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CVE-2023-28626— Quadratic runtime when parsing Markdown in comrak

Quick assessment

Affected
kivikakk comrak
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.

Comrak是Asherah Connor个人开发者的一个 CommonMark+GFM 兼容 Markdown 解析器和渲染器。 comrak 0.17.0之前版本存在资源管理错误漏洞，该漏洞源于使用 Comrak解析Markdown时存在拒绝服务攻击。

CVSS 5.3 · Medium EPSS 1.12% · P64

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2023-28626

Vulnerability Information
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Vulnerability Title
Quadratic runtime when parsing Markdown in comrak
Source: CVE Program / CVE List V5
Vulnerability Description
comrak is a CommonMark + GFM compatible Markdown parser and renderer written in rust. A range of quadratic parsing issues are present in Comrak. These can be used to craft denial-of-service attacks on services that use Comrak to parse Markdown. This issue has been addressed in version 0.17.0. Users are advised to upgrade. There are no known workarounds for this vulnerability. This issue is also tracked as `GHSL-2023-047`
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:L
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
Comrak 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Comrak是Asherah Connor个人开发者的一个 CommonMark+GFM 兼容 Markdown 解析器和渲染器。 comrak 0.17.0之前版本存在资源管理错误漏洞，该漏洞源于使用 Comrak解析Markdown时存在拒绝服务攻击。
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
kivikakk comrak < 0.17.0 -

II. Public POCs for CVE-2023-28626

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III. Intelligence Information for CVE-2023-28626

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Patches & Fixes for CVE-2023-28626 (1)

Vendor Advisories for CVE-2023-28626 (1)

Mailing List Discussions for CVE-2023-28626 (3)

IV. Related Vulnerabilities

Same product: comrak
Same vendor: kivikakk
Same weakness: CWE-400

V. Comments for CVE-2023-28626

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