CVE-2023-46817

An issue was discovered in phpFox before 4.8.14. The url request parameter passed to the /core/redirect route is not properly sanitized before being used in a call to the unserialize() PHP function. This can be exploited by remote, unauthenticated attackers to inject arbitrary PHP objects into the application scope, allowing them to perform a variety of attacks, such as executing arbitrary PHP code.

Weakness

The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

Affected Software

Potential Mitigations

• Make fields transient to protect them from deserialization.
• An attempt to serialize and then deserialize a class containing transient fields will result in NULLs where the transient data should be. This is an excellent way to prevent time, environment-based, or sensitive variables from being carried over and used improperly.

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/586.html

References

• http://seclists.org/fulldisclosure/2023/Oct/30
• https://docs.phpfox.com/display/FOX4MAN/phpFox+4.8.14
• https://karmainsecurity.com/KIS-2023-12
• https://karmainsecurity.com/pocs/CVE-2023-46817.php
• https://www.phpfox.com/blog/
• http://seclists.org/fulldisclosure/2023/Oct/30
• https://docs.phpfox.com/display/FOX4MAN/phpFox+4.8.14
• https://karmainsecurity.com/KIS-2023-12
• https://karmainsecurity.com/pocs/CVE-2023-46817.php
• https://www.phpfox.com/blog/