FreeScout's deserialization of untrusted data can lead to Remote Code Execution
Summary
FreeScout's deserialization of untrusted data can lead to Remote Code Execution
Original description
The description as published by the source.
FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Versions 1.8.185 and earlier contain a deserialization of untrusted data vulnerability that allows authenticated attackers with knowledge of the application's APP_KEY to achieve remote code execution. The vulnerability is exploited via endpoint, e.g.: /help/{mailbox_id}/auth/{customer_id}/{hash}/{timestamp} where the customer_id and timestamp parameters are processed through the decrypt function in app/Helper.php without proper validation. The code decrypts using Laravel's built-in encryption functions, which subsequently deserialize the decrypted payload without sanitization, allowing attackers to craft malicious serialized PHP objects using classes to trigger arbitrary command execution. This is fixed in version 1.8.186.
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
References
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov
- patch github.com
- web github.com