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CVE-2021-43307— Exponential ReDoS in semver-regex

Quick assessment

Affected
semver-regex semver-regex
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.

semver-regex是用于匹配semver版本的正则表达式。 semver-regex 3.1.3、4.0.0 和 4.0.2 版本存在安全漏洞，攻击者利用该漏洞可向 test() 方法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 1.56% · P75

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2021-43307

Vulnerability Information
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Vulnerability Title
Exponential ReDoS in semver-regex
Source: CVE Program / CVE List V5
Vulnerability Description
An exponential ReDoS (Regular Expression Denial of Service) can be triggered in the semver-regex npm package, when an attacker is able to supply arbitrary input to the test() method
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
semver-regex 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
semver-regex是用于匹配semver版本的正则表达式。 semver-regex 3.1.3、4.0.0 和 4.0.2 版本存在安全漏洞，攻击者利用该漏洞可向 test() 方法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
semver-regex semver-regex unspecified ~ 3.1.4 -

II. Public POCs for CVE-2021-43307

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III. Intelligence Information for CVE-2021-43307

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Other References for CVE-2021-43307 (1)

IV. Related Vulnerabilities

Same weakness: CWE-1333

V. Comments for CVE-2021-43307

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