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Advisories

ExcelJS through 4.4.0 Denial of Service via Oversized Row Number

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Severity
high
Date
Affecting

  • exceljs <= 4.4.0

CWE
  • CWE-606 Unchecked Input for Loop Condition
CVSS
8.7
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Credit
Matéo Florian Callec
Description
exceljs through 4.4.0 contains a denial of service vulnerability that allows attackers to block the event loop by supplying unbounded row r attributes parsed in row-xform.js. Attackers can craft an XLSX file with a row numbered far beyond Excel's limit, making getSheetValues(), workbook writes and CSV export consume time proportional to that number.

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