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CVE-2021-41118— ReDoS in DynamicPageList3

Quick assessment

Affected
Universal-Omega DynamicPageList3
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

DynamicPageList是一个动态生成页面链接的MediaWiki扩展，支持属于多个类别的页面的交叉和其他集合操作。 DynamicPageList3 扩展存在资源管理错误漏洞，该漏洞源于DPL 解析器函数的参数中输入了未经处理的正则表达式日期，从而允许出现 ReDoS（正则表达式拒绝服务）。

CVSS 5.3 · Medium EPSS 1.16% · P65

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2021-41118

Vulnerability Information
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Vulnerability Title
ReDoS in DynamicPageList3
Source: CVE Program / CVE List V5
Vulnerability Description
The DynamicPageList3 extension is a reporting tool for MediaWiki, listing category members and intersections with various formats and details. In affected versions unsanitised input of regular expression date within the parameters of the DPL parser function, allowed for the possibility of ReDoS (Regex Denial of Service). This has been resolved in version 3.3.6. If you are unable to update you may also set `$wgDplSettings['functionalRichness'] = 0;` or disable DynamicPageList3 to mitigate.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
DynamicPageList 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
DynamicPageList是一个动态生成页面链接的MediaWiki扩展，支持属于多个类别的页面的交叉和其他集合操作。 DynamicPageList3 扩展存在资源管理错误漏洞，该漏洞源于DPL 解析器函数的参数中输入了未经处理的正则表达式日期，从而允许出现 ReDoS（正则表达式拒绝服务）。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Universal-Omega DynamicPageList3 < 3.3.6 -

II. Public POCs for CVE-2021-41118

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III. Intelligence Information for CVE-2021-41118

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Patches & Fixes for CVE-2021-41118 (1)

Vendor Advisories for CVE-2021-41118 (1)

Other References for CVE-2021-41118 (1)

IV. Related Vulnerabilities

Same product: DynamicPageList3
Same vendor: Universal-Omega
Same weakness: CWE-400

V. Comments for CVE-2021-41118

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