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CVE-2021-43308— Exponential ReDoS in markdown-link-extractor

Quick assessment

Affected
markdown-link-extractor markdown-link-extractor
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.

npm markdown-link-extractor是美国npm公司的用于从 Markdown 文本中提取链接。 npm markdown-link-extractor 3.0.1 和 4.0.0 版本存在安全漏洞，攻击者利用该漏洞可向模块的导出函数提供任意输入时触发指数 ReDoS（正则表达式拒绝服务）。

CVSS 5.9 · Medium EPSS 1.10% · P65

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2021-43308

Vulnerability Information
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Vulnerability Title
Exponential ReDoS in markdown-link-extractor
Source: CVE Program / CVE List V5
Vulnerability Description
An exponential ReDoS (Regular Expression Denial of Service) can be triggered in the markdown-link-extractor npm package, when an attacker is able to supply arbitrary input to the module's exported function
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1333
Source: CVE Program / CVE List V5
Vulnerability Title
npm markdown-link-extractor 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
npm markdown-link-extractor是美国npm公司的用于从 Markdown 文本中提取链接。 npm markdown-link-extractor 3.0.1 和 4.0.0 版本存在安全漏洞，攻击者利用该漏洞可向模块的导出函数提供任意输入时触发指数 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
markdown-link-extractor markdown-link-extractor unspecified ~ 3.0.2 -

II. Public POCs for CVE-2021-43308

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III. Intelligence Information for CVE-2021-43308

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Other References for CVE-2021-43308 (1)

IV. Related Vulnerabilities

Same weakness: CWE-1333

V. Comments for CVE-2021-43308

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