CVE-2019-16317

In Pimcore before 5.7.1, an attacker with limited privileges can trigger execution of a .phar file via a phar:// URL in a filename parameter, because PHAR uploads are not blocked and are reachable within the phar://../../../../../../../../var/www/html/web/var/assets/ directory, a different vulnerability than CVE-2019-10867 and CVE-2019-16318.

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://github.com/pimcore/pimcore/commit/6ee5d8536d0802e377594cbe39083e822710aab9
• https://snyk.io/vuln/SNYK-PHP-PIMCOREPIMCORE-451599
• https://github.com/pimcore/pimcore/commit/6ee5d8536d0802e377594cbe39083e822710aab9
• https://snyk.io/vuln/SNYK-PHP-PIMCOREPIMCORE-451599