Vulnerability-Lookup

CNVD-2021-35232

Vulnerability from cnvd - Published: 2021-05-18

Title

MediaWiki代码问题漏洞（CNVD-2021-35232）

Description

MediaWiki是美国维基媒体（MediaWiki）基金会的一套自由免费的基于网络的Wiki引擎。该产品可用于部署内部的知识管理和内容管理系统。 MediaWiki 1.35.2版本及之前版本存在代码问题漏洞，该漏洞源于可以将带有尾随空格的MediaWiki用户名存储在cu_log数据库表中，攻击者可利用该漏洞对某些CheckUser扩展页面和功能进行拒绝服务。例如，攻击者可能会关闭Special：CheckUserLog，从而干扰使用情况跟踪。

Severity

中

Patch Name

MediaWiki代码问题漏洞（CNVD-2021-35232）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://phabricator.wikimedia.org/T275669

Reference

https://nvd.nist.gov/vuln/detail/CVE-2021-31553

Impacted products

Name
MediaWiki MediaWiki <=1.35.2

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-31553",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-31553"
    }
  },
  "description": "MediaWiki\u662f\u7f8e\u56fd\u7ef4\u57fa\u5a92\u4f53\uff08MediaWiki\uff09\u57fa\u91d1\u4f1a\u7684\u4e00\u5957\u81ea\u7531\u514d\u8d39\u7684\u57fa\u4e8e\u7f51\u7edc\u7684Wiki\u5f15\u64ce\u3002\u8be5\u4ea7\u54c1\u53ef\u7528\u4e8e\u90e8\u7f72\u5185\u90e8\u7684\u77e5\u8bc6\u7ba1\u7406\u548c\u5185\u5bb9\u7ba1\u7406\u7cfb\u7edf\u3002\n\nMediaWiki 1.35.2\u7248\u672c\u53ca\u4e4b\u524d\u7248\u672c\u5b58\u5728\u4ee3\u7801\u95ee\u9898\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u53ef\u4ee5\u5c06\u5e26\u6709\u5c3e\u968f\u7a7a\u683c\u7684MediaWiki\u7528\u6237\u540d\u5b58\u50a8\u5728cu_log\u6570\u636e\u5e93\u8868\u4e2d\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bf9\u67d0\u4e9bCheckUser\u6269\u5c55\u9875\u9762\u548c\u529f\u80fd\u8fdb\u884c\u62d2\u7edd\u670d\u52a1\u3002\u4f8b\u5982\uff0c\u653b\u51fb\u8005\u53ef\u80fd\u4f1a\u5173\u95edSpecial\uff1aCheckUserLog\uff0c\u4ece\u800c\u5e72\u6270\u4f7f\u7528\u60c5\u51b5\u8ddf\u8e2a\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\uff1ahttps://phabricator.wikimedia.org/T275669",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-35232",
  "openTime": "2021-05-18",
  "patchDescription": "MediaWiki\u662f\u7f8e\u56fd\u7ef4\u57fa\u5a92\u4f53\uff08MediaWiki\uff09\u57fa\u91d1\u4f1a\u7684\u4e00\u5957\u81ea\u7531\u514d\u8d39\u7684\u57fa\u4e8e\u7f51\u7edc\u7684Wiki\u5f15\u64ce\u3002\u8be5\u4ea7\u54c1\u53ef\u7528\u4e8e\u90e8\u7f72\u5185\u90e8\u7684\u77e5\u8bc6\u7ba1\u7406\u548c\u5185\u5bb9\u7ba1\u7406\u7cfb\u7edf\u3002\r\n\r\nMediaWiki 1.35.2\u7248\u672c\u53ca\u4e4b\u524d\u7248\u672c\u5b58\u5728\u4ee3\u7801\u95ee\u9898\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u53ef\u4ee5\u5c06\u5e26\u6709\u5c3e\u968f\u7a7a\u683c\u7684MediaWiki\u7528\u6237\u540d\u5b58\u50a8\u5728cu_log\u6570\u636e\u5e93\u8868\u4e2d\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bf9\u67d0\u4e9bCheckUser\u6269\u5c55\u9875\u9762\u548c\u529f\u80fd\u8fdb\u884c\u62d2\u7edd\u670d\u52a1\u3002\u4f8b\u5982\uff0c\u653b\u51fb\u8005\u53ef\u80fd\u4f1a\u5173\u95edSpecial\uff1aCheckUserLog\uff0c\u4ece\u800c\u5e72\u6270\u4f7f\u7528\u60c5\u51b5\u8ddf\u8e2a\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": "MediaWiki\u4ee3\u7801\u95ee\u9898\u6f0f\u6d1e\uff08CNVD-2021-35232\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "MediaWiki MediaWiki \u003c=1.35.2"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2021-31553",
  "serverity": "\u4e2d",
  "submitTime": "2021-05-17",
  "title": "MediaWiki\u4ee3\u7801\u95ee\u9898\u6f0f\u6d1e\uff08CNVD-2021-35232\uff09"
}

CVE-2021-31553 (GCVE-0-2021-31553)

Vulnerability from cvelistv5 – Published: 2021-04-22 02:29 – Updated: 2024-08-03 23:03

Summary

An issue was discovered in the CheckUser extension for MediaWiki through 1.35.2. MediaWiki usernames with trailing whitespace could be stored in the cu_log database table such that denial of service occurred for certain CheckUser extension pages and functionality. For example, the attacker could turn off Special:CheckUserLog and thus interfere with usage tracking.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

7 references

URL	Tags
https://phabricator.wikimedia.org/T275669	x_refsource_MISC
https://gerrit.wikimedia.org/r/c/mediawiki/extens…	x_refsource_MISC
https://gerrit.wikimedia.org/r/c/mediawiki/extens…	x_refsource_MISC
https://gerrit.wikimedia.org/r/c/mediawiki/extens…	x_refsource_MISC
https://gerrit.wikimedia.org/r/c/mediawiki/extens…	x_refsource_MISC
https://gerrit.wikimedia.org/r/c/mediawiki/extens…	x_refsource_MISC
https://gerrit.wikimedia.org/r/c/mediawiki/extens…	x_refsource_MISC

Show details on NVD website

JSON

To clipboard

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          },
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          },
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            "tags": [
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            "tags": [
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              "refsource": "MISC",
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            },
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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.