app/Model/Server.php in MISP 2.4.109 allows remote command execution by a super administrator because the PHP file_exists function is used with user-controlled entries, and phar:// URLs trigger deserialization.
Weakness
The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Misp | Misp | 2.4.109 (including) | 2.4.109 (including) |
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
References
- https://github.com/MISP/MISP/commit/c42c5fe92783dd306b7600db1f6a25324445b40c
- https://zigrin.com/advisories/misp-command-injection-via-phar-deserialization/
- https://github.com/MISP/MISP/commit/c42c5fe92783dd306b7600db1f6a25324445b40c
- https://zigrin.com/advisories/misp-command-injection-via-phar-deserialization/