CVE-2024-28243 KaTeX's maxExpand bypassed by \edef

2024-03-2519:40:00

CWE-674

GitHub_M

www.cve.org

katex

javascript

mathematical expressions

availability attack

upgrade

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

0.0004 Low

EPSS

Percentile

9.0%

JSON

KaTeX is a JavaScript library for TeX math rendering on the web. KaTeX users who render untrusted mathematical expressions could encounter malicious input using \edef that causes a near-infinite loop, despite setting maxExpand to avoid such loops. This can be used as an availability attack, where e.g. a client rendering another user’s KaTeX input will be unable to use the site due to memory overflow, tying up the main thread, or stack overflow. Upgrade to KaTeX v0.16.10 to remove this vulnerability.

CNA Affected

[
  {
    "vendor": "KaTeX",
    "product": "KaTeX",
    "versions": [
      {
        "version": ">= v0.10.0-beta, < 0.16.10",
        "status": "affected"
      }
    ]
  }
]