Description
PhpWeasyPrint is a PHP library allowing PDF generation from a URL or an HTML page. Prior to version 2.6.0, `AbstractGenerator::$temporaryFiles` is a public array, and `removeTemporaryFiles()` — invoked from `__destruct()` and from a registered shutdown function — calls `unlink()` on every entry without verifying that the path is contained within the temporary folder. Any code holding a reference to a generator instance can push an arbitrary path into the array and have it deleted on script shutdown. This mirrors the KnpLabs/snappy issue GHSA-87qc-37cw-84h4. PhpWeasyPrint version 2.6.0 contains a patch for the issue.
CVSS breakdown
CVSS 3.1
Attack Vector
Local
Attack Complexity
High
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
Low
Affected products
- pontedilana / php-weasyprint< 2.6.0 – < 2.6.0
References
- VENDOR_ADVISORYhttps://github.com/pontedilana/php-weasyprint/security/advisories/GHSA-5g9f-cwwg-4p8g
- VENDOR_ADVISORYhttps://github.com/KnpLabs/snappy/security/advisories/GHSA-87qc-37cw-84h4
- PATCHhttps://github.com/pontedilana/php-weasyprint/commit/6d328ffd3bcb800c7c2e8a594b1bff0c099c9391
- PATCHhttps://github.com/pontedilana/php-weasyprint/releases/tag/2.6.0