PhpSpreadsheet: CPU Denial of Service via Unbounded Row Index in SpreadsheetML XML Reader
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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, and 1 more
- 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 SpreadsheetML XML reader (Reader\Xml) does not validate the ss:Index row attribute against the maximum allowed row count (AddressRange::MAX_ROW = 1,048,576). An attacker can craft a SpreadsheetML XML file with ss:Index="999999999" on a <Row> element, which inflates the internal cachedHighestRow to ~1 billion. Any subsequent call to getRowIterator() without an explicit end row will attempt to iterate ~1 billion rows, causing CPU exhaustion and denial of service. 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 1.30.6