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CVE-2024-28244— KaTeX's maxExpand bypassed by Unicode sub/superscripts

Quick assessment

Affected
KaTeX KaTeX
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.

KaTeX是一个快速、易于使用的 JavaScript 库，用于在网络上进行 TeX 数学渲染。 KaTeX v0.16.10 版本之前存在安全漏洞，该漏洞源于呈现不受信任的数学表达式的 KaTeX 用户可能会遇到使用 def 或 ewcommand 的恶意输入，可能导致近乎无限的循环。

CVSS 6.5 · Medium EPSS 2.15% · P82
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I. Basic Information for CVE-2024-28244

Vulnerability Information
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Vulnerability Title
KaTeX's maxExpand bypassed by Unicode sub/superscripts
Source: CVE Program / CVE List V5
Vulnerability Description
KaTeX is a JavaScript library for TeX math rendering on the web. KaTeX users who render untrusted mathematical expressions could encounter malicious input using `\def` or `\newcommand` that causes a near-infinite loop, despite setting `maxExpand` to avoid such loops. KaTeX supports an option named maxExpand which aims to prevent infinitely recursive macros from consuming all available memory and/or triggering a stack overflow error. Unfortunately, support for "Unicode (sub|super)script characters" allows an attacker to bypass this limit. Each sub/superscript group instantiated a separate Parser with its own limit on macro executions, without inheriting the current count of macro executions from its parent. This has been corrected in KaTeX v0.16.10.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未经控制的递归
Source: CVE Program / CVE List V5
Vulnerability Title
KaTeX 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
KaTeX是一个快速、易于使用的 JavaScript 库，用于在网络上进行 TeX 数学渲染。 KaTeX v0.16.10 版本之前存在安全漏洞，该漏洞源于呈现不受信任的数学表达式的 KaTeX 用户可能会遇到使用 def 或 ewcommand 的恶意输入，可能导致近乎无限的循环。
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
KaTeX KaTeX >= 0.15.4, < 0.16.10 -

II. Public POCs for CVE-2024-28244

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III. Intelligence Information for CVE-2024-28244

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Patches & Fixes for CVE-2024-28244 (1)

Vendor Advisories for CVE-2024-28244 (1)

Same Patch Batch · KaTeX · 2024-03-25 · 4 CVEs total

CVE-2024-28243 6.5 MEDIUM KaTeX's maxExpand bypassed by \edef
CVE-2024-28245 6.3 MEDIUM KaTeX's \includegraphics does not escape filename
CVE-2024-28246 5.5 MEDIUM KaTeX is missing normalization of the protocol in URLs allows bypassing forbidden protocol

IV. Related Vulnerabilities

Same product: KaTeX
Same vendor: KaTeX
Same weakness: CWE-674

V. Comments for CVE-2024-28244

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