Richdocuments is upgraded to 3.8.4 or 4.2.1. If upgrading is not possible then it is recommended to disable the Richdocuments application."
            }
          ]
        },
        "impact": {
          "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-639: Authorization Bypass Through User-Controlled Key"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-pxhh-954f-8w7w",
              "refsource": "CONFIRM",
              "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-pxhh-954f-8w7w"
            },
            {
              "name": "https://github.com/nextcloud/richdocuments/pull/1664",
              "refsource": "MISC",
              "url": "https://github.com/nextcloud/richdocuments/pull/1664"
            },
            {
              "name": "https://hackerone.com/reports/1253403",
              "refsource": "MISC",
              "url": "https://hackerone.com/reports/1253403"
            }
          ]
        },
        "source": {
          "advisory": "GHSA-pxhh-954f-8w7w",
          "discovery": "UNKNOWN"
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2021-37628",
    "datePublished": "2021-09-07T20:15:11.000Z",
    "dateReserved": "2021-07-29T00:00:00.000Z",
    "dateUpdated": "2024-08-04T01:23:01.253Z",
    "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.

Action not permitted

CNVD-2021-70109

CVE-2021-37628 (GCVE-0-2021-37628)

Tags

Sightings

Nomenclature

Related by attack behaviour