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Advisories

ExcelJS through 4.4.0 Denial of Service via Oversized Data Validation sqref

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Severity
high
Date
Affecting

  • exceljs <= 4.4.0

CWE
  • CWE-770 Allocation of Resources Without Limits or Throttling
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 resource exhaustion vulnerability in data-validations-xform.js that allows attackers to exhaust CPU and memory by supplying unbounded sqref ranges. Attackers can provide a small crafted workbook with a sqref of A1:XFD1048576 to make xlsx.load() iterate billions of addresses, blocking the event loop and crashing the process with an uncatchable out-of-memory error.

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