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CVE-2021-23490— Regular Expression Denial of Service (ReDoS)

Quick assessment

Affected
n/a parse-link-header
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.

parse-link-header是解析链接头并为每个包含的链接返回分页信息。 parse-link-header 2.0.0及之前版本存在安全漏洞，该漏洞源于checkHeader函数容易受到正则表达式拒绝服务攻击。

CVSS 7.5 · High EPSS 1.83% · P78

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2021-23490

Vulnerability Information
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Vulnerability Title
Regular Expression Denial of Service (ReDoS)
Source: CVE Program / CVE List V5
Vulnerability Description
The package parse-link-header before 2.0.0 are vulnerable to Regular Expression Denial of Service (ReDoS) via the checkHeader function.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
parse-link-header 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
parse-link-header是解析链接头并为每个包含的链接返回分页信息。 parse-link-header 2.0.0及之前版本存在安全漏洞，该漏洞源于checkHeader函数容易受到正则表达式拒绝服务攻击。
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
- parse-link-header unspecified ~ 2.0.0 -

II. Public POCs for CVE-2021-23490

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III. Intelligence Information for CVE-2021-23490

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Patches & Fixes for CVE-2021-23490 (1)

Vendor Advisories for CVE-2021-23490 (2)

Same Patch Batch · n/a · 2021-12-24 · 8 CVEs total

CVE-2021-23574 7.5 HIGH Prototype Pollution
CVE-2021-23772 7.5 HIGH Arbitrary File Write
CVE-2021-45480 Linux kernel 安全漏洞
CVE-2021-45471 MediaWiki 安全漏洞
CVE-2021-45472 MediaWiki 跨站脚本漏洞
CVE-2021-45473 MediaWiki 跨站脚本漏洞
CVE-2021-45474 MediaWiki 跨站脚本漏洞

IV. Related Vulnerabilities

Same vendor: n/a

V. Comments for CVE-2021-23490

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