CVE-2018-1000525

openpsa contains a PHP Object Injection vulnerability in Form data passed as GET request variables that can result in Possible information disclosure and remote code execution. This attack appear to be exploitable via Specially crafted GET request variable containing serialised PHP object. This vulnerability appears to have been fixed in after commit 097eae0.

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

• https://0dd.zone/2018/05/31/OpenPSA-Object-Injection/
• https://github.com/flack/openpsa/issues/191
• https://0dd.zone/2018/05/31/OpenPSA-Object-Injection/
• https://github.com/flack/openpsa/issues/191