Rendering hang via reset macro-expansion counters
Published Mar 25, 2024 · Updated Aug 2, 2024
Denial of service in KaTeX 0.15.4 through 0.16.9 allows remote authenticated users to hang rendering via crafted math input. Each Unicode subscript or superscript group creates a new Parser with a fresh macro-expansion count instead of inheriting its parent's count, bypassing maxExpand. The target must render untrusted \def or \newcommand expressions; processing can tie up the main thread, exhaust memory, or overflow the stack.
Summary
What happened
Denial of service in KaTeX 0.15.4 through 0.16.9 allows remote authenticated users to hang rendering via crafted math input. Each Unicode subscript or superscript group creates a new Parser with a fresh macro-expansion count instead of inheriting its parent's count, bypassing maxExpand. The target must render untrusted \def or \newcommand expressions; processing can tie up the main thread, exhaust memory, or overflow the stack.
The record
- CVE
- CVE-2024-28244
- Published
- Mar 25, 2024
- Updated
- Aug 2, 2024
- Vendor
- KaTeX
- Product
- KaTeX
- Classifications
- CWE-606, T1499.004
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Mar 25, 2024CVE publishedPublication date reported by the CVE source.
- Aug 2, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=>= 0.15.4, < 0.16.10
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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