Fix infinite loop in TAR extraction when encountering invalid file sizes #12543
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prestoalvarez
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DaniPopes,
grandizzy,
mattsse,
onbjerg and
zerosnacks
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The
extractFileFromTarballfunction innpm/src/install.mjscould enter an infinite loop when processing TAR archives with corrupted or malicious headers. IffileSizeparsing resulted inNaN(due to invalid octal data in the TAR header), the offset calculation(offset + fileSize + 511) & ~511would evaluate to0, causing the parser to repeatedly process the same header block without advancing.