Description
Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. Prior to 2.11.0, the checkSheet() function in github.com/xuri/excelize/v2 uses an attacker-controlled <row r="N"> XML attribute value directly as the length argument to make([]xlsxRow, row) without validating it against the Excel row limit (TotalRows = 1,048,576). A specially crafted XLSX file can trigger two denial-of-service variants: (A) an out-of-memory process kill when r=2147483647 forces a ~16 GB allocation attempt, and (B) a runtime panic via out-of-bounds slice indexing when r=-1. Any service that opens attacker-supplied XLSX files and calls GetCellValue is affected. No authentication is required. This issue is fixed in version 2.11.0.
Problem types
CWE-770: Allocation of Resources Without Limits or Throttling
Product status
References
github.com/...celize/security/advisories/GHSA-h69g-9hx6-f3v4
github.com/...celize/security/advisories/GHSA-h69g-9hx6-f3v4
github.com/qax-os/excelize/releases/tag/v2.11.0