Vulnerability-Lookup

CNVD-2020-60466

Vulnerability from cnvd - Published: 2020-11-04

Title

BigBlueButton服务器端请求伪造漏洞

Description

BigBlueButton是BigBlueButton社区的一套开源的Web会议系统。 BigBlueButton 2.2.7之前版本存在服务器端请求伪造漏洞，该漏洞允许攻击者读取本地文件，并通过上传的Office文档进行SSRF攻击，该文档在ODF xlink字段中有一个精心设计的URL。

Severity

中

Patch Name

BigBlueButton服务器端请求伪造漏洞的补丁

Patch Description

BigBlueButton是BigBlueButton社区的一套开源的Web会议系统。 BigBlueButton 2.2.7之前版本存在服务器端请求伪造漏洞，该漏洞允许攻击者读取本地文件，并通过上传的Office文档进行SSRF攻击，该文档在ODF xlink字段中有一个精心设计的URL。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，详情请关注厂商主页： https://bigbluebutton.org/

Reference

https://packetstormsecurity.com/files/159667/BigBlueButton-2.2.25-File-Disclosure-Server-Side-Request-Forgery.html

Impacted products

Name
BigBlueButton BigBlueButton <2.2.7

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-25820",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2020-25820"
    }
  },
  "description": "BigBlueButton\u662fBigBlueButton\u793e\u533a\u7684\u4e00\u5957\u5f00\u6e90\u7684Web\u4f1a\u8bae\u7cfb\u7edf\u3002\n\nBigBlueButton 2.2.7\u4e4b\u524d\u7248\u672c\u5b58\u5728\u670d\u52a1\u5668\u7aef\u8bf7\u6c42\u4f2a\u9020\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u5141\u8bb8\u653b\u51fb\u8005\u8bfb\u53d6\u672c\u5730\u6587\u4ef6\uff0c\u5e76\u901a\u8fc7\u4e0a\u4f20\u7684Office\u6587\u6863\u8fdb\u884cSSRF\u653b\u51fb\uff0c\u8be5\u6587\u6863\u5728ODF xlink\u5b57\u6bb5\u4e2d\u6709\u4e00\u4e2a\u7cbe\u5fc3\u8bbe\u8ba1\u7684URL\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8be6\u60c5\u8bf7\u5173\u6ce8\u5382\u5546\u4e3b\u9875\uff1a\r\nhttps://bigbluebutton.org/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2020-60466",
  "openTime": "2020-11-04",
  "patchDescription": "BigBlueButton\u662fBigBlueButton\u793e\u533a\u7684\u4e00\u5957\u5f00\u6e90\u7684Web\u4f1a\u8bae\u7cfb\u7edf\u3002\r\n\r\nBigBlueButton 2.2.7\u4e4b\u524d\u7248\u672c\u5b58\u5728\u670d\u52a1\u5668\u7aef\u8bf7\u6c42\u4f2a\u9020\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u5141\u8bb8\u653b\u51fb\u8005\u8bfb\u53d6\u672c\u5730\u6587\u4ef6\uff0c\u5e76\u901a\u8fc7\u4e0a\u4f20\u7684Office\u6587\u6863\u8fdb\u884cSSRF\u653b\u51fb\uff0c\u8be5\u6587\u6863\u5728ODF xlink\u5b57\u6bb5\u4e2d\u6709\u4e00\u4e2a\u7cbe\u5fc3\u8bbe\u8ba1\u7684URL\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": "BigBlueButton\u670d\u52a1\u5668\u7aef\u8bf7\u6c42\u4f2a\u9020\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "BigBlueButton BigBlueButton \u003c2.2.7"
  },
  "referenceLink": "https://packetstormsecurity.com/files/159667/BigBlueButton-2.2.25-File-Disclosure-Server-Side-Request-Forgery.html",
  "serverity": "\u4e2d",
  "submitTime": "2020-10-23",
  "title": "BigBlueButton\u670d\u52a1\u5668\u7aef\u8bf7\u6c42\u4f2a\u9020\u6f0f\u6d1e"
}

CVE-2020-25820 (GCVE-0-2020-25820)

Vulnerability from cvelistv5 – Published: 2020-10-21 13:01 – Updated: 2024-08-04 15:40

Summary

BigBlueButton before 2.2.7 allows remote authenticated users to read local files and conduct SSRF attacks via an uploaded Office document that has a crafted URL in an ODF xlink field.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

5 references

URL	Tags
https://www.redteam-pentesting.de/advisories/rt-s…	x_refsource_MISC
https://www.golem.de/news/big-blue-button-das-gro…	x_refsource_MISC
http://packetstormsecurity.com/files/159667/BigBl…	x_refsource_MISC
https://github.com/bigbluebutton/bigbluebutton/co…	x_refsource_MISC
https://github.com/bigbluebutton/bigbluebutton/co…	x_refsource_MISC

Show details on NVD website

JSON

To clipboard

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            "url": "https://www.golem.de/news/big-blue-button-das-grosse-blaue-sicherheitsrisiko-2010-151610.html"
          },
          {
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            "url": "http://packetstormsecurity.com/files/159667/BigBlueButton-2.2.25-File-Disclosure-Server-Side-Request-Forgery.html"
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            "url": "https://github.com/bigbluebutton/bigbluebutton/commit/71fe1eac1e5bd73a2cd44bd79c001086b250e435"
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            "url": "https://github.com/bigbluebutton/bigbluebutton/compare/v2.2.26...v2.2.27"
          }
        ],
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          "lang": "en",
          "value": "BigBlueButton before 2.2.7 allows remote authenticated users to read local files and conduct SSRF attacks via an uploaded Office document that has a crafted URL in an ODF xlink field."
        }
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      "providerMetadata": {
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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.