Vulnerabilities > CVE-2021-36766 - Deserialization of Untrusted Data vulnerability in Concretecms Concrete CMS
Summary
Concrete5 through 8.5.5 deserializes Untrusted Data. The vulnerable code is located within the controllers/single_page/dashboard/system/environment/logging.php Logging::update_logging() method. User input passed through the logFile request parameter is not properly sanitized before being used in a call to the file_exists() PHP function. This can be exploited by malicious users to inject arbitrary PHP objects into the application scope (PHP Object Injection via phar:// stream wrapper), allowing them to carry out a variety of attacks, such as executing arbitrary PHP code.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
References
- http://packetstormsecurity.com/files/163564/Concrete5-8.5.5-Phar-Deserialization.html
- http://packetstormsecurity.com/files/163564/Concrete5-8.5.5-Phar-Deserialization.html
- http://seclists.org/fulldisclosure/2021/Jul/36
- http://seclists.org/fulldisclosure/2021/Jul/36
- https://hackerone.com/reports/1063039
- https://hackerone.com/reports/1063039