Smarty is a template engine for PHP, facilitating the separation of presentation (HTML/CSS) from application logic. From 5.0.0 until 5.8.4, Smarty's stream: resource-name handling does not adequately restrict which PHP stream wrappers and filter chains can be referenced from a template, allowing a php://filter-wrapped resource name to be used to read the contents of arbitrary local files accessible to the PHP process. An attacker able to author or influence a template's resource reference could exploit this to disclose sensitive file contents outside the intended template/config scope.
This issue is fixed in version 5.8.4.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
High
Admin privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products
smarty-php:smarty
References 4
https://github.com/smarty-php/smarty/security/advisories/GHSA-rjhh-76wf-8xmw
https://github.com/smarty-php/smarty/security/advisories/GHSA-rjhh-76wf-8xmw
https://github.com/smarty-php/smarty/pull/1195
https://github.com/smarty-php/smarty/pull/1195
https://github.com/smarty-php/smarty/commit/3c9f77a2e06ce319ae0092496af32cc8f3a…
https://github.com/smarty-php/smarty/commit/3c9f77a2e06ce319ae0092496af32cc8f3adc52e
https://github.com/smarty-php/smarty/releases/tag/v5.8.4
https://github.com/smarty-php/smarty/releases/tag/v5.8.4