PhpSpreadsheet: SSRF bypass via HTTP redirect in WEBSERVICE() domain whitelist
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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 5.8.1, 3.10.7, 2.4.7, 2.1.18, 1.30.6
- 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: no
- Technical impact: partial
Summary
PhpSpreadsheet is a pure PHP library for reading and writing spreadsheet files. In versions 4.0.0 through 5.8.0, 3.3.0 through 3.10.6, 2.2.0 through 2.4.6, 2.0.0 through 2.1.17, and all releases up to and including 1.30.5, the WEBSERVICE() domain whitelist can be bypassed via an HTTP redirect (SSRF). In Calculation/Web/Service.php, the webService() method validates a URL's host against the whitelist set via Spreadsheet::setDomainWhiteList(), then fetches content with file_get_contents($url, false, $ctx); because PHP's HTTP stream wrapper follows 301/302 redirects automatically (up to 20 hops) and the redirect target is never re-validated, an attacker who can trigger a redirect from a whitelisted domain can reach arbitrary URLs, including internal addresses. An attacker able to upload XLSX files to an application that uses setDomainWhiteList() and getCalculatedValue() can achieve a full-read SSRF, returning up to 32,767 bytes of the response body as a cell's calculated value, which enables exfiltration of cloud metadata (AWS/GCP/Azure credentials via http://169.254.169.254/), access to internal-only services, and internal port scanning (the port is not validated). This issue has been fixed in versions 5.8.1, 3.10.7, 2.4.7, 2.1.18, and 1.30.6.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: poc · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- PHPOffice PhpSpreadsheet
From 4.0.0 · fixed in 5.8.1; From 3.3.0 · fixed in 3.10.7; From 2.2.0 · fixed in 2.4.7; From 2.0.0 · fixed in 2.1.18; fixed in 1.30.6
- phpoffice/phpspreadsheetPackagist
From 4.0.0 · fixed in 5.8.1
- phpoffice/phpspreadsheetPackagist
From 3.3.0 · fixed in 3.10.7
- phpoffice/phpspreadsheetPackagist
From 2.2.0 · fixed in 2.4.7
- phpoffice/phpspreadsheetPackagist
From 2.0.0 · fixed in 2.1.18
- phpoffice/phpspreadsheetPackagist
fixed in 1.30.6