Vulnerability-Lookup

CNVD-2020-67236

Vulnerability from cnvd - Published: 2020-11-27

Title

Nextcloud信任管理问题漏洞

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 Social 0.4.0之前版本存在信任管理问题漏洞，该漏洞源于未能对外出连接的服务器证书进行验证，从而允许中间人攻击。目前没有详细漏洞细节提供。

Severity

中

Patch Name

Nextcloud信任管理问题漏洞的补丁

Patch 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 Social 0.4.0之前版本存在信任管理问题漏洞，该漏洞源于未能对外出连接的服务器证书进行验证，从而允许中间人攻击。目前没有详细漏洞细节提供。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

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://nextcloud.com/security/advisory/?id=NC-SA-2020-043

Reference

https://nvd.nist.gov/vuln/detail/CVE-2020-8279

Impacted products

Name
Nextcloud Nextcloud Social <0.4.0

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-8279",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2020-8279"
    }
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  "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 Social 0.4.0\u4e4b\u524d\u7248\u672c\u5b58\u5728\u4fe1\u4efb\u7ba1\u7406\u95ee\u9898\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u672a\u80fd\u5bf9\u5916\u51fa\u8fde\u63a5\u7684\u670d\u52a1\u5668\u8bc1\u4e66\u8fdb\u884c\u9a8c\u8bc1\uff0c\u4ece\u800c\u5141\u8bb8\u4e2d\u95f4\u4eba\u653b\u51fb\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\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://nextcloud.com/security/advisory/?id=NC-SA-2020-043",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2020-67236",
  "openTime": "2020-11-27",
  "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 Social 0.4.0\u4e4b\u524d\u7248\u672c\u5b58\u5728\u4fe1\u4efb\u7ba1\u7406\u95ee\u9898\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u672a\u80fd\u5bf9\u5916\u51fa\u8fde\u63a5\u7684\u670d\u52a1\u5668\u8bc1\u4e66\u8fdb\u884c\u9a8c\u8bc1\uff0c\u4ece\u800c\u5141\u8bb8\u4e2d\u95f4\u4eba\u653b\u51fb\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\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\u4efb\u7ba1\u7406\u95ee\u9898\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Nextcloud Nextcloud Social \u003c0.4.0"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-8279",
  "serverity": "\u4e2d",
  "submitTime": "2020-11-24",
  "title": "Nextcloud\u4fe1\u4efb\u7ba1\u7406\u95ee\u9898\u6f0f\u6d1e"
}

CVE-2020-8279 (GCVE-0-2020-8279)

Vulnerability from cvelistv5 – Published: 2020-11-19 00:32 – Updated: 2024-08-04 09:56

Summary

Missing validation of server certificates for out-going connections in Nextcloud Social < 0.4.0 allowed a man-in-the-middle attack.

Severity

No CVSS data available.

CWE

CWE-295 - Improper Certificate Validation (CWE-295)

Assigner

hackerone mitre root

References

2 references

URL	Tags
https://hackerone.com/reports/915585	x_refsource_MISC
https://nextcloud.com/security/advisory/?id=NC-SA…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
n/a	Nextcloud Social	Affected: Affects <0.4.0 Affected: Fixed in 0.4.0

Show details on NVD website

JSON

To clipboard

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    "adp": [
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          "dateUpdated": "2024-08-04T09:56:28.267Z",
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              "x_transferred"
            ],
            "url": "https://nextcloud.com/security/advisory/?id=NC-SA-2020-043"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Nextcloud Social",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "Affects \u003c0.4.0"
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            }
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      "providerMetadata": {
        "dateUpdated": "2020-11-19T00:32:22.000Z",
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          ],
          "url": "https://hackerone.com/reports/915585"
        },
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          ],
          "url": "https://nextcloud.com/security/advisory/?id=NC-SA-2020-043"
        }
      ],
      "x_legacyV4Record": {
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          "ASSIGNER": "support@hackerone.com",
          "ID": "CVE-2020-8279",
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            "vendor_data": [
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    "state": "PUBLISHED"
  },
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}

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.