PhpSpreadsheet: CPU Denial of Service via Unbounded Row Number in XLSX Row Dimensions
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 1.30.4, 2.1.16, 2.4.5, 3.10.5, 5.7.0
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: poc
- Automatable: yes
- Technical impact: partial
Summary
PhpSpreadsheet is a pure PHP library for reading and writing spreadsheet files. Prior to 1.30.4, 2.1.16, 2.4.5, 3.10.5, and 5.7.0, the XLSX reader's ColumnAndRowAttributes::readRowAttributes() method reads row numbers from XML attributes without validating them against the spreadsheet maximum row limit (AddressRange::MAX_ROW = 1,048,576). An attacker can craft a minimal XLSX file (~1.6KB) containing a <row r="999999999"/> element that inflates cachedHighestRow to 999,999,999, causing any subsequent row iteration to attempt ~1 billion loop cycles and exhaust CPU resources. This vulnerability is fixed in 1.30.4, 2.1.16, 2.4.5, 3.10.5, and 5.7.0.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: poc · Automatable: yes · Technical impact: partial
- Record last updated
Affected versions
- PHPOffice PhpSpreadsheet
fixed in 1.30.4; From 2.0.0 · fixed in 2.1.16; From 2.2.0 · fixed in 2.4.5; From 3.3.0 · fixed in 3.10.5; From 4.0.0 · fixed in 5.7.0
- phpoffice/phpspreadsheetPackagist
From 4.0.0 · fixed in 5.7.0
- phpoffice/phpspreadsheetPackagist
From 3.3.0 · fixed in 3.10.5
- phpoffice/phpspreadsheetPackagist
From 2.2.0 · fixed in 2.4.5
- phpoffice/phpspreadsheetPackagist
From 2.0.0 · fixed in 2.1.16
- phpoffice/phpspreadsheetPackagist
fixed in 1.30.4