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Concrete5 <= 8.5.5 Phar Deserialization Vulnerability
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
Concrete5 is prone to a deserialization vulnerability.
Insight
Insight
Concrete5 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.
Affected Software
Affected Software
Concrete5 version 8.5.5 and prior.
Detection Method
Detection Method
Checks if a vulnerable version is present on the target host.
Solution
Solution
No known solution is available as of 02nd August, 2021. Information regarding this issue will be updated once solution details are available.