CVE-2019-10867

An issue was discovered in Pimcore before 5.7.1. An attacker with classes permission can send a POST request to /admin/class/bulk-commit, which will make it possible to exploit the unserialize function when passing untrusted values in the data parameter to bundles/AdminBundle/Controller/Admin/DataObject/ClassController.php.

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://packetstormsecurity.com/files/152667/Pimcore-Unserialize-Remote-Code-Execution.html
• http://www.rapid7.com/db/modules/exploit/multi/http/pimcore_unserialize_rce
• https://blog.certimetergroup.com/it/articolo/security/polyglot_phar_deserialization_to_rce
• https://github.com/pimcore/pimcore/commit/38a29e2f4f5f060a73974626952501cee05fda73
• https://snyk.io/vuln/SNYK-PHP-PIMCOREPIMCORE-173998
• https://www.exploit-db.com/exploits/46783/
• http://packetstormsecurity.com/files/152667/Pimcore-Unserialize-Remote-Code-Execution.html
• http://www.rapid7.com/db/modules/exploit/multi/http/pimcore_unserialize_rce
• https://blog.certimetergroup.com/it/articolo/security/polyglot_phar_deserialization_to_rce
• https://github.com/pimcore/pimcore/commit/38a29e2f4f5f060a73974626952501cee05fda73
• https://snyk.io/vuln/SNYK-PHP-PIMCOREPIMCORE-173998
• https://www.exploit-db.com/exploits/46783/